Merging with master.
diff --git a/BUILD b/BUILD
index 35e8f44..881fffd 100644
--- a/BUILD
+++ b/BUILD
@@ -130,6 +130,7 @@
     "src/core/httpcli/parser.h",
     "src/core/security/auth.h",
     "src/core/security/base64.h",
+    "src/core/security/context.h",
     "src/core/security/credentials.h",
     "src/core/security/json_token.h",
     "src/core/security/secure_endpoint.h",
@@ -232,6 +233,7 @@
     "src/core/httpcli/parser.c",
     "src/core/security/auth.c",
     "src/core/security/base64.c",
+    "src/core/security/context.c",
     "src/core/security/credentials.c",
     "src/core/security/credentials_posix.c",
     "src/core/security/credentials_win32.c",
diff --git a/Makefile b/Makefile
index d646d85..c3369d7 100644
--- a/Makefile
+++ b/Makefile
@@ -714,7 +714,7 @@
 chttp2_fake_security_request_response_with_binary_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_binary_metadata_and_payload_test
 chttp2_fake_security_request_response_with_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_metadata_and_payload_test
 chttp2_fake_security_request_response_with_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_payload_test
-chttp2_fake_security_request_response_with_trailing_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_trailing_metadata_and_payload_test
+chttp2_fake_security_request_response_with_payload_and_call_creds_test: $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_payload_and_call_creds_test
 chttp2_fake_security_request_with_large_metadata_test: $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_with_large_metadata_test
 chttp2_fake_security_request_with_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_with_payload_test
 chttp2_fake_security_simple_delayed_request_test: $(BINDIR)/$(CONFIG)/chttp2_fake_security_simple_delayed_request_test
@@ -741,7 +741,7 @@
 chttp2_fullstack_request_response_with_binary_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_binary_metadata_and_payload_test
 chttp2_fullstack_request_response_with_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_metadata_and_payload_test
 chttp2_fullstack_request_response_with_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_test
-chttp2_fullstack_request_response_with_trailing_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_trailing_metadata_and_payload_test
+chttp2_fullstack_request_response_with_payload_and_call_creds_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_and_call_creds_test
 chttp2_fullstack_request_with_large_metadata_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_large_metadata_test
 chttp2_fullstack_request_with_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_payload_test
 chttp2_fullstack_simple_delayed_request_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_delayed_request_test
@@ -768,7 +768,7 @@
 chttp2_fullstack_uds_request_response_with_binary_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_binary_metadata_and_payload_test
 chttp2_fullstack_uds_request_response_with_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_metadata_and_payload_test
 chttp2_fullstack_uds_request_response_with_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_payload_test
-chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_test
+chttp2_fullstack_uds_request_response_with_payload_and_call_creds_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_payload_and_call_creds_test
 chttp2_fullstack_uds_request_with_large_metadata_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_with_large_metadata_test
 chttp2_fullstack_uds_request_with_payload_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_with_payload_test
 chttp2_fullstack_uds_simple_delayed_request_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_simple_delayed_request_test
@@ -795,7 +795,7 @@
 chttp2_simple_ssl_fullstack_request_response_with_binary_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_binary_metadata_and_payload_test
 chttp2_simple_ssl_fullstack_request_response_with_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_metadata_and_payload_test
 chttp2_simple_ssl_fullstack_request_response_with_payload_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_payload_test
-chttp2_simple_ssl_fullstack_request_response_with_trailing_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_trailing_metadata_and_payload_test
+chttp2_simple_ssl_fullstack_request_response_with_payload_and_call_creds_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_payload_and_call_creds_test
 chttp2_simple_ssl_fullstack_request_with_large_metadata_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_with_large_metadata_test
 chttp2_simple_ssl_fullstack_request_with_payload_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_with_payload_test
 chttp2_simple_ssl_fullstack_simple_delayed_request_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_simple_delayed_request_test
@@ -822,7 +822,7 @@
 chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_binary_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_binary_metadata_and_payload_test
 chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_metadata_and_payload_test
 chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_test
-chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_trailing_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_trailing_metadata_and_payload_test
+chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_and_call_creds_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_and_call_creds_test
 chttp2_simple_ssl_with_oauth2_fullstack_request_with_large_metadata_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_with_large_metadata_test
 chttp2_simple_ssl_with_oauth2_fullstack_request_with_payload_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_with_payload_test
 chttp2_simple_ssl_with_oauth2_fullstack_simple_delayed_request_test: $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_simple_delayed_request_test
@@ -849,7 +849,7 @@
 chttp2_socket_pair_request_response_with_binary_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_binary_metadata_and_payload_test
 chttp2_socket_pair_request_response_with_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_metadata_and_payload_test
 chttp2_socket_pair_request_response_with_payload_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_test
-chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_test
+chttp2_socket_pair_request_response_with_payload_and_call_creds_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_and_call_creds_test
 chttp2_socket_pair_request_with_large_metadata_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_large_metadata_test
 chttp2_socket_pair_request_with_payload_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_payload_test
 chttp2_socket_pair_simple_delayed_request_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_delayed_request_test
@@ -876,7 +876,7 @@
 chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_test
 chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_test
 chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_test
-chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_test
+chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_and_call_creds_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_and_call_creds_test
 chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_test
 chttp2_socket_pair_one_byte_at_a_time_request_with_payload_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_payload_test
 chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_test
@@ -903,7 +903,6 @@
 chttp2_fullstack_request_response_with_binary_metadata_and_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_binary_metadata_and_payload_unsecure_test
 chttp2_fullstack_request_response_with_metadata_and_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_metadata_and_payload_unsecure_test
 chttp2_fullstack_request_response_with_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_unsecure_test
-chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test
 chttp2_fullstack_request_with_large_metadata_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_large_metadata_unsecure_test
 chttp2_fullstack_request_with_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_payload_unsecure_test
 chttp2_fullstack_simple_delayed_request_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_delayed_request_unsecure_test
@@ -930,7 +929,6 @@
 chttp2_fullstack_uds_request_response_with_binary_metadata_and_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_binary_metadata_and_payload_unsecure_test
 chttp2_fullstack_uds_request_response_with_metadata_and_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_metadata_and_payload_unsecure_test
 chttp2_fullstack_uds_request_response_with_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_payload_unsecure_test
-chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test
 chttp2_fullstack_uds_request_with_large_metadata_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_with_large_metadata_unsecure_test
 chttp2_fullstack_uds_request_with_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_with_payload_unsecure_test
 chttp2_fullstack_uds_simple_delayed_request_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_simple_delayed_request_unsecure_test
@@ -957,7 +955,6 @@
 chttp2_socket_pair_request_response_with_binary_metadata_and_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_binary_metadata_and_payload_unsecure_test
 chttp2_socket_pair_request_response_with_metadata_and_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_metadata_and_payload_unsecure_test
 chttp2_socket_pair_request_response_with_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_unsecure_test
-chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test
 chttp2_socket_pair_request_with_large_metadata_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_large_metadata_unsecure_test
 chttp2_socket_pair_request_with_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_payload_unsecure_test
 chttp2_socket_pair_simple_delayed_request_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_delayed_request_unsecure_test
@@ -984,7 +981,6 @@
 chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_unsecure_test
 chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_unsecure_test
 chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_unsecure_test
-chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test
 chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test
 chttp2_socket_pair_one_byte_at_a_time_request_with_payload_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_payload_unsecure_test
 chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_unsecure_test: $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_unsecure_test
@@ -1076,13 +1072,13 @@
 
 privatelibs: privatelibs_c privatelibs_cxx
 
-privatelibs_c:  $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fake_security.a $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack_uds.a $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_simple_ssl_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_simple_ssl_with_oauth2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair.a $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair_one_byte_at_a_time.a $(LIBDIR)/$(CONFIG)/libend2end_test_bad_hostname.a $(LIBDIR)/$(CONFIG)/libend2end_test_cancel_after_accept.a $(LIBDIR)/$(CONFIG)/libend2end_test_cancel_after_accept_and_writes_closed.a $(LIBDIR)/$(CONFIG)/libend2end_test_cancel_after_invoke.a $(LIBDIR)/$(CONFIG)/libend2end_test_cancel_before_invoke.a $(LIBDIR)/$(CONFIG)/libend2end_test_cancel_in_a_vacuum.a $(LIBDIR)/$(CONFIG)/libend2end_test_census_simple_request.a $(LIBDIR)/$(CONFIG)/libend2end_test_disappearing_server.a $(LIBDIR)/$(CONFIG)/libend2end_test_early_server_shutdown_finishes_inflight_calls.a $(LIBDIR)/$(CONFIG)/libend2end_test_early_server_shutdown_finishes_tags.a $(LIBDIR)/$(CONFIG)/libend2end_test_empty_batch.a $(LIBDIR)/$(CONFIG)/libend2end_test_graceful_server_shutdown.a $(LIBDIR)/$(CONFIG)/libend2end_test_invoke_large_request.a $(LIBDIR)/$(CONFIG)/libend2end_test_max_concurrent_streams.a $(LIBDIR)/$(CONFIG)/libend2end_test_max_message_length.a $(LIBDIR)/$(CONFIG)/libend2end_test_no_op.a $(LIBDIR)/$(CONFIG)/libend2end_test_ping_pong_streaming.a $(LIBDIR)/$(CONFIG)/libend2end_test_registered_call.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_binary_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_with_large_metadata.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_with_payload.a $(LIBDIR)/$(CONFIG)/libend2end_test_simple_delayed_request.a $(LIBDIR)/$(CONFIG)/libend2end_test_simple_request.a $(LIBDIR)/$(CONFIG)/libend2end_test_simple_request_with_high_initial_sequence_number.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a
+privatelibs_c:  $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fake_security.a $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack_uds.a $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_simple_ssl_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_simple_ssl_with_oauth2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair.a $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair_one_byte_at_a_time.a $(LIBDIR)/$(CONFIG)/libend2end_test_bad_hostname.a $(LIBDIR)/$(CONFIG)/libend2end_test_cancel_after_accept.a $(LIBDIR)/$(CONFIG)/libend2end_test_cancel_after_accept_and_writes_closed.a $(LIBDIR)/$(CONFIG)/libend2end_test_cancel_after_invoke.a $(LIBDIR)/$(CONFIG)/libend2end_test_cancel_before_invoke.a $(LIBDIR)/$(CONFIG)/libend2end_test_cancel_in_a_vacuum.a $(LIBDIR)/$(CONFIG)/libend2end_test_census_simple_request.a $(LIBDIR)/$(CONFIG)/libend2end_test_disappearing_server.a $(LIBDIR)/$(CONFIG)/libend2end_test_early_server_shutdown_finishes_inflight_calls.a $(LIBDIR)/$(CONFIG)/libend2end_test_early_server_shutdown_finishes_tags.a $(LIBDIR)/$(CONFIG)/libend2end_test_empty_batch.a $(LIBDIR)/$(CONFIG)/libend2end_test_graceful_server_shutdown.a $(LIBDIR)/$(CONFIG)/libend2end_test_invoke_large_request.a $(LIBDIR)/$(CONFIG)/libend2end_test_max_concurrent_streams.a $(LIBDIR)/$(CONFIG)/libend2end_test_max_message_length.a $(LIBDIR)/$(CONFIG)/libend2end_test_no_op.a $(LIBDIR)/$(CONFIG)/libend2end_test_ping_pong_streaming.a $(LIBDIR)/$(CONFIG)/libend2end_test_registered_call.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_binary_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_with_large_metadata.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_with_payload.a $(LIBDIR)/$(CONFIG)/libend2end_test_simple_delayed_request.a $(LIBDIR)/$(CONFIG)/libend2end_test_simple_request.a $(LIBDIR)/$(CONFIG)/libend2end_test_simple_request_with_high_initial_sequence_number.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a
 
 privatelibs_cxx:  $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libinterop_client_helper.a $(LIBDIR)/$(CONFIG)/libinterop_client_main.a $(LIBDIR)/$(CONFIG)/libinterop_server_helper.a $(LIBDIR)/$(CONFIG)/libinterop_server_main.a $(LIBDIR)/$(CONFIG)/libqps.a
 
 buildtests: buildtests_c buildtests_cxx
 
-buildtests_c: privatelibs_c $(BINDIR)/$(CONFIG)/alarm_heap_test $(BINDIR)/$(CONFIG)/alarm_list_test $(BINDIR)/$(CONFIG)/alarm_test $(BINDIR)/$(CONFIG)/alpn_test $(BINDIR)/$(CONFIG)/bin_encoder_test $(BINDIR)/$(CONFIG)/census_hash_table_test $(BINDIR)/$(CONFIG)/census_statistics_multiple_writers_circular_buffer_test $(BINDIR)/$(CONFIG)/census_statistics_multiple_writers_test $(BINDIR)/$(CONFIG)/census_statistics_performance_test $(BINDIR)/$(CONFIG)/census_statistics_quick_test $(BINDIR)/$(CONFIG)/census_statistics_small_log_test $(BINDIR)/$(CONFIG)/census_stub_test $(BINDIR)/$(CONFIG)/census_window_stats_test $(BINDIR)/$(CONFIG)/chttp2_status_conversion_test $(BINDIR)/$(CONFIG)/chttp2_stream_encoder_test $(BINDIR)/$(CONFIG)/chttp2_stream_map_test $(BINDIR)/$(CONFIG)/dualstack_socket_test $(BINDIR)/$(CONFIG)/fd_posix_test $(BINDIR)/$(CONFIG)/fling_client $(BINDIR)/$(CONFIG)/fling_server $(BINDIR)/$(CONFIG)/fling_stream_test $(BINDIR)/$(CONFIG)/fling_test $(BINDIR)/$(CONFIG)/gpr_cancellable_test $(BINDIR)/$(CONFIG)/gpr_cmdline_test $(BINDIR)/$(CONFIG)/gpr_env_test $(BINDIR)/$(CONFIG)/gpr_file_test $(BINDIR)/$(CONFIG)/gpr_histogram_test $(BINDIR)/$(CONFIG)/gpr_host_port_test $(BINDIR)/$(CONFIG)/gpr_log_test $(BINDIR)/$(CONFIG)/gpr_slice_buffer_test $(BINDIR)/$(CONFIG)/gpr_slice_test $(BINDIR)/$(CONFIG)/gpr_string_test $(BINDIR)/$(CONFIG)/gpr_sync_test $(BINDIR)/$(CONFIG)/gpr_thd_test $(BINDIR)/$(CONFIG)/gpr_time_test $(BINDIR)/$(CONFIG)/gpr_tls_test $(BINDIR)/$(CONFIG)/gpr_useful_test $(BINDIR)/$(CONFIG)/grpc_base64_test $(BINDIR)/$(CONFIG)/grpc_byte_buffer_reader_test $(BINDIR)/$(CONFIG)/grpc_channel_stack_test $(BINDIR)/$(CONFIG)/grpc_completion_queue_test $(BINDIR)/$(CONFIG)/grpc_credentials_test $(BINDIR)/$(CONFIG)/grpc_json_token_test $(BINDIR)/$(CONFIG)/grpc_stream_op_test $(BINDIR)/$(CONFIG)/hpack_parser_test $(BINDIR)/$(CONFIG)/hpack_table_test $(BINDIR)/$(CONFIG)/httpcli_format_request_test 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$(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_max_message_length_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_no_op_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_registered_call_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_and_call_creds_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_request_with_high_initial_sequence_number_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_max_message_length_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_no_op_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_registered_call_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_and_call_creds_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_request_with_high_initial_sequence_number_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_bad_hostname_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_accept_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_accept_and_writes_closed_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_before_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_in_a_vacuum_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_census_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_disappearing_server_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_delayed_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_bad_hostname_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_after_accept_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_after_accept_and_writes_closed_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_after_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_before_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_cancel_in_a_vacuum_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_census_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_disappearing_server_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_simple_delayed_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_bad_hostname_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_after_accept_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_after_accept_and_writes_closed_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_after_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_before_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_in_a_vacuum_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_census_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_disappearing_server_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_delayed_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_bad_hostname_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_before_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_in_a_vacuum_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_census_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_disappearing_server_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_request_with_high_initial_sequence_number_unsecure_test
 
 buildtests_cxx: privatelibs_cxx $(BINDIR)/$(CONFIG)/async_end2end_test $(BINDIR)/$(CONFIG)/async_unary_ping_pong_test $(BINDIR)/$(CONFIG)/channel_arguments_test $(BINDIR)/$(CONFIG)/cli_call_test $(BINDIR)/$(CONFIG)/credentials_test $(BINDIR)/$(CONFIG)/cxx_time_test $(BINDIR)/$(CONFIG)/end2end_test $(BINDIR)/$(CONFIG)/generic_end2end_test $(BINDIR)/$(CONFIG)/grpc_cli $(BINDIR)/$(CONFIG)/interop_client $(BINDIR)/$(CONFIG)/interop_server $(BINDIR)/$(CONFIG)/interop_test $(BINDIR)/$(CONFIG)/mock_test $(BINDIR)/$(CONFIG)/qps_test $(BINDIR)/$(CONFIG)/status_test $(BINDIR)/$(CONFIG)/sync_streaming_ping_pong_test $(BINDIR)/$(CONFIG)/sync_unary_ping_pong_test $(BINDIR)/$(CONFIG)/thread_pool_test
 
@@ -1263,8 +1259,8 @@
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_metadata_and_payload_test || ( echo test chttp2_fake_security_request_response_with_metadata_and_payload_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fake_security_request_response_with_payload_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_payload_test || ( echo test chttp2_fake_security_request_response_with_payload_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_fake_security_request_response_with_trailing_metadata_and_payload_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_trailing_metadata_and_payload_test || ( echo test chttp2_fake_security_request_response_with_trailing_metadata_and_payload_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_fake_security_request_response_with_payload_and_call_creds_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_payload_and_call_creds_test || ( echo test chttp2_fake_security_request_response_with_payload_and_call_creds_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fake_security_request_with_large_metadata_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_with_large_metadata_test || ( echo test chttp2_fake_security_request_with_large_metadata_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fake_security_request_with_payload_test"
@@ -1317,8 +1313,8 @@
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_metadata_and_payload_test || ( echo test chttp2_fullstack_request_response_with_metadata_and_payload_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_request_response_with_payload_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_test || ( echo test chttp2_fullstack_request_response_with_payload_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_fullstack_request_response_with_trailing_metadata_and_payload_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_trailing_metadata_and_payload_test || ( echo test chttp2_fullstack_request_response_with_trailing_metadata_and_payload_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_fullstack_request_response_with_payload_and_call_creds_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_and_call_creds_test || ( echo test chttp2_fullstack_request_response_with_payload_and_call_creds_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_request_with_large_metadata_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_large_metadata_test || ( echo test chttp2_fullstack_request_with_large_metadata_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_request_with_payload_test"
@@ -1371,8 +1367,8 @@
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_metadata_and_payload_test || ( echo test chttp2_fullstack_uds_request_response_with_metadata_and_payload_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_request_response_with_payload_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_payload_test || ( echo test chttp2_fullstack_uds_request_response_with_payload_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_test || ( echo test chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_fullstack_uds_request_response_with_payload_and_call_creds_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_payload_and_call_creds_test || ( echo test chttp2_fullstack_uds_request_response_with_payload_and_call_creds_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_request_with_large_metadata_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_with_large_metadata_test || ( echo test chttp2_fullstack_uds_request_with_large_metadata_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_request_with_payload_test"
@@ -1425,8 +1421,8 @@
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_metadata_and_payload_test || ( echo test chttp2_simple_ssl_fullstack_request_response_with_metadata_and_payload_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_request_response_with_payload_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_payload_test || ( echo test chttp2_simple_ssl_fullstack_request_response_with_payload_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_request_response_with_trailing_metadata_and_payload_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_trailing_metadata_and_payload_test || ( echo test chttp2_simple_ssl_fullstack_request_response_with_trailing_metadata_and_payload_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_request_response_with_payload_and_call_creds_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_payload_and_call_creds_test || ( echo test chttp2_simple_ssl_fullstack_request_response_with_payload_and_call_creds_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_request_with_large_metadata_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_with_large_metadata_test || ( echo test chttp2_simple_ssl_fullstack_request_with_large_metadata_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_request_with_payload_test"
@@ -1479,8 +1475,8 @@
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_metadata_and_payload_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_metadata_and_payload_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_trailing_metadata_and_payload_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_trailing_metadata_and_payload_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_trailing_metadata_and_payload_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_and_call_creds_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_and_call_creds_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_and_call_creds_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_request_with_large_metadata_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_with_large_metadata_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_request_with_large_metadata_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_request_with_payload_test"
@@ -1533,8 +1529,8 @@
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_metadata_and_payload_test || ( echo test chttp2_socket_pair_request_response_with_metadata_and_payload_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_request_response_with_payload_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_test || ( echo test chttp2_socket_pair_request_response_with_payload_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_test || ( echo test chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_socket_pair_request_response_with_payload_and_call_creds_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_and_call_creds_test || ( echo test chttp2_socket_pair_request_response_with_payload_and_call_creds_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_request_with_large_metadata_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_large_metadata_test || ( echo test chttp2_socket_pair_request_with_large_metadata_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_request_with_payload_test"
@@ -1587,8 +1583,8 @@
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_and_call_creds_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_and_call_creds_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_and_call_creds_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_request_with_payload_test"
@@ -1641,8 +1637,6 @@
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_metadata_and_payload_unsecure_test || ( echo test chttp2_fullstack_request_response_with_metadata_and_payload_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_request_response_with_payload_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_unsecure_test || ( echo test chttp2_fullstack_request_response_with_payload_unsecure_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test || ( echo test chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_request_with_large_metadata_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_large_metadata_unsecure_test || ( echo test chttp2_fullstack_request_with_large_metadata_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_request_with_payload_unsecure_test"
@@ -1695,8 +1689,6 @@
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_metadata_and_payload_unsecure_test || ( echo test chttp2_fullstack_uds_request_response_with_metadata_and_payload_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_request_response_with_payload_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_payload_unsecure_test || ( echo test chttp2_fullstack_uds_request_response_with_payload_unsecure_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test || ( echo test chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_request_with_large_metadata_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_with_large_metadata_unsecure_test || ( echo test chttp2_fullstack_uds_request_with_large_metadata_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_request_with_payload_unsecure_test"
@@ -1749,8 +1741,6 @@
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_metadata_and_payload_unsecure_test || ( echo test chttp2_socket_pair_request_response_with_metadata_and_payload_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_request_response_with_payload_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_unsecure_test || ( echo test chttp2_socket_pair_request_response_with_payload_unsecure_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test || ( echo test chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_request_with_large_metadata_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_large_metadata_unsecure_test || ( echo test chttp2_socket_pair_request_with_large_metadata_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_request_with_payload_unsecure_test"
@@ -1803,8 +1793,6 @@
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_unsecure_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_unsecure_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_unsecure_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_request_with_payload_unsecure_test"
@@ -2423,6 +2411,7 @@
     src/core/httpcli/parser.c \
     src/core/security/auth.c \
     src/core/security/base64.c \
+    src/core/security/context.c \
     src/core/security/credentials.c \
     src/core/security/credentials_posix.c \
     src/core/security/credentials_win32.c \
@@ -4272,26 +4261,40 @@
 endif
 
 
-LIBEND2END_TEST_REQUEST_RESPONSE_WITH_TRAILING_METADATA_AND_PAYLOAD_SRC = \
-    test/core/end2end/tests/request_response_with_trailing_metadata_and_payload.c \
+LIBEND2END_TEST_REQUEST_RESPONSE_WITH_PAYLOAD_AND_CALL_CREDS_SRC = \
+    test/core/end2end/tests/request_response_with_payload_and_call_creds.c \
 
 
-LIBEND2END_TEST_REQUEST_RESPONSE_WITH_TRAILING_METADATA_AND_PAYLOAD_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBEND2END_TEST_REQUEST_RESPONSE_WITH_TRAILING_METADATA_AND_PAYLOAD_SRC))))
+LIBEND2END_TEST_REQUEST_RESPONSE_WITH_PAYLOAD_AND_CALL_CREDS_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBEND2END_TEST_REQUEST_RESPONSE_WITH_PAYLOAD_AND_CALL_CREDS_SRC))))
 
-$(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a: $(ZLIB_DEP) $(LIBEND2END_TEST_REQUEST_RESPONSE_WITH_TRAILING_METADATA_AND_PAYLOAD_OBJS)
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure libraries if you don't have OpenSSL with ALPN.
+
+$(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a: openssl_dep_error
+
+
+else
+
+
+$(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBEND2END_TEST_REQUEST_RESPONSE_WITH_PAYLOAD_AND_CALL_CREDS_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a
-	$(Q) $(AR) rcs $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBEND2END_TEST_REQUEST_RESPONSE_WITH_TRAILING_METADATA_AND_PAYLOAD_OBJS)
+	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a
+	$(Q) $(AR) rcs $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBEND2END_TEST_REQUEST_RESPONSE_WITH_PAYLOAD_AND_CALL_CREDS_OBJS)
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a
+	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a
 endif
 
 
 
 
+endif
+
+ifneq ($(NO_SECURE),true)
 ifneq ($(NO_DEPS),true)
--include $(LIBEND2END_TEST_REQUEST_RESPONSE_WITH_TRAILING_METADATA_AND_PAYLOAD_OBJS:.o=.dep)
+-include $(LIBEND2END_TEST_REQUEST_RESPONSE_WITH_PAYLOAD_AND_CALL_CREDS_OBJS:.o=.dep)
+endif
 endif
 
 
@@ -8135,14 +8138,14 @@
 
 # You can't build secure targets if you don't have OpenSSL with ALPN.
 
-$(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_trailing_metadata_and_payload_test: openssl_dep_error
+$(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_payload_and_call_creds_test: openssl_dep_error
 
 else
 
-$(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_trailing_metadata_and_payload_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fake_security.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+$(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_payload_and_call_creds_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fake_security.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fake_security.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_trailing_metadata_and_payload_test
+	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fake_security.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_payload_and_call_creds_test
 
 endif
 
@@ -8621,14 +8624,14 @@
 
 # You can't build secure targets if you don't have OpenSSL with ALPN.
 
-$(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_trailing_metadata_and_payload_test: openssl_dep_error
+$(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_and_call_creds_test: openssl_dep_error
 
 else
 
-$(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_trailing_metadata_and_payload_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+$(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_and_call_creds_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_trailing_metadata_and_payload_test
+	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_and_call_creds_test
 
 endif
 
@@ -9107,14 +9110,14 @@
 
 # You can't build secure targets if you don't have OpenSSL with ALPN.
 
-$(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_test: openssl_dep_error
+$(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_payload_and_call_creds_test: openssl_dep_error
 
 else
 
-$(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack_uds.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+$(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_payload_and_call_creds_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack_uds.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack_uds.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_test
+	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack_uds.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_payload_and_call_creds_test
 
 endif
 
@@ -9593,14 +9596,14 @@
 
 # You can't build secure targets if you don't have OpenSSL with ALPN.
 
-$(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_trailing_metadata_and_payload_test: openssl_dep_error
+$(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_payload_and_call_creds_test: openssl_dep_error
 
 else
 
-$(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_trailing_metadata_and_payload_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_simple_ssl_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+$(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_payload_and_call_creds_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_simple_ssl_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_simple_ssl_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_trailing_metadata_and_payload_test
+	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_simple_ssl_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_payload_and_call_creds_test
 
 endif
 
@@ -10079,14 +10082,14 @@
 
 # You can't build secure targets if you don't have OpenSSL with ALPN.
 
-$(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_trailing_metadata_and_payload_test: openssl_dep_error
+$(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_and_call_creds_test: openssl_dep_error
 
 else
 
-$(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_trailing_metadata_and_payload_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_simple_ssl_with_oauth2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+$(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_and_call_creds_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_simple_ssl_with_oauth2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_simple_ssl_with_oauth2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_trailing_metadata_and_payload_test
+	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_simple_ssl_with_oauth2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_and_call_creds_test
 
 endif
 
@@ -10565,14 +10568,14 @@
 
 # You can't build secure targets if you don't have OpenSSL with ALPN.
 
-$(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_test: openssl_dep_error
+$(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_and_call_creds_test: openssl_dep_error
 
 else
 
-$(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+$(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_and_call_creds_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_test
+	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_and_call_creds_test
 
 endif
 
@@ -11051,14 +11054,14 @@
 
 # You can't build secure targets if you don't have OpenSSL with ALPN.
 
-$(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_test: openssl_dep_error
+$(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_and_call_creds_test: openssl_dep_error
 
 else
 
-$(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair_one_byte_at_a_time.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+$(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_and_call_creds_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair_one_byte_at_a_time.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair_one_byte_at_a_time.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_test
+	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair_one_byte_at_a_time.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_payload_and_call_creds.a $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_and_call_creds_test
 
 endif
 
@@ -11323,14 +11326,6 @@
 
 
 
-$(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) -o $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test
-
-
-
-
 $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_large_metadata_unsecure_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_with_large_metadata.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
@@ -11539,14 +11534,6 @@
 
 
 
-$(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack_uds.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack_uds.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) -o $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test
-
-
-
-
 $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_request_with_large_metadata_unsecure_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_fullstack_uds.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_with_large_metadata.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
@@ -11755,14 +11742,6 @@
 
 
 
-$(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) -o $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test
-
-
-
-
 $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_large_metadata_unsecure_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_with_large_metadata.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
@@ -11971,14 +11950,6 @@
 
 
 
-$(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair_one_byte_at_a_time.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair_one_byte_at_a_time.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) -o $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test
-
-
-
-
 $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test:  $(LIBDIR)/$(CONFIG)/libend2end_fixture_chttp2_socket_pair_one_byte_at_a_time.a $(LIBDIR)/$(CONFIG)/libend2end_test_request_with_large_metadata.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
@@ -12033,6 +12004,7 @@
 src/core/httpcli/parser.c: $(OPENSSL_DEP)
 src/core/security/auth.c: $(OPENSSL_DEP)
 src/core/security/base64.c: $(OPENSSL_DEP)
+src/core/security/context.c: $(OPENSSL_DEP)
 src/core/security/credentials.c: $(OPENSSL_DEP)
 src/core/security/credentials_posix.c: $(OPENSSL_DEP)
 src/core/security/credentials_win32.c: $(OPENSSL_DEP)
diff --git a/build.json b/build.json
index cc2dfe8..c154f13 100644
--- a/build.json
+++ b/build.json
@@ -405,6 +405,7 @@
         "src/core/httpcli/parser.h",
         "src/core/security/auth.h",
         "src/core/security/base64.h",
+        "src/core/security/context.h",
         "src/core/security/credentials.h",
         "src/core/security/json_token.h",
         "src/core/security/secure_endpoint.h",
@@ -422,6 +423,7 @@
         "src/core/httpcli/parser.c",
         "src/core/security/auth.c",
         "src/core/security/base64.c",
+        "src/core/security/context.c",
         "src/core/security/credentials.c",
         "src/core/security/credentials_posix.c",
         "src/core/security/credentials_win32.c",
diff --git a/include/grpc/grpc_security.h b/include/grpc/grpc_security.h
index 586cfcf..2f9ec1c 100644
--- a/include/grpc/grpc_security.h
+++ b/include/grpc/grpc_security.h
@@ -184,6 +184,13 @@
 int grpc_server_add_secure_http2_port(grpc_server *server, const char *addr,
                                       grpc_server_credentials *creds);
 
+/* --- Call specific credentials. --- */
+
+/* Sets a credentials to a call. Can only be called on the client side before
+   grpc_call_start_batch. */
+grpc_call_error grpc_call_set_credentials(grpc_call *call,
+                                          grpc_credentials *creds);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/core/security/auth.c b/src/core/security/auth.c
index 2322c12..7fcedac 100644
--- a/src/core/security/auth.c
+++ b/src/core/security/auth.c
@@ -40,6 +40,7 @@
 
 #include "src/core/support/string.h"
 #include "src/core/channel/channel_stack.h"
+#include "src/core/security/context.h"
 #include "src/core/security/security_connector.h"
 #include "src/core/security/credentials.h"
 #include "src/core/surface/call.h"
@@ -67,6 +68,15 @@
   grpc_mdstr *status_key;
 } channel_data;
 
+static void bubble_up_error(grpc_call_element *elem, const char *error_msg) {
+  call_data *calld = elem->call_data;
+  channel_data *chand = elem->channel_data;
+  grpc_transport_op_add_cancellation(
+      &calld->op, GRPC_STATUS_UNAUTHENTICATED,
+      grpc_mdstr_from_string(chand->md_ctx, error_msg));
+  grpc_call_next_op(elem, &calld->op);
+}
+
 static void on_credentials_metadata(void *user_data, grpc_mdelem **md_elems,
                                     size_t num_md,
                                     grpc_credentials_status status) {
@@ -75,6 +85,10 @@
   grpc_transport_op *op = &calld->op;
   grpc_metadata_batch *mdb;
   size_t i;
+  if (status != GRPC_CREDENTIALS_OK) {
+    bubble_up_error(elem, "Credentials failed to get metadata.");
+    return;
+  }
   GPR_ASSERT(num_md <= MAX_CREDENTIALS_METADATA_COUNT);
   GPR_ASSERT(op->send_ops && op->send_ops->nops > calld->op_md_idx &&
              op->send_ops->ops[calld->op_md_idx].type == GRPC_OP_METADATA);
@@ -108,37 +122,48 @@
 
 static void send_security_metadata(grpc_call_element *elem,
                                    grpc_transport_op *op) {
-  /* grab pointers to our data from the call element */
   call_data *calld = elem->call_data;
-  channel_data *channeld = elem->channel_data;
-
+  channel_data *chand = elem->channel_data;
+  grpc_client_security_context *ctx =
+      (grpc_client_security_context *)op->context[GRPC_CONTEXT_SECURITY];
+  char *service_url = NULL;
   grpc_credentials *channel_creds =
-      channeld->security_connector->request_metadata_creds;
-  /* TODO(jboeuf):
-     Decide on the policy in this case:
-     - populate both channel and call?
-     - the call takes precedence over the channel?
-     - leave this decision up to the channel credentials?  */
-  if (calld->creds != NULL) {
-    gpr_log(GPR_ERROR, "Ignoring per call credentials for now.");
-  }
-  if (channel_creds != NULL &&
-      grpc_credentials_has_request_metadata(channel_creds)) {
-    char *service_url =
-        build_service_url(channeld->security_connector->base.url_scheme, calld);
-    calld->op = *op; /* Copy op (originates from the caller's stack). */
-    grpc_credentials_get_request_metadata(channel_creds, service_url,
-                                          on_credentials_metadata, elem);
-    gpr_free(service_url);
-  } else {
+      chand->security_connector->request_metadata_creds;
+  int channel_creds_has_md =
+      (channel_creds != NULL) &&
+      grpc_credentials_has_request_metadata(channel_creds);
+  int call_creds_has_md = (ctx != NULL) && (ctx->creds != NULL) &&
+                          grpc_credentials_has_request_metadata(ctx->creds);
+
+  if (!channel_creds_has_md && !call_creds_has_md) {
+    /* Skip sending metadata altogether. */
     grpc_call_next_op(elem, op);
+    return;
   }
+
+  if (channel_creds_has_md && call_creds_has_md) {
+    calld->creds = grpc_composite_credentials_create(channel_creds, ctx->creds);
+    if (calld->creds == NULL) {
+      bubble_up_error(elem,
+                      "Incompatible credentials set on channel and call.");
+      return;
+    }
+  } else {
+    calld->creds =
+        grpc_credentials_ref(call_creds_has_md ? ctx->creds : channel_creds);
+  }
+
+  service_url =
+      build_service_url(chand->security_connector->base.url_scheme, calld);
+  calld->op = *op; /* Copy op (originates from the caller's stack). */
+  grpc_credentials_get_request_metadata(calld->creds, service_url,
+                                        on_credentials_metadata, elem);
+  gpr_free(service_url);
 }
 
 static void on_host_checked(void *user_data, grpc_security_status status) {
   grpc_call_element *elem = (grpc_call_element *)user_data;
   call_data *calld = elem->call_data;
-  channel_data *chand = elem->channel_data;
 
   if (status == GRPC_SECURITY_OK) {
     send_security_metadata(elem, &calld->op);
@@ -146,11 +171,8 @@
     char *error_msg;
     gpr_asprintf(&error_msg, "Invalid host %s set in :authority metadata.",
                  grpc_mdstr_as_c_string(calld->host));
-    grpc_transport_op_add_cancellation(
-        &calld->op, GRPC_STATUS_UNAUTHENTICATED,
-        grpc_mdstr_from_string(chand->md_ctx, error_msg));
+    bubble_up_error(elem, error_msg);
     gpr_free(error_msg);
-    grpc_call_next_op(elem, &calld->op);
   }
 }
 
@@ -163,7 +185,7 @@
                                     grpc_transport_op *op) {
   /* grab pointers to our data from the call element */
   call_data *calld = elem->call_data;
-  channel_data *channeld = elem->channel_data;
+  channel_data *chand = elem->channel_data;
   grpc_linked_mdelem *l;
   size_t i;
 
@@ -179,10 +201,10 @@
         grpc_mdelem *md = l->md;
         /* Pointer comparison is OK for md_elems created from the same context.
          */
-        if (md->key == channeld->authority_string) {
+        if (md->key == chand->authority_string) {
           if (calld->host != NULL) grpc_mdstr_unref(calld->host);
           calld->host = grpc_mdstr_ref(md->value);
-        } else if (md->key == channeld->path_string) {
+        } else if (md->key == chand->path_string) {
           if (calld->method != NULL) grpc_mdstr_unref(calld->method);
           calld->method = grpc_mdstr_ref(md->value);
         }
@@ -192,18 +214,15 @@
         const char *call_host = grpc_mdstr_as_c_string(calld->host);
         calld->op = *op; /* Copy op (originates from the caller's stack). */
         status = grpc_channel_security_connector_check_call_host(
-            channeld->security_connector, call_host, on_host_checked, elem);
+            chand->security_connector, call_host, on_host_checked, elem);
         if (status != GRPC_SECURITY_OK) {
           if (status == GRPC_SECURITY_ERROR) {
             char *error_msg;
             gpr_asprintf(&error_msg,
                          "Invalid host %s set in :authority metadata.",
                          call_host);
-            grpc_transport_op_add_cancellation(
-                &calld->op, GRPC_STATUS_UNAUTHENTICATED,
-                grpc_mdstr_from_string(channeld->md_ctx, error_msg));
+            bubble_up_error(elem, error_msg);
             gpr_free(error_msg);
-            grpc_call_next_op(elem, &calld->op);
           }
           return; /* early exit */
         }
@@ -228,8 +247,6 @@
 static void init_call_elem(grpc_call_element *elem,
                            const void *server_transport_data,
                            grpc_transport_op *initial_op) {
-  /* TODO(jboeuf):
-     Find a way to pass-in the credentials from the caller here.  */
   call_data *calld = elem->call_data;
   calld->creds = NULL;
   calld->host = NULL;
@@ -242,9 +259,7 @@
 /* Destructor for call_data */
 static void destroy_call_elem(grpc_call_element *elem) {
   call_data *calld = elem->call_data;
-  if (calld->creds != NULL) {
-    grpc_credentials_unref(calld->creds);
-  }
+  grpc_credentials_unref(calld->creds);
   if (calld->host != NULL) {
     grpc_mdstr_unref(calld->host);
   }
@@ -260,7 +275,7 @@
                               int is_last) {
   grpc_security_connector *ctx = grpc_find_security_connector_in_args(args);
   /* grab pointers to our data from the channel element */
-  channel_data *channeld = elem->channel_data;
+  channel_data *chand = elem->channel_data;
 
   /* The first and the last filters tend to be implemented differently to
      handle the case that there's no 'next' filter to call on the up or down
@@ -271,35 +286,35 @@
 
   /* initialize members */
   GPR_ASSERT(ctx->is_client_side);
-  channeld->security_connector =
+  chand->security_connector =
       (grpc_channel_security_connector *)grpc_security_connector_ref(ctx);
-  channeld->md_ctx = metadata_context;
-  channeld->authority_string =
-      grpc_mdstr_from_string(channeld->md_ctx, ":authority");
-  channeld->path_string = grpc_mdstr_from_string(channeld->md_ctx, ":path");
-  channeld->error_msg_key =
-      grpc_mdstr_from_string(channeld->md_ctx, "grpc-message");
-  channeld->status_key =
-      grpc_mdstr_from_string(channeld->md_ctx, "grpc-status");
+  chand->md_ctx = metadata_context;
+  chand->authority_string =
+      grpc_mdstr_from_string(chand->md_ctx, ":authority");
+  chand->path_string = grpc_mdstr_from_string(chand->md_ctx, ":path");
+  chand->error_msg_key =
+      grpc_mdstr_from_string(chand->md_ctx, "grpc-message");
+  chand->status_key =
+      grpc_mdstr_from_string(chand->md_ctx, "grpc-status");
 }
 
 /* Destructor for channel data */
 static void destroy_channel_elem(grpc_channel_element *elem) {
   /* grab pointers to our data from the channel element */
-  channel_data *channeld = elem->channel_data;
-  grpc_channel_security_connector *ctx = channeld->security_connector;
+  channel_data *chand = elem->channel_data;
+  grpc_channel_security_connector *ctx = chand->security_connector;
   if (ctx != NULL) grpc_security_connector_unref(&ctx->base);
-  if (channeld->authority_string != NULL) {
-    grpc_mdstr_unref(channeld->authority_string);
+  if (chand->authority_string != NULL) {
+    grpc_mdstr_unref(chand->authority_string);
   }
-  if (channeld->error_msg_key != NULL) {
-    grpc_mdstr_unref(channeld->error_msg_key);
+  if (chand->error_msg_key != NULL) {
+    grpc_mdstr_unref(chand->error_msg_key);
   }
-  if (channeld->status_key != NULL) {
-    grpc_mdstr_unref(channeld->status_key);
+  if (chand->status_key != NULL) {
+    grpc_mdstr_unref(chand->status_key);
   }
-  if (channeld->path_string != NULL) {
-    grpc_mdstr_unref(channeld->path_string);
+  if (chand->path_string != NULL) {
+    grpc_mdstr_unref(chand->path_string);
   }
 }
 
diff --git a/src/core/security/context.c b/src/core/security/context.c
new file mode 100644
index 0000000..a365002
--- /dev/null
+++ b/src/core/security/context.c
@@ -0,0 +1,79 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <string.h>
+
+#include "src/core/security/context.h"
+#include "src/core/surface/call.h"
+
+#include <grpc/grpc_security.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+grpc_call_error grpc_call_set_credentials(grpc_call *call,
+                                          grpc_credentials *creds) {
+  grpc_client_security_context *ctx = NULL;
+  if (!grpc_call_is_client(call)) {
+    gpr_log(GPR_ERROR, "Method is client-side only.");
+    return GRPC_CALL_ERROR_NOT_ON_SERVER;
+  }
+  if (creds != NULL && !grpc_credentials_has_request_metadata_only(creds)) {
+    gpr_log(GPR_ERROR, "Incompatible credentials to set on a call.");
+    return GRPC_CALL_ERROR;
+  }
+  ctx = (grpc_client_security_context *)grpc_call_context_get(
+      call, GRPC_CONTEXT_SECURITY);
+  if (ctx == NULL) {
+    ctx = grpc_client_security_context_create();
+    ctx->creds = grpc_credentials_ref(creds);
+    grpc_call_context_set(call, GRPC_CONTEXT_SECURITY, ctx,
+                          grpc_client_security_context_destroy);
+  } else {
+    grpc_credentials_unref(ctx->creds);
+    ctx->creds = grpc_credentials_ref(creds);
+  }
+  return GRPC_CALL_OK;
+}
+
+grpc_client_security_context *grpc_client_security_context_create(void) {
+  grpc_client_security_context *ctx =
+      gpr_malloc(sizeof(grpc_client_security_context));
+  memset(ctx, 0, sizeof(grpc_client_security_context));
+  return ctx;
+}
+
+void grpc_client_security_context_destroy(void *ctx) {
+  grpc_client_security_context *c = (grpc_client_security_context *)ctx;
+  grpc_credentials_unref(c->creds);
+  gpr_free(ctx);
+}
diff --git a/src/core/security/context.h b/src/core/security/context.h
new file mode 100644
index 0000000..3e46c37
--- /dev/null
+++ b/src/core/security/context.h
@@ -0,0 +1,48 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_INTERNAL_CORE_SECURITY_CONTEXT_H
+#define GRPC_INTERNAL_CORE_SECURITY_CONTEXT_H
+
+#include "src/core/security/credentials.h"
+
+/* Security context attached to a client-side call. */
+typedef struct {
+  grpc_credentials *creds;
+} grpc_client_security_context;
+
+grpc_client_security_context *grpc_client_security_context_create(void);
+void grpc_client_security_context_destroy(void *ctx);
+
+#endif  /* GRPC_INTERNAL_CORE_SECURITY_CONTEXT_H */
+
diff --git a/src/core/surface/call.c b/src/core/surface/call.c
index aa58fa1..e117f27 100644
--- a/src/core/surface/call.c
+++ b/src/core/surface/call.c
@@ -1302,3 +1302,5 @@
 void *grpc_call_context_get(grpc_call *call, grpc_context_index elem) {
   return call->context[elem];
 }
+
+gpr_uint8 grpc_call_is_client(grpc_call *call) { return call->is_client; }
diff --git a/src/core/surface/call.h b/src/core/surface/call.h
index 18a77ba..02378b6 100644
--- a/src/core/surface/call.h
+++ b/src/core/surface/call.h
@@ -98,12 +98,14 @@
 void grpc_call_internal_ref(grpc_call *call, const char *reason);
 void grpc_call_internal_unref(grpc_call *call, const char *reason, int allow_immediate_deletion);
 #define GRPC_CALL_INTERNAL_REF(call, reason) grpc_call_internal_ref(call, reason)
-#define GRPC_CALL_INTERNAL_UNREF(call, reason, allow_immediate_deletion) grpc_call_internal_unref(call, reason, allow_immediate_deletion)
+#define GRPC_CALL_INTERNAL_UNREF(call, reason, allow_immediate_deletion) \
+  grpc_call_internal_unref(call, reason, allow_immediate_deletion)
 #else
 void grpc_call_internal_ref(grpc_call *call);
 void grpc_call_internal_unref(grpc_call *call, int allow_immediate_deletion);
 #define GRPC_CALL_INTERNAL_REF(call, reason) grpc_call_internal_ref(call)
-#define GRPC_CALL_INTERNAL_UNREF(call, reason, allow_immediate_deletion) grpc_call_internal_unref(call, allow_immediate_deletion)
+#define GRPC_CALL_INTERNAL_UNREF(call, reason, allow_immediate_deletion) \
+  grpc_call_internal_unref(call, allow_immediate_deletion)
 #endif
 
 grpc_call_error grpc_call_start_ioreq_and_call_back(
@@ -131,4 +133,6 @@
 #define GRPC_CALL_LOG_BATCH(sev, call, ops, nops, tag) \
   if (grpc_trace_batch) grpc_call_log_batch(sev, call, ops, nops, tag)
 
+gpr_uint8 grpc_call_is_client(grpc_call *call);
+
 #endif /* GRPC_INTERNAL_CORE_SURFACE_CALL_H */
diff --git a/test/core/end2end/end2end_tests.h b/test/core/end2end/end2end_tests.h
index 41c6e2e..a61c725 100644
--- a/test/core/end2end/end2end_tests.h
+++ b/test/core/end2end/end2end_tests.h
@@ -41,6 +41,7 @@
 
 #define FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION 1
 #define FEATURE_MASK_SUPPORTS_HOSTNAME_VERIFICATION 2
+#define FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS 4
 
 struct grpc_end2end_test_fixture {
   grpc_completion_queue *server_cq;
diff --git a/test/core/end2end/fixtures/chttp2_fake_security.c b/test/core/end2end/fixtures/chttp2_fake_security.c
index 929f1f5..c1ac916 100644
--- a/test/core/end2end/fixtures/chttp2_fake_security.c
+++ b/test/core/end2end/fixtures/chttp2_fake_security.c
@@ -112,7 +112,9 @@
 /* All test configurations */
 
 static grpc_end2end_test_config configs[] = {
-    {"chttp2/fake_secure_fullstack", FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION,
+    {"chttp2/fake_secure_fullstack",
+     FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
+         FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS,
      chttp2_create_fixture_secure_fullstack,
      chttp2_init_client_fake_secure_fullstack,
      chttp2_init_server_fake_secure_fullstack,
diff --git a/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack.c b/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack.c
index 9c4086d..3d6c0cf 100644
--- a/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack.c
+++ b/test/core/end2end/fixtures/chttp2_simple_ssl_fullstack.c
@@ -124,7 +124,8 @@
 static grpc_end2end_test_config configs[] = {
     {"chttp2/simple_ssl_fullstack",
      FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
-         FEATURE_MASK_SUPPORTS_HOSTNAME_VERIFICATION,
+         FEATURE_MASK_SUPPORTS_HOSTNAME_VERIFICATION |
+         FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS,
      chttp2_create_fixture_secure_fullstack,
      chttp2_init_client_simple_ssl_secure_fullstack,
      chttp2_init_server_simple_ssl_secure_fullstack,
diff --git a/test/core/end2end/fixtures/chttp2_simple_ssl_with_oauth2_fullstack.c b/test/core/end2end/fixtures/chttp2_simple_ssl_with_oauth2_fullstack.c
index e9e1c5f..b57872f 100644
--- a/test/core/end2end/fixtures/chttp2_simple_ssl_with_oauth2_fullstack.c
+++ b/test/core/end2end/fixtures/chttp2_simple_ssl_with_oauth2_fullstack.c
@@ -129,7 +129,8 @@
 static grpc_end2end_test_config configs[] = {
     {"chttp2/simple_ssl_with_oauth2_fullstack",
      FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
-         FEATURE_MASK_SUPPORTS_HOSTNAME_VERIFICATION,
+         FEATURE_MASK_SUPPORTS_HOSTNAME_VERIFICATION |
+         FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS,
      chttp2_create_fixture_secure_fullstack,
      chttp2_init_client_simple_ssl_with_oauth2_secure_fullstack,
      chttp2_init_server_simple_ssl_secure_fullstack,
diff --git a/test/core/end2end/gen_build_json.py b/test/core/end2end/gen_build_json.py
index dfe9c1d..934e935 100755
--- a/test/core/end2end/gen_build_json.py
+++ b/test/core/end2end/gen_build_json.py
@@ -46,35 +46,40 @@
     'chttp2_socket_pair_one_byte_at_a_time': False,
 }
 
-# maps tests names to whether they run fine or not (aka, not flaky)
+class TestOptions(object):
+  def __init__(self, flaky=False, secure=False):
+    self.flaky = flaky
+    self.secure = secure
+
+# maps test names to options
 END2END_TESTS = {
-    'bad_hostname': True,
-    'cancel_after_accept': False,
-    'cancel_after_accept_and_writes_closed': True,
-    'cancel_after_invoke': True,
-    'cancel_before_invoke': True,
-    'cancel_in_a_vacuum': True,
-    'census_simple_request': True,
-    'disappearing_server': True,
-    'early_server_shutdown_finishes_inflight_calls': True,
-    'early_server_shutdown_finishes_tags': True,
-    'empty_batch': True,
-    'graceful_server_shutdown': True,
-    'invoke_large_request': False,
-    'max_concurrent_streams': True,
-    'max_message_length': True,
-    'no_op': True,
-    'ping_pong_streaming': True,
-    'registered_call': True,
-    'request_response_with_binary_metadata_and_payload': True,
-    'request_response_with_metadata_and_payload': True,
-    'request_response_with_payload': True,
-    'request_response_with_trailing_metadata_and_payload': True,
-    'request_with_large_metadata': True,
-    'request_with_payload': True,
-    'simple_delayed_request': True,
-    'simple_request': True,
-    'simple_request_with_high_initial_sequence_number': True,
+    'bad_hostname': TestOptions(),
+    'cancel_after_accept': TestOptions(flaky=True),
+    'cancel_after_accept_and_writes_closed': TestOptions(),
+    'cancel_after_invoke': TestOptions(),
+    'cancel_before_invoke': TestOptions(),
+    'cancel_in_a_vacuum': TestOptions(),
+    'census_simple_request': TestOptions(),
+    'disappearing_server': TestOptions(),
+    'early_server_shutdown_finishes_inflight_calls': TestOptions(),
+    'early_server_shutdown_finishes_tags': TestOptions(),
+    'empty_batch': TestOptions(),
+    'graceful_server_shutdown': TestOptions(),
+    'invoke_large_request': TestOptions(flaky=False),
+    'max_concurrent_streams': TestOptions(),
+    'max_message_length': TestOptions(),
+    'no_op': TestOptions(),
+    'ping_pong_streaming': TestOptions(),
+    'registered_call': TestOptions(),
+    'request_response_with_binary_metadata_and_payload': TestOptions(),
+    'request_response_with_metadata_and_payload': TestOptions(),
+    'request_response_with_payload': TestOptions(),
+    'request_response_with_payload_and_call_creds': TestOptions(secure=True),
+    'request_with_large_metadata': TestOptions(),
+    'request_with_payload': TestOptions(),
+    'simple_delayed_request': TestOptions(),
+    'simple_request': TestOptions(),
+    'simple_request_with_high_initial_sequence_number': TestOptions(),
 }
 
 
@@ -94,7 +99,7 @@
               'name': 'end2end_test_%s' % t,
               'build': 'private',
               'language': 'c',
-              'secure': 'no',
+              'secure': 'check' if END2END_TESTS[t].secure else 'no',
               'src': ['test/core/end2end/tests/%s.c' % t],
               'headers': ['test/core/end2end/tests/cancel_test_helpers.h']
           }
@@ -116,7 +121,7 @@
               'build': 'test',
               'language': 'c',
               'src': [],
-              'flaky': not END2END_TESTS[t],
+              'flaky': END2END_TESTS[t].flaky,
               'deps': [
                   'end2end_fixture_%s' % f,
                   'end2end_test_%s' % t,
@@ -146,7 +151,7 @@
               ]
           }
       for f in sorted(END2END_FIXTURES.keys()) if not END2END_FIXTURES[f]
-      for t in sorted(END2END_TESTS.keys())]}
+      for t in sorted(END2END_TESTS.keys()) if not END2END_TESTS[t].secure]}
   print simplejson.dumps(json, sort_keys=True, indent=2 * ' ')
 
 
diff --git a/test/core/end2end/tests/request_response_with_payload_and_call_creds.c b/test/core/end2end/tests/request_response_with_payload_and_call_creds.c
new file mode 100644
index 0000000..e762a25
--- /dev/null
+++ b/test/core/end2end/tests/request_response_with_payload_and_call_creds.c
@@ -0,0 +1,338 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/core/end2end/end2end_tests.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <grpc/grpc_security.h>
+#include <grpc/byte_buffer.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/time.h>
+#include <grpc/support/useful.h>
+#include "test/core/end2end/cq_verifier.h"
+#include "src/core/security/credentials.h"
+#include "src/core/support/string.h"
+
+static const char iam_token[] = "token";
+static const char iam_selector[] = "selector";
+static const char overridden_iam_token[] = "overridden_token";
+static const char overridden_iam_selector[] = "overridden_selector";
+
+typedef enum {
+  NONE,
+  OVERRIDE,
+  DELETE
+} override_mode;
+
+enum { TIMEOUT = 200000 };
+
+static void *tag(gpr_intptr t) { return (void *)t; }
+
+static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
+                                            const char *test_name,
+                                            grpc_channel_args *client_args,
+                                            grpc_channel_args *server_args) {
+  grpc_end2end_test_fixture f;
+  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  f = config.create_fixture(client_args, server_args);
+  config.init_client(&f, client_args);
+  config.init_server(&f, server_args);
+  return f;
+}
+
+static gpr_timespec n_seconds_time(int n) {
+  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+}
+
+static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
+
+static void drain_cq(grpc_completion_queue *cq) {
+  grpc_event *ev;
+  grpc_completion_type type;
+  do {
+    ev = grpc_completion_queue_next(cq, five_seconds_time());
+    GPR_ASSERT(ev);
+    type = ev->type;
+    grpc_event_finish(ev);
+  } while (type != GRPC_QUEUE_SHUTDOWN);
+}
+
+static void shutdown_server(grpc_end2end_test_fixture *f) {
+  if (!f->server) return;
+  grpc_server_shutdown(f->server);
+  grpc_server_destroy(f->server);
+  f->server = NULL;
+}
+
+static void shutdown_client(grpc_end2end_test_fixture *f) {
+  if (!f->client) return;
+  grpc_channel_destroy(f->client);
+  f->client = NULL;
+}
+
+static void end_test(grpc_end2end_test_fixture *f) {
+  shutdown_server(f);
+  shutdown_client(f);
+
+  grpc_completion_queue_shutdown(f->server_cq);
+  drain_cq(f->server_cq);
+  grpc_completion_queue_destroy(f->server_cq);
+  grpc_completion_queue_shutdown(f->client_cq);
+  drain_cq(f->client_cq);
+  grpc_completion_queue_destroy(f->client_cq);
+}
+
+static void test_call_creds_failure(grpc_end2end_test_config config) {
+  grpc_call *c;
+  grpc_credentials *creds = NULL;
+  grpc_end2end_test_fixture f = begin_test(config, __FUNCTION__, NULL, NULL);
+  gpr_timespec deadline = five_seconds_time();
+  c = grpc_channel_create_call(f.client, f.client_cq, "/foo",
+                               "foo.test.google.fr", deadline);
+  GPR_ASSERT(c);
+
+  /* Try with credentials unfit to be set on a call (channel creds). */
+  creds = grpc_fake_transport_security_credentials_create();
+  GPR_ASSERT(grpc_call_set_credentials(c, creds) != GRPC_CALL_OK);
+  grpc_credentials_release(creds);
+
+  end_test(&f);
+  config.tear_down_data(&f);
+}
+
+static void request_response_with_payload_and_call_creds(
+    const char *test_name, grpc_end2end_test_config config,
+    override_mode mode) {
+  grpc_call *c;
+  grpc_call *s;
+  gpr_slice request_payload_slice = gpr_slice_from_copied_string("hello world");
+  gpr_slice response_payload_slice = gpr_slice_from_copied_string("hello you");
+  grpc_byte_buffer *request_payload =
+      grpc_byte_buffer_create(&request_payload_slice, 1);
+  grpc_byte_buffer *response_payload =
+      grpc_byte_buffer_create(&response_payload_slice, 1);
+  gpr_timespec deadline = five_seconds_time();
+
+  grpc_end2end_test_fixture f = begin_test(config, test_name, NULL, NULL);
+  cq_verifier *v_client = cq_verifier_create(f.client_cq);
+  cq_verifier *v_server = cq_verifier_create(f.server_cq);
+  grpc_op ops[6];
+  grpc_op *op;
+  grpc_metadata_array initial_metadata_recv;
+  grpc_metadata_array trailing_metadata_recv;
+  grpc_metadata_array request_metadata_recv;
+  grpc_byte_buffer *request_payload_recv = NULL;
+  grpc_byte_buffer *response_payload_recv = NULL;
+  grpc_call_details call_details;
+  grpc_status_code status;
+  char *details = NULL;
+  size_t details_capacity = 0;
+  int was_cancelled = 2;
+  grpc_credentials *creds = NULL;
+
+  c = grpc_channel_create_call(f.client, f.client_cq, "/foo",
+                               "foo.test.google.fr", deadline);
+  GPR_ASSERT(c);
+  creds = grpc_iam_credentials_create(iam_token, iam_selector);
+  GPR_ASSERT(creds != NULL);
+  GPR_ASSERT(grpc_call_set_credentials(c, creds) == GRPC_CALL_OK);
+  switch (mode) {
+    case NONE:
+      break;
+    case OVERRIDE:
+      grpc_credentials_release(creds);
+      creds = grpc_iam_credentials_create(overridden_iam_token,
+                                          overridden_iam_selector);
+      GPR_ASSERT(creds != NULL);
+      GPR_ASSERT(grpc_call_set_credentials(c, creds) == GRPC_CALL_OK);
+      break;
+    case DELETE:
+      GPR_ASSERT(grpc_call_set_credentials(c, NULL) == GRPC_CALL_OK);
+      break;
+  }
+  grpc_credentials_release(creds);
+
+  grpc_metadata_array_init(&initial_metadata_recv);
+  grpc_metadata_array_init(&trailing_metadata_recv);
+  grpc_metadata_array_init(&request_metadata_recv);
+  grpc_call_details_init(&call_details);
+
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op++;
+  op->op = GRPC_OP_SEND_MESSAGE;
+  op->data.send_message = request_payload;
+  op++;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op++;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op++;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message = &response_payload_recv;
+  op++;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
+  op->data.recv_status_on_client.status = &status;
+  op->data.recv_status_on_client.status_details = &details;
+  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
+  op++;
+  GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(c, ops, op - ops, tag(1)));
+
+  GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(f.server, &s,
+                                                      &call_details,
+                                                      &request_metadata_recv,
+                                                      f.server_cq, tag(101)));
+  cq_expect_completion(v_server, tag(101), GRPC_OP_OK);
+  cq_verify(v_server);
+
+  /* Cannot set creds on the server call object. */
+  GPR_ASSERT(grpc_call_set_credentials(s, NULL) != GRPC_CALL_OK);
+
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op++;
+  op->op = GRPC_OP_SEND_MESSAGE;
+  op->data.send_message = response_payload;
+  op++;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.trailing_metadata_count = 0;
+  op->data.send_status_from_server.status = GRPC_STATUS_OK;
+  op->data.send_status_from_server.status_details = "xyz";
+  op++;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message = &request_payload_recv;
+  op++;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = &was_cancelled;
+  op++;
+  GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(s, ops, op - ops, tag(102)));
+
+  cq_expect_completion(v_server, tag(102), GRPC_OP_OK);
+  cq_verify(v_server);
+
+  cq_expect_completion(v_client, tag(1), GRPC_OP_OK);
+  cq_verify(v_client);
+
+  GPR_ASSERT(status == GRPC_STATUS_OK);
+  GPR_ASSERT(0 == strcmp(details, "xyz"));
+  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  GPR_ASSERT(was_cancelled == 0);
+  GPR_ASSERT(byte_buffer_eq_string(request_payload_recv, "hello world"));
+  GPR_ASSERT(byte_buffer_eq_string(response_payload_recv, "hello you"));
+
+  switch (mode) {
+    case NONE:
+      GPR_ASSERT(contains_metadata(&request_metadata_recv,
+                                   GRPC_IAM_AUTHORIZATION_TOKEN_METADATA_KEY,
+                                   iam_token));
+      GPR_ASSERT(contains_metadata(&request_metadata_recv,
+                                   GRPC_IAM_AUTHORITY_SELECTOR_METADATA_KEY,
+                                   iam_selector));
+      break;
+    case OVERRIDE:
+      GPR_ASSERT(contains_metadata(&request_metadata_recv,
+                                   GRPC_IAM_AUTHORIZATION_TOKEN_METADATA_KEY,
+                                   overridden_iam_token));
+      GPR_ASSERT(contains_metadata(&request_metadata_recv,
+                                   GRPC_IAM_AUTHORITY_SELECTOR_METADATA_KEY,
+                                   overridden_iam_selector));
+      break;
+    case DELETE:
+      GPR_ASSERT(!contains_metadata(&request_metadata_recv,
+                                    GRPC_IAM_AUTHORIZATION_TOKEN_METADATA_KEY,
+                                    iam_token));
+      GPR_ASSERT(!contains_metadata(&request_metadata_recv,
+                                    GRPC_IAM_AUTHORITY_SELECTOR_METADATA_KEY,
+                                    iam_selector));
+      GPR_ASSERT(!contains_metadata(&request_metadata_recv,
+                                    GRPC_IAM_AUTHORIZATION_TOKEN_METADATA_KEY,
+                                    overridden_iam_token));
+      GPR_ASSERT(!contains_metadata(&request_metadata_recv,
+                                    GRPC_IAM_AUTHORITY_SELECTOR_METADATA_KEY,
+                                    overridden_iam_selector));
+      break;
+  }
+
+  gpr_free(details);
+  grpc_metadata_array_destroy(&initial_metadata_recv);
+  grpc_metadata_array_destroy(&trailing_metadata_recv);
+  grpc_metadata_array_destroy(&request_metadata_recv);
+  grpc_call_details_destroy(&call_details);
+
+  grpc_call_destroy(c);
+  grpc_call_destroy(s);
+
+  cq_verifier_destroy(v_client);
+  cq_verifier_destroy(v_server);
+
+  grpc_byte_buffer_destroy(request_payload);
+  grpc_byte_buffer_destroy(response_payload);
+  grpc_byte_buffer_destroy(request_payload_recv);
+  grpc_byte_buffer_destroy(response_payload_recv);
+
+  end_test(&f);
+  config.tear_down_data(&f);
+}
+
+void test_request_response_with_payload_and_call_creds(
+    grpc_end2end_test_config config) {
+  request_response_with_payload_and_call_creds(__FUNCTION__, config, NONE);
+}
+
+void test_request_response_with_payload_and_overridden_call_creds(
+    grpc_end2end_test_config config) {
+  request_response_with_payload_and_call_creds(__FUNCTION__, config, OVERRIDE);
+}
+
+void test_request_response_with_payload_and_deleted_call_creds(
+    grpc_end2end_test_config config) {
+  request_response_with_payload_and_call_creds(__FUNCTION__, config, DELETE);
+}
+
+void grpc_end2end_tests(grpc_end2end_test_config config) {
+  if (config.feature_mask & FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS) {
+    test_call_creds_failure(config);
+    test_request_response_with_payload_and_call_creds(config);
+    test_request_response_with_payload_and_overridden_call_creds(config);
+    test_request_response_with_payload_and_deleted_call_creds(config);
+  }
+}
+
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 8c17c27..8c6d787 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -802,7 +802,7 @@
     ]
   }, 
   {
-    "flaky": true, 
+    "flaky": false, 
     "language": "c", 
     "name": "chttp2_fake_security_invoke_large_request_test", 
     "platforms": [
@@ -885,7 +885,7 @@
   {
     "flaky": false, 
     "language": "c", 
-    "name": "chttp2_fake_security_request_response_with_trailing_metadata_and_payload_test", 
+    "name": "chttp2_fake_security_request_response_with_payload_and_call_creds_test", 
     "platforms": [
       "windows", 
       "posix"
@@ -1045,7 +1045,7 @@
     ]
   }, 
   {
-    "flaky": true, 
+    "flaky": false, 
     "language": "c", 
     "name": "chttp2_fullstack_invoke_large_request_test", 
     "platforms": [
@@ -1128,7 +1128,7 @@
   {
     "flaky": false, 
     "language": "c", 
-    "name": "chttp2_fullstack_request_response_with_trailing_metadata_and_payload_test", 
+    "name": "chttp2_fullstack_request_response_with_payload_and_call_creds_test", 
     "platforms": [
       "windows", 
       "posix"
@@ -1288,7 +1288,7 @@
     ]
   }, 
   {
-    "flaky": true, 
+    "flaky": false, 
     "language": "c", 
     "name": "chttp2_fullstack_uds_invoke_large_request_test", 
     "platforms": [
@@ -1371,7 +1371,7 @@
   {
     "flaky": false, 
     "language": "c", 
-    "name": "chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_test", 
+    "name": "chttp2_fullstack_uds_request_response_with_payload_and_call_creds_test", 
     "platforms": [
       "windows", 
       "posix"
@@ -1531,7 +1531,7 @@
     ]
   }, 
   {
-    "flaky": true, 
+    "flaky": false, 
     "language": "c", 
     "name": "chttp2_simple_ssl_fullstack_invoke_large_request_test", 
     "platforms": [
@@ -1614,7 +1614,7 @@
   {
     "flaky": false, 
     "language": "c", 
-    "name": "chttp2_simple_ssl_fullstack_request_response_with_trailing_metadata_and_payload_test", 
+    "name": "chttp2_simple_ssl_fullstack_request_response_with_payload_and_call_creds_test", 
     "platforms": [
       "windows", 
       "posix"
@@ -1774,7 +1774,7 @@
     ]
   }, 
   {
-    "flaky": true, 
+    "flaky": false, 
     "language": "c", 
     "name": "chttp2_simple_ssl_with_oauth2_fullstack_invoke_large_request_test", 
     "platforms": [
@@ -1857,7 +1857,7 @@
   {
     "flaky": false, 
     "language": "c", 
-    "name": "chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_trailing_metadata_and_payload_test", 
+    "name": "chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_and_call_creds_test", 
     "platforms": [
       "windows", 
       "posix"
@@ -2017,7 +2017,7 @@
     ]
   }, 
   {
-    "flaky": true, 
+    "flaky": false, 
     "language": "c", 
     "name": "chttp2_socket_pair_invoke_large_request_test", 
     "platforms": [
@@ -2100,7 +2100,7 @@
   {
     "flaky": false, 
     "language": "c", 
-    "name": "chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_test", 
+    "name": "chttp2_socket_pair_request_response_with_payload_and_call_creds_test", 
     "platforms": [
       "windows", 
       "posix"
@@ -2260,7 +2260,7 @@
     ]
   }, 
   {
-    "flaky": true, 
+    "flaky": false, 
     "language": "c", 
     "name": "chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_test", 
     "platforms": [
@@ -2343,7 +2343,7 @@
   {
     "flaky": false, 
     "language": "c", 
-    "name": "chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_test", 
+    "name": "chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_and_call_creds_test", 
     "platforms": [
       "windows", 
       "posix"
@@ -2586,15 +2586,6 @@
   {
     "flaky": false, 
     "language": "c", 
-    "name": "chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test", 
-    "platforms": [
-      "windows", 
-      "posix"
-    ]
-  }, 
-  {
-    "flaky": false, 
-    "language": "c", 
     "name": "chttp2_fullstack_request_with_large_metadata_unsecure_test", 
     "platforms": [
       "windows", 
@@ -2829,15 +2820,6 @@
   {
     "flaky": false, 
     "language": "c", 
-    "name": "chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test", 
-    "platforms": [
-      "windows", 
-      "posix"
-    ]
-  }, 
-  {
-    "flaky": false, 
-    "language": "c", 
     "name": "chttp2_fullstack_uds_request_with_large_metadata_unsecure_test", 
     "platforms": [
       "windows", 
@@ -3072,15 +3054,6 @@
   {
     "flaky": false, 
     "language": "c", 
-    "name": "chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test", 
-    "platforms": [
-      "windows", 
-      "posix"
-    ]
-  }, 
-  {
-    "flaky": false, 
-    "language": "c", 
     "name": "chttp2_socket_pair_request_with_large_metadata_unsecure_test", 
     "platforms": [
       "windows", 
@@ -3315,15 +3288,6 @@
   {
     "flaky": false, 
     "language": "c", 
-    "name": "chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test", 
-    "platforms": [
-      "windows", 
-      "posix"
-    ]
-  }, 
-  {
-    "flaky": false, 
-    "language": "c", 
     "name": "chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test", 
     "platforms": [
       "windows", 
diff --git a/vsprojects/Grpc.mak b/vsprojects/Grpc.mak
index 882f14b..e3d9637 100644
--- a/vsprojects/Grpc.mak
+++ b/vsprojects/Grpc.mak
@@ -58,7 +58,7 @@
 
 buildtests: buildtests_c buildtests_cxx
 
-buildtests_c: alarm_heap_test.exe alarm_list_test.exe alarm_test.exe alpn_test.exe bin_encoder_test.exe census_hash_table_test.exe census_statistics_multiple_writers_circular_buffer_test.exe census_statistics_multiple_writers_test.exe census_statistics_performance_test.exe census_statistics_quick_test.exe census_statistics_small_log_test.exe census_stub_test.exe census_window_stats_test.exe chttp2_status_conversion_test.exe chttp2_stream_encoder_test.exe chttp2_stream_map_test.exe fd_posix_test.exe fling_client.exe fling_server.exe fling_stream_test.exe fling_test.exe gpr_cancellable_test.exe gpr_cmdline_test.exe gpr_env_test.exe gpr_file_test.exe gpr_histogram_test.exe gpr_host_port_test.exe gpr_log_test.exe gpr_slice_buffer_test.exe gpr_slice_test.exe gpr_string_test.exe gpr_sync_test.exe gpr_thd_test.exe gpr_time_test.exe gpr_tls_test.exe gpr_useful_test.exe grpc_base64_test.exe grpc_byte_buffer_reader_test.exe grpc_channel_stack_test.exe grpc_completion_queue_test.exe grpc_credentials_test.exe grpc_json_token_test.exe grpc_stream_op_test.exe hpack_parser_test.exe hpack_table_test.exe httpcli_format_request_test.exe httpcli_parser_test.exe httpcli_test.exe json_rewrite.exe json_rewrite_test.exe json_test.exe lame_client_test.exe message_compress_test.exe multi_init_test.exe murmur_hash_test.exe no_server_test.exe poll_kick_posix_test.exe resolve_address_test.exe secure_endpoint_test.exe sockaddr_utils_test.exe tcp_client_posix_test.exe tcp_posix_test.exe tcp_server_posix_test.exe time_averaged_stats_test.exe time_test.exe timeout_encoding_test.exe timers_test.exe transport_metadata_test.exe transport_security_test.exe chttp2_fullstack_bad_hostname_unsecure_test.exe chttp2_fullstack_cancel_after_accept_unsecure_test.exe chttp2_fullstack_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_fullstack_cancel_after_invoke_unsecure_test.exe chttp2_fullstack_cancel_before_invoke_unsecure_test.exe chttp2_fullstack_cancel_in_a_vacuum_unsecure_test.exe chttp2_fullstack_census_simple_request_unsecure_test.exe chttp2_fullstack_disappearing_server_unsecure_test.exe chttp2_fullstack_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_fullstack_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_fullstack_empty_batch_unsecure_test.exe chttp2_fullstack_graceful_server_shutdown_unsecure_test.exe chttp2_fullstack_invoke_large_request_unsecure_test.exe chttp2_fullstack_max_concurrent_streams_unsecure_test.exe chttp2_fullstack_max_message_length_unsecure_test.exe chttp2_fullstack_no_op_unsecure_test.exe chttp2_fullstack_ping_pong_streaming_unsecure_test.exe chttp2_fullstack_registered_call_unsecure_test.exe chttp2_fullstack_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_fullstack_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_fullstack_request_response_with_payload_unsecure_test.exe chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test.exe chttp2_fullstack_request_with_large_metadata_unsecure_test.exe chttp2_fullstack_request_with_payload_unsecure_test.exe chttp2_fullstack_simple_delayed_request_unsecure_test.exe chttp2_fullstack_simple_request_unsecure_test.exe chttp2_fullstack_simple_request_with_high_initial_sequence_number_unsecure_test.exe chttp2_fullstack_uds_bad_hostname_unsecure_test.exe chttp2_fullstack_uds_cancel_after_accept_unsecure_test.exe chttp2_fullstack_uds_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_fullstack_uds_cancel_after_invoke_unsecure_test.exe chttp2_fullstack_uds_cancel_before_invoke_unsecure_test.exe chttp2_fullstack_uds_cancel_in_a_vacuum_unsecure_test.exe chttp2_fullstack_uds_census_simple_request_unsecure_test.exe chttp2_fullstack_uds_disappearing_server_unsecure_test.exe chttp2_fullstack_uds_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_fullstack_uds_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_fullstack_uds_empty_batch_unsecure_test.exe chttp2_fullstack_uds_graceful_server_shutdown_unsecure_test.exe chttp2_fullstack_uds_invoke_large_request_unsecure_test.exe chttp2_fullstack_uds_max_concurrent_streams_unsecure_test.exe chttp2_fullstack_uds_max_message_length_unsecure_test.exe chttp2_fullstack_uds_no_op_unsecure_test.exe chttp2_fullstack_uds_ping_pong_streaming_unsecure_test.exe chttp2_fullstack_uds_registered_call_unsecure_test.exe chttp2_fullstack_uds_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_fullstack_uds_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_fullstack_uds_request_response_with_payload_unsecure_test.exe chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test.exe chttp2_fullstack_uds_request_with_large_metadata_unsecure_test.exe chttp2_fullstack_uds_request_with_payload_unsecure_test.exe chttp2_fullstack_uds_simple_delayed_request_unsecure_test.exe chttp2_fullstack_uds_simple_request_unsecure_test.exe chttp2_fullstack_uds_simple_request_with_high_initial_sequence_number_unsecure_test.exe chttp2_socket_pair_bad_hostname_unsecure_test.exe chttp2_socket_pair_cancel_after_accept_unsecure_test.exe chttp2_socket_pair_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_socket_pair_cancel_after_invoke_unsecure_test.exe chttp2_socket_pair_cancel_before_invoke_unsecure_test.exe chttp2_socket_pair_cancel_in_a_vacuum_unsecure_test.exe chttp2_socket_pair_census_simple_request_unsecure_test.exe chttp2_socket_pair_disappearing_server_unsecure_test.exe chttp2_socket_pair_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_socket_pair_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_socket_pair_empty_batch_unsecure_test.exe chttp2_socket_pair_graceful_server_shutdown_unsecure_test.exe chttp2_socket_pair_invoke_large_request_unsecure_test.exe chttp2_socket_pair_max_concurrent_streams_unsecure_test.exe chttp2_socket_pair_max_message_length_unsecure_test.exe chttp2_socket_pair_no_op_unsecure_test.exe chttp2_socket_pair_ping_pong_streaming_unsecure_test.exe chttp2_socket_pair_registered_call_unsecure_test.exe chttp2_socket_pair_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_request_response_with_payload_unsecure_test.exe chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_request_with_large_metadata_unsecure_test.exe chttp2_socket_pair_request_with_payload_unsecure_test.exe chttp2_socket_pair_simple_delayed_request_unsecure_test.exe chttp2_socket_pair_simple_request_unsecure_test.exe chttp2_socket_pair_simple_request_with_high_initial_sequence_number_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_bad_hostname_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_before_invoke_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_in_a_vacuum_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_census_simple_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_disappearing_server_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_empty_batch_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_max_message_length_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_no_op_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_ping_pong_streaming_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_registered_call_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_request_with_high_initial_sequence_number_unsecure_test.exe 
+buildtests_c: alarm_heap_test.exe alarm_list_test.exe alarm_test.exe alpn_test.exe bin_encoder_test.exe census_hash_table_test.exe census_statistics_multiple_writers_circular_buffer_test.exe census_statistics_multiple_writers_test.exe census_statistics_performance_test.exe census_statistics_quick_test.exe census_statistics_small_log_test.exe census_stub_test.exe census_window_stats_test.exe chttp2_status_conversion_test.exe chttp2_stream_encoder_test.exe chttp2_stream_map_test.exe fd_posix_test.exe fling_client.exe fling_server.exe fling_stream_test.exe fling_test.exe gpr_cancellable_test.exe gpr_cmdline_test.exe gpr_env_test.exe gpr_file_test.exe gpr_histogram_test.exe gpr_host_port_test.exe gpr_log_test.exe gpr_slice_buffer_test.exe gpr_slice_test.exe gpr_string_test.exe gpr_sync_test.exe gpr_thd_test.exe gpr_time_test.exe gpr_tls_test.exe gpr_useful_test.exe grpc_base64_test.exe grpc_byte_buffer_reader_test.exe grpc_channel_stack_test.exe grpc_completion_queue_test.exe grpc_credentials_test.exe grpc_json_token_test.exe grpc_stream_op_test.exe hpack_parser_test.exe hpack_table_test.exe httpcli_format_request_test.exe httpcli_parser_test.exe httpcli_test.exe json_rewrite.exe json_rewrite_test.exe json_test.exe lame_client_test.exe message_compress_test.exe multi_init_test.exe murmur_hash_test.exe no_server_test.exe poll_kick_posix_test.exe resolve_address_test.exe secure_endpoint_test.exe sockaddr_utils_test.exe tcp_client_posix_test.exe tcp_posix_test.exe tcp_server_posix_test.exe time_averaged_stats_test.exe time_test.exe timeout_encoding_test.exe timers_test.exe transport_metadata_test.exe transport_security_test.exe chttp2_fullstack_bad_hostname_unsecure_test.exe chttp2_fullstack_cancel_after_accept_unsecure_test.exe chttp2_fullstack_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_fullstack_cancel_after_invoke_unsecure_test.exe chttp2_fullstack_cancel_before_invoke_unsecure_test.exe chttp2_fullstack_cancel_in_a_vacuum_unsecure_test.exe chttp2_fullstack_census_simple_request_unsecure_test.exe chttp2_fullstack_disappearing_server_unsecure_test.exe chttp2_fullstack_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_fullstack_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_fullstack_empty_batch_unsecure_test.exe chttp2_fullstack_graceful_server_shutdown_unsecure_test.exe chttp2_fullstack_invoke_large_request_unsecure_test.exe chttp2_fullstack_max_concurrent_streams_unsecure_test.exe chttp2_fullstack_max_message_length_unsecure_test.exe chttp2_fullstack_no_op_unsecure_test.exe chttp2_fullstack_ping_pong_streaming_unsecure_test.exe chttp2_fullstack_registered_call_unsecure_test.exe chttp2_fullstack_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_fullstack_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_fullstack_request_response_with_payload_unsecure_test.exe chttp2_fullstack_request_with_large_metadata_unsecure_test.exe chttp2_fullstack_request_with_payload_unsecure_test.exe chttp2_fullstack_simple_delayed_request_unsecure_test.exe chttp2_fullstack_simple_request_unsecure_test.exe chttp2_fullstack_simple_request_with_high_initial_sequence_number_unsecure_test.exe chttp2_fullstack_uds_bad_hostname_unsecure_test.exe chttp2_fullstack_uds_cancel_after_accept_unsecure_test.exe chttp2_fullstack_uds_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_fullstack_uds_cancel_after_invoke_unsecure_test.exe chttp2_fullstack_uds_cancel_before_invoke_unsecure_test.exe chttp2_fullstack_uds_cancel_in_a_vacuum_unsecure_test.exe chttp2_fullstack_uds_census_simple_request_unsecure_test.exe chttp2_fullstack_uds_disappearing_server_unsecure_test.exe chttp2_fullstack_uds_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_fullstack_uds_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_fullstack_uds_empty_batch_unsecure_test.exe chttp2_fullstack_uds_graceful_server_shutdown_unsecure_test.exe chttp2_fullstack_uds_invoke_large_request_unsecure_test.exe chttp2_fullstack_uds_max_concurrent_streams_unsecure_test.exe chttp2_fullstack_uds_max_message_length_unsecure_test.exe chttp2_fullstack_uds_no_op_unsecure_test.exe chttp2_fullstack_uds_ping_pong_streaming_unsecure_test.exe chttp2_fullstack_uds_registered_call_unsecure_test.exe chttp2_fullstack_uds_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_fullstack_uds_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_fullstack_uds_request_response_with_payload_unsecure_test.exe chttp2_fullstack_uds_request_with_large_metadata_unsecure_test.exe chttp2_fullstack_uds_request_with_payload_unsecure_test.exe chttp2_fullstack_uds_simple_delayed_request_unsecure_test.exe chttp2_fullstack_uds_simple_request_unsecure_test.exe chttp2_fullstack_uds_simple_request_with_high_initial_sequence_number_unsecure_test.exe chttp2_socket_pair_bad_hostname_unsecure_test.exe chttp2_socket_pair_cancel_after_accept_unsecure_test.exe chttp2_socket_pair_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_socket_pair_cancel_after_invoke_unsecure_test.exe chttp2_socket_pair_cancel_before_invoke_unsecure_test.exe chttp2_socket_pair_cancel_in_a_vacuum_unsecure_test.exe chttp2_socket_pair_census_simple_request_unsecure_test.exe chttp2_socket_pair_disappearing_server_unsecure_test.exe chttp2_socket_pair_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_socket_pair_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_socket_pair_empty_batch_unsecure_test.exe chttp2_socket_pair_graceful_server_shutdown_unsecure_test.exe chttp2_socket_pair_invoke_large_request_unsecure_test.exe chttp2_socket_pair_max_concurrent_streams_unsecure_test.exe chttp2_socket_pair_max_message_length_unsecure_test.exe chttp2_socket_pair_no_op_unsecure_test.exe chttp2_socket_pair_ping_pong_streaming_unsecure_test.exe chttp2_socket_pair_registered_call_unsecure_test.exe chttp2_socket_pair_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_request_response_with_payload_unsecure_test.exe chttp2_socket_pair_request_with_large_metadata_unsecure_test.exe chttp2_socket_pair_request_with_payload_unsecure_test.exe chttp2_socket_pair_simple_delayed_request_unsecure_test.exe chttp2_socket_pair_simple_request_unsecure_test.exe chttp2_socket_pair_simple_request_with_high_initial_sequence_number_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_bad_hostname_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_before_invoke_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_cancel_in_a_vacuum_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_census_simple_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_disappearing_server_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_inflight_calls_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_tags_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_empty_batch_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_max_message_length_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_no_op_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_ping_pong_streaming_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_registered_call_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_request_with_payload_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_request_unsecure_test.exe chttp2_socket_pair_one_byte_at_a_time_simple_request_with_high_initial_sequence_number_unsecure_test.exe 
 	echo All tests built.
 
 buildtests_cxx: interop_client.exe interop_server.exe 
@@ -864,14 +864,6 @@
 	echo Running chttp2_fullstack_request_response_with_payload_unsecure_test
 	$(OUT_DIR)\chttp2_fullstack_request_response_with_payload_unsecure_test.exe
 
-chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test.exe: build_grpc_test_util $(OUT_DIR)
-	echo Building chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test
-	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ 
-	$(LINK) $(LFLAGS) /OUT:"$(OUT_DIR)\chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test.exe" Debug\end2end_fixture_chttp2_fullstack.lib Debug\end2end_test_request_response_with_trailing_metadata_and_payload.lib Debug\grpc_test_util_unsecure.lib Debug\grpc_unsecure.lib Debug\gpr_test_util.lib Debug\gpr.lib $(LIBS) 
-chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test: chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test.exe
-	echo Running chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test
-	$(OUT_DIR)\chttp2_fullstack_request_response_with_trailing_metadata_and_payload_unsecure_test.exe
-
 chttp2_fullstack_request_with_large_metadata_unsecure_test.exe: build_grpc_test_util $(OUT_DIR)
 	echo Building chttp2_fullstack_request_with_large_metadata_unsecure_test
 	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ 
@@ -1080,14 +1072,6 @@
 	echo Running chttp2_fullstack_uds_request_response_with_payload_unsecure_test
 	$(OUT_DIR)\chttp2_fullstack_uds_request_response_with_payload_unsecure_test.exe
 
-chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test.exe: build_grpc_test_util $(OUT_DIR)
-	echo Building chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test
-	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ 
-	$(LINK) $(LFLAGS) /OUT:"$(OUT_DIR)\chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test.exe" Debug\end2end_fixture_chttp2_fullstack_uds.lib Debug\end2end_test_request_response_with_trailing_metadata_and_payload.lib Debug\grpc_test_util_unsecure.lib Debug\grpc_unsecure.lib Debug\gpr_test_util.lib Debug\gpr.lib $(LIBS) 
-chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test: chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test.exe
-	echo Running chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test
-	$(OUT_DIR)\chttp2_fullstack_uds_request_response_with_trailing_metadata_and_payload_unsecure_test.exe
-
 chttp2_fullstack_uds_request_with_large_metadata_unsecure_test.exe: build_grpc_test_util $(OUT_DIR)
 	echo Building chttp2_fullstack_uds_request_with_large_metadata_unsecure_test
 	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ 
@@ -1296,14 +1280,6 @@
 	echo Running chttp2_socket_pair_request_response_with_payload_unsecure_test
 	$(OUT_DIR)\chttp2_socket_pair_request_response_with_payload_unsecure_test.exe
 
-chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test.exe: build_grpc_test_util $(OUT_DIR)
-	echo Building chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test
-	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ 
-	$(LINK) $(LFLAGS) /OUT:"$(OUT_DIR)\chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test.exe" Debug\end2end_fixture_chttp2_socket_pair.lib Debug\end2end_test_request_response_with_trailing_metadata_and_payload.lib Debug\grpc_test_util_unsecure.lib Debug\grpc_unsecure.lib Debug\gpr_test_util.lib Debug\gpr.lib $(LIBS) 
-chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test: chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test.exe
-	echo Running chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test
-	$(OUT_DIR)\chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test.exe
-
 chttp2_socket_pair_request_with_large_metadata_unsecure_test.exe: build_grpc_test_util $(OUT_DIR)
 	echo Building chttp2_socket_pair_request_with_large_metadata_unsecure_test
 	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ 
@@ -1512,14 +1488,6 @@
 	echo Running chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_unsecure_test
 	$(OUT_DIR)\chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_unsecure_test.exe
 
-chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test.exe: build_grpc_test_util $(OUT_DIR)
-	echo Building chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test
-	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ 
-	$(LINK) $(LFLAGS) /OUT:"$(OUT_DIR)\chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test.exe" Debug\end2end_fixture_chttp2_socket_pair_one_byte_at_a_time.lib Debug\end2end_test_request_response_with_trailing_metadata_and_payload.lib Debug\grpc_test_util_unsecure.lib Debug\grpc_unsecure.lib Debug\gpr_test_util.lib Debug\gpr.lib $(LIBS) 
-chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test: chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test.exe
-	echo Running chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test
-	$(OUT_DIR)\chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test.exe
-
 chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test.exe: build_grpc_test_util $(OUT_DIR)
 	echo Building chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test
 	$(CC) $(CFLAGS) /Fo:$(OUT_DIR)\ 
diff --git a/vsprojects/grpc/grpc.vcxproj b/vsprojects/grpc/grpc.vcxproj
index 0007f49..b1a92cf 100644
--- a/vsprojects/grpc/grpc.vcxproj
+++ b/vsprojects/grpc/grpc.vcxproj
@@ -161,6 +161,7 @@
     <ClInclude Include="..\..\src\core\httpcli\parser.h" />
     <ClInclude Include="..\..\src\core\security\auth.h" />
     <ClInclude Include="..\..\src\core\security\base64.h" />
+    <ClInclude Include="..\..\src\core\security\context.h" />
     <ClInclude Include="..\..\src\core\security\credentials.h" />
     <ClInclude Include="..\..\src\core\security\json_token.h" />
     <ClInclude Include="..\..\src\core\security\secure_endpoint.h" />
@@ -271,6 +272,8 @@
     </ClCompile>
     <ClCompile Include="..\..\src\core\security\base64.c">
     </ClCompile>
+    <ClCompile Include="..\..\src\core\security\context.c">
+    </ClCompile>
     <ClCompile Include="..\..\src\core\security\credentials.c">
     </ClCompile>
     <ClCompile Include="..\..\src\core\security\credentials_posix.c">
diff --git a/vsprojects/grpc/grpc.vcxproj.filters b/vsprojects/grpc/grpc.vcxproj.filters
index bd467e0..28e6fab 100644
--- a/vsprojects/grpc/grpc.vcxproj.filters
+++ b/vsprojects/grpc/grpc.vcxproj.filters
@@ -19,6 +19,9 @@
     <ClCompile Include="..\..\src\core\security\base64.c">
       <Filter>src\core\security</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\core\security\context.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\core\security\credentials.c">
       <Filter>src\core\security</Filter>
     </ClCompile>
@@ -392,6 +395,9 @@
     <ClInclude Include="..\..\src\core\security\base64.h">
       <Filter>src\core\security</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\src\core\security\context.h">
+      <Filter>src\core\security</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\src\core\security\credentials.h">
       <Filter>src\core\security</Filter>
     </ClInclude>