diff --git a/tck/sut_agent.py b/tck/sut_agent.py
index 0ca3a1450..206774c64 100644
--- a/tck/sut_agent.py
+++ b/tck/sut_agent.py
@@ -14,6 +14,7 @@
 import a2a.types.a2a_pb2_grpc as a2a_grpc
 
 from a2a.compat.v0_3.grpc_handler import CompatGrpcHandler
+from a2a.helpers.proto_helpers import new_task_from_user_message
 from a2a.server.agent_execution.agent_executor import AgentExecutor
 from a2a.server.agent_execution.context import RequestContext
 from a2a.server.events.event_queue import EventQueue
@@ -87,6 +88,13 @@ async def execute(
 
         self.running_tasks.add(task_id)
 
+        # 1.0 semantics: the Task itself must be enqueued before any
+        # TaskStatusUpdateEvent (the SDK enforces this ordering).
+        task = context.current_task
+        if not task:
+            task = new_task_from_user_message(user_message)
+            await event_queue.enqueue_event(task)
+
         logger.info(
             '[SUTAgentExecutor] Processing message %s for task %s (context: %s)',
             user_message.message_id,
@@ -157,11 +165,11 @@ def serve(task_store: TaskStore) -> None:
             ),
             AgentInterface(
                 url=f'http://localhost:{http_port}{REST_URL}',
-                protocol_binding='REST',
+                protocol_binding='HTTP+JSON',
                 protocol_version='1.0.0',
             ),
             AgentInterface(
-                url=f'http://localhost:{grpc_port}',
+                url=f'localhost:{grpc_port}',
                 protocol_binding='GRPC',
                 protocol_version='1.0.0',
             ),