### 1 · SendStreamingMessage: the full suite
POST /a2a/jsonrpc HTTP/1.1
Host: localhost:41241
Content-Type: application/json
A2A-Version: 1.0
Accept: text/event-stream

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "SendStreamingMessage",
  "params": {
    "message": {
      "messageId": "c15521b1-b3dc-450a-9daa-37e51b591d75",
      "role": "ROLE_USER",
      "parts": [
        {
          "text": "Run the full suite for payments-api at commit 9f3c2e1"
        }
      ]
    }
  }
}

HTTP/1.1 200 OK
Content-Type: text/event-stream

data: {"jsonrpc": "2.0", "id": 1, "result": {"task": {"id": "25239d4c-798b-4754-be06-d1f94d0645b1", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "status": {"state": "TASK_STATE_SUBMITTED", "timestamp": "2026-10-06T09:00:04.000Z"}, "history": [{"messageId": "c15521b1-b3dc-450a-9daa-37e51b591d75", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "taskId": "25239d4c-798b-4754-be06-d1f94d0645b1", "role": "ROLE_USER", "parts": [{"text": "Run the full suite for payments-api at commit 9f3c2e1"}]}]}}}

data: {"jsonrpc": "2.0", "id": 1, "result": {"statusUpdate": {"taskId": "25239d4c-798b-4754-be06-d1f94d0645b1", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "status": {"state": "TASK_STATE_WORKING", "message": {"messageId": "47206245-9085-4c5c-9899-3f2b41a7a980", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "taskId": "25239d4c-798b-4754-be06-d1f94d0645b1", "role": "ROLE_AGENT", "parts": [{"text": "Checking out 9f3c2e1 and starting the suite"}]}, "timestamp": "2026-10-06T09:00:04.250Z"}}}}

data: {"jsonrpc": "2.0", "id": 1, "result": {"artifactUpdate": {"taskId": "25239d4c-798b-4754-be06-d1f94d0645b1", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "artifact": {"artifactId": "test-log", "name": "test-log.txt", "parts": [{"text": "tests/test_suite_01.py ........\n"}]}}}}

data: {"jsonrpc": "2.0", "id": 1, "result": {"artifactUpdate": {"taskId": "25239d4c-798b-4754-be06-d1f94d0645b1", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "artifact": {"artifactId": "test-log", "parts": [{"text": "tests/test_suite_02.py ........\n"}]}, "append": true}}}

# the client closes the connection after 4 events

### 2 · SubscribeToTask: pick the stream back up
POST /a2a/jsonrpc HTTP/1.1
Host: localhost:41241
Content-Type: application/json
A2A-Version: 1.0
Accept: text/event-stream

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "SubscribeToTask",
  "params": {
    "id": "25239d4c-798b-4754-be06-d1f94d0645b1"
  }
}

HTTP/1.1 200 OK
Content-Type: text/event-stream

data: {"jsonrpc": "2.0", "id": 2, "result": {"task": {"id": "25239d4c-798b-4754-be06-d1f94d0645b1", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "status": {"state": "TASK_STATE_WORKING", "message": {"messageId": "47206245-9085-4c5c-9899-3f2b41a7a980", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "taskId": "25239d4c-798b-4754-be06-d1f94d0645b1", "role": "ROLE_AGENT", "parts": [{"text": "Checking out 9f3c2e1 and starting the suite"}]}, "timestamp": "2026-10-06T09:00:04.250Z"}, "history": [{"messageId": "c15521b1-b3dc-450a-9daa-37e51b591d75", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "taskId": "25239d4c-798b-4754-be06-d1f94d0645b1", "role": "ROLE_USER", "parts": [{"text": "Run the full suite for payments-api at commit 9f3c2e1"}]}], "artifacts": [{"artifactId": "test-log", "name": "test-log.txt", "parts": [{"text": "tests/test_suite_01.py ........\n"}, {"text": "tests/test_suite_02.py ........\n"}, {"text": "tests/test_suite_03.py ........\n"}, {"text": "tests/test_suite_04.py ........\n"}]}]}}}

data: {"jsonrpc": "2.0", "id": 2, "result": {"artifactUpdate": {"taskId": "25239d4c-798b-4754-be06-d1f94d0645b1", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "artifact": {"artifactId": "test-log", "parts": [{"text": "tests/test_suite_05.py ........\n"}]}, "append": true}}}

data: {"jsonrpc": "2.0", "id": 2, "result": {"artifactUpdate": {"taskId": "25239d4c-798b-4754-be06-d1f94d0645b1", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "artifact": {"artifactId": "test-log", "parts": [{"text": "tests/test_suite_06.py ........\n"}]}, "append": true}}}

data: {"jsonrpc": "2.0", "id": 2, "result": {"artifactUpdate": {"taskId": "25239d4c-798b-4754-be06-d1f94d0645b1", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "artifact": {"artifactId": "test-log", "parts": [{"text": "tests/test_suite_07.py ........\n"}]}, "append": true}}}

data: {"jsonrpc": "2.0", "id": 2, "result": {"artifactUpdate": {"taskId": "25239d4c-798b-4754-be06-d1f94d0645b1", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "artifact": {"artifactId": "test-log", "parts": [{"text": "tests/test_suite_08.py ........\n"}]}, "append": true, "lastChunk": true}}}

data: {"jsonrpc": "2.0", "id": 2, "result": {"statusUpdate": {"taskId": "25239d4c-798b-4754-be06-d1f94d0645b1", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "status": {"state": "TASK_STATE_COMPLETED", "message": {"messageId": "b9264586-875b-4914-992a-7a26235a16ba", "contextId": "ed92749e-5686-4e20-a1cf-d3b2aee3b1da", "taskId": "25239d4c-798b-4754-be06-d1f94d0645b1", "role": "ROLE_AGENT", "parts": [{"text": "96 passed"}]}, "timestamp": "2026-10-06T09:00:04.500Z"}}}}

### 3 · SubscribeToTask: a finished task
POST /a2a/jsonrpc HTTP/1.1
Host: localhost:41241
Content-Type: application/json
A2A-Version: 1.0
Accept: text/event-stream

{
  "jsonrpc": "2.0",
  "id": 3,
  "method": "SubscribeToTask",
  "params": {
    "id": "25239d4c-798b-4754-be06-d1f94d0645b1"
  }
}

HTTP/1.1 200 OK
Content-Type: application/json

{
  "jsonrpc": "2.0",
  "id": 3,
  "error": {
    "code": -32004,
    "message": "This operation is not supported",
    "data": [
      {
        "@type": "type.googleapis.com/google.rpc.ErrorInfo",
        "reason": "UNSUPPORTED_OPERATION",
        "domain": "a2a-protocol.org",
        "metadata": {
          "taskId": "25239d4c-798b-4754-be06-d1f94d0645b1",
          "state": "TASK_STATE_COMPLETED"
        }
      }
    ]
  }
}