curl -v -X POST "http://localhost:8080/a2a/invoke" -d '{"jsonrpc": "2.0","id": 123, "method": "message/send", "params": {"message": {"parts":[{"kind":"text","text": "hi"}],"contextId": "123"}}}'
Note: Unnecessary use of -X or --request, POST is already inferred.
* Host localhost:8080 was resolved.
* IPv6: ::1
* IPv4: 127.0.0.1
*   Trying [::1]:8080...
* Connected to localhost (::1) port 8080
> POST /a2a/invoke HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/8.7.1
> Accept: */*
> Content-Length: 138
> Content-Type: application/x-www-form-urlencoded
>
* upload completely sent off: 138 bytes
< HTTP/1.1 200 OK
< Date: Mon, 09 Mar 2026 07:21:31 GMT
< Content-Length: 700
< Content-Type: text/plain; charset=utf-8
<
{"jsonrpc":"2.0","id":123,"result":{"kind":"task","id":"019cd178-e6a3-7e57-8913-ae1f2955de08","artifacts":[{"artifactId":"019cd178-f747-7309-8378-57d3f427d03d","parts":[{"kind":"text","text":"Hello! I am here to help you find the current time in any city around the world. Since there are no previous requests pending, please let me know which city you would like to know the time for!"}]}],"contextId":"123","history":[{"kind":"message","messageId":"","contextId":"123","parts":[{"kind":"text","text":"hi"}],"role":""}],"metadata":{"adk_app_name":"hello_time_agent","adk_session_id":"123","adk_user_id":"A2A_USER_123"},"status":{"state":"completed","timestamp":"2026-03-09T09:21:31.719226+02:00"}}}
* Connection #0 to host localhost left intact