{"endpoint":{"id":189381,"url":"https://a2a-artifact-handoff-staging.onrender.com/","host":"a2a-artifact-handoff-staging.onrender.com","kind":"sigdir","first_seen":"2026-09-07T01:27:15+00:00","last_seen":"2026-09-08T01:29:41+00:00","last_probed_at":"2026-09-07T11:27:35+00:00","last_outcome":"connect-fail","last_score":null,"last_latency_ms":2249,"last_http_status":null},"probes":[{"id":198835,"endpoint_id":189381,"probed_at":"2026-09-07T11:27:35+00:00","probe_kind":"sigdir","outcome":"connect-fail","http_status":null,"latency_ms":2249,"protocol_version":null,"score":null,"capabilities":{},"error":"LocalProtocolError: Invalid input ConnectionInputs.SEND_HEADERS in state ConnectionState.CLOSED","meta":{"vantage":"us-east-1"},"ip":"216.24.57.15"}]}