Events API

Publish an event, retrieve its immutable record, and inspect delivery history.

Arc Runtime 3.xUpdated Jul 18, 2026

Publish an event

http

POST /v3/events HTTP/1.1
Content-Type: application/json
Idempotency-Key: order-ord_7K2M

{
  "type": "order.accepted",
  "payload": {
    "orderId": "ord_7K2M",
    "region": "north"
  }
}

Response

json

{
  "id": "evt_2F9Q",
  "type": "order.accepted",
  "acceptedAt": "2026-07-18T10:32:08Z"
}

Idempotency

Reuse the same idempotency key only when retrying the same logical publish operation. Keys are scoped to a workspace and retained for 24 hours.

On this page

Publish an event
Response
Idempotency