Event Identity & Deduplication Headers

At capture time, each event is assigned a v4 UUID (`event.id`) and a UTC timestamp (`event.timestamp`). These are embedded in the payload under the `event` key and sent as `X-Event-Id` and `X-Event-Timestamp` headers on every delivery attempt — including retries. `X-Webhook-Id` carries the webhook's own stable UUID to identify the source configuration.

Payload structure

The default payload shape includes: `event.id` (UUID), `event.timestamp` (ISO 8601 UTC), `event.version` (plugin schema version), `hook` (trigger name), `args` (raw WordPress hook arguments), `timestamp` (Unix epoch), and `site` (site URL and name).

/ Related