post.failed

The post failed on every channel (no more automatic retries).

postWebhookpost.failed

Headers

Postbase-Event-Idstring
Postbase-Event-Typestring
Postbase-Timestampstring

Unix seconds

Postbase-Signaturestring

sha256=<hex HMAC-SHA256 of ${timestamp}.${raw body} with the endpoint's secret>

Payload

idstring uuid required

Unique per event: use it to ignore repeats

typestring required
created_atstring date-time required
workspace_idstring uuid

Response

Return any 2xx within 10 seconds. Anything else is retried with backoff (1 min, 5 min, 30 min, 2 h, 6 h).

Changes

Webhooks have no change history: a webhook is keyed by its event name rather than a path and method, so no recorded change can name it.