verification.cancelled
Fires when POST /verify/{task_id}/cancel stopped the run: nothing was saved or charged. A 2026-05-13 submission receives verification.failed with failure_class "cancelled" instead.
postWebhookverification.cancelled
Payload
Response
Your endpoint should return 2xx within 5 seconds. Non-2xx triggers retries at 10s / 60s / 600s (3 retries after the initial delivery, 4 attempts total).
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.