generated: '2026-10-18'
method: searched
generator: extract-docs-artifacts.py (local)
source: https://docs.gtm-api.com/guides/receive-webhooks.md
sources:
- https://docs.gtm-api.com/guides/receive-webhooks.md
description: Webhooks cover events from the whole GTM platform. Deliveries are signed with HMAC‑SHA256 using a secret returned at creation.
events:
- event: mass-actions.settled
- event: mass-actions.paused
- event: webhooks.failed
delivery:
  signature: HMAC‑SHA256(secret, "{t}.{raw_body}")
  retries: Up to 5 attempts with back‑off intervals of 1 min, 5 min, 30 min and 2 h; after the 5th failure delivery is terminal.
  content_type: application/json; charset=utf-8
note: After 20 consecutive failed attempts or a single 410 Gone response the subscription is marked failed and stops delivering.
docs: https://docs.gtm-api.com/guides/receive-webhooks.md