Register a Famly webhook endpoint and verify inbound event authenticity via HMAC signature

domain: help.famly.co · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗

Steps

  1. Register a webhook URL and event subscription (e.g., child added) in Famly's webhook settings, which generates a shared secret
  2. Implement an endpoint that responds within 10 seconds, since Famly treats slow/non-responsive endpoints as failures
  3. Verify each request using the 'X-Famly-HMAC' header, a hex-encoded SHA256 HMAC of the payload computed with the registered secret
  4. Use the eventId (stable across retries) rather than requestID (changes per retry) to deduplicate events
  5. Check Famly's webhook event log (30-day retention) to debug delivery failures

Known gotchas

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