Receive and verify Slack Events API callbacks

domain: slack.com · 4 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗

Steps

  1. Subscribe to events in app config with a public Request URL
  2. Answer the one-time url_verification challenge by echoing the challenge value
  3. Verify each request: compute HMAC-SHA256 of 'v0:{timestamp}:{raw body}' with the signing secret, compare to X-Slack-Signature
  4. Respond 200 within 3 seconds; process async

Known gotchas

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