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WEBHOOK RELEASE FIREWALL
Webhook Replay & Idempotency Failure Lab
Find webhook retry bugs that can duplicate payments, orders, emails, CRM records or destructive account actions before they reach production.
Reviewed 2026-07-08
SecurityReplay windowIdempotency keysDuplicate side effectsYAML release gateJSON receipt
Why this is different
Many webhook bugs look harmless until a 500 response arrives after the side effect already happened. This lab treats delivery attempts as a release-risk graph: stale timestamps, changed idempotency keys, duplicate side effects and out-of-order resource state become visible artifacts and exportable policy.