The Field Notes
On forms, submissions, and the boring parts of the web.
Desk · idempotency
All field notes filed under idempotency.
- 01Webhook idempotency: handling duplicate deliveries safely
What webhook idempotency means in practice — why duplicates happen, how to use idempotency keys to keep consumer code safe, and patterns that hold up at scale.
- 02Why webhook deliveries fail and how to replay them safely
The failure modes that take down webhook deliveries — timeouts, signature mismatches, downstream outages — and how to design a replay flow without double-fires.
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