See the webhook path you want under retry pressure
The safest webhook path separates trust checks, durable receipt, and asynchronous work so provider retries stay harmless.
How to keep webhook retries from becoming billing chaos
Reliable webhook handling separates trust checks, durable receipt, and asynchronous business logic so the provider can retry without duplicating effects in your system.
The provider may send the same event again, later, or out of order. That behaviour is normal, not exceptional.
Verify the signature and replay window before you accept the payload into your system.
Store the provider event id and payload, dedupe on receipt, and acknowledge quickly so retries stay safe.
Run business logic, dead-letter handling, and operator replays from the durable record instead of the inbound request itself.
Harden the receipt path before you worry about business logic
- Verify signatures and reject invalid payloads early.
- Persist each provider event id and payload so dedupe has something durable to check.
- Acknowledge quickly, then move processing to async workers.
- Keep retries, dead-letter handling, and reprocessors as part of the design, not a future patch.
Use replay safety as part of your billing contract
In most systems, the provider event id becomes the natural idempotency key for processing. If stable ids are weak or missing, build a deterministic identity from payload content and a bounded time window.
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