Reliable Webhook Processing
A provider may send the same event multiple times because it cannot know whether the receiver processed the first request successfully.
Store an event identifier and make processing idempotent. If the same event arrives again, return success without repeating the business side effect.
Use queues for durability, dead-letter handling for repeated failures, exponential backoff for retries, and observability for delivery latency and failure rates.
Key Takeaways
- Webhook consumers must expect duplicates.
- Signature validation authenticates payload origin but does not make business processing idempotent.
- A queue separates fast HTTP acknowledgment from slow processing.