Don't Trust Webhooks, Verify with Signatures
Webhook receivers must be designed with distrust of external requests. Since requests can be unstable — with retries, processing delays, and even forgery attempts — signature verification, idempotent processing, retry ID tracking, and queuing for delays are all essential for stable ingestion. Particularly, retries arriving without idempotency keys lead to duplicate processing; when delays grow too long, immediately switch to queue locking.
#webhook#signature-verification#idempotency#retry-handling