How to Protect an API Integration From Duplicate Webhook Deliveries

Webhook providers may retry delivery when acknowledgments are delayed or lost. If the integration processes every delivery as new, a single event can create duplicate records or repeat a business action.

What to check

Check provider event IDs, retry headers, response timing, concurrent workers, and destination behavior. Determine whether the webhook handler records completion before or after performing the main action.

Recommended next step

Persist event IDs and process them idempotently, return a timely acknowledgment, and move longer work to a durable queue. Reconcile ambiguous failures and test repeated and out-of-order deliveries safely.

How Informatix Systems can help

Informatix Systems provides custom software and API integration services. We can review the affected system, identify likely causes, and help plan a practical fix. Contact us with the platform involved, when the issue began, and non-sensitive error details.