Webhook Fan-Out: How to Deliver One Event to Many Endpoints
One incoming event, multiple consumers. Here's how webhook fan-out works, when you need it, and the patterns that hold up in production.
Engineering
Technical insights from the Hookwing engineering team.
One incoming event, multiple consumers. Here's how webhook fan-out works, when you need it, and the patterns that hold up in production.
Webhooks push events to a URL. Event streams let consumers pull at their own pace. Neither is universally better. The choice depends on who consumes and how. Here's the practical decision framework.
Webhooks fail silently, fire asynchronously, and vanish before you can inspect them. Here's a practical system for debugging webhook integrations in dev and production.
Retries handle transient failures. Dead letter queues handle everything else. How to build a DLQ that stores, alerts on, and replays failed webhook events.
Webhook signature verification in plain terms: how HMAC-SHA256 works, a 10-line implementation, and the three mistakes that break it silently.
Practical observability for webhook systems. Which metrics to monitor, how to structure logs, exact alert thresholds, and debugging patterns that catch 80% of production issues.
A practical, empowering checklist to prevent duplicate side effects and keep webhook consumers safe in production.
Retries help, but they are only one part of webhook reliability.