Learn / Webhooks
Webhooks, explained
Short, practical guides for developers who receive webhooks: what they are, how to secure them, and how to keep them working when things go wrong. No sign-up needed.
- 01
What is a webhook? Webhooks vs. polling vs. WebSockets
How webhooks work, when to use them instead of polling or WebSockets, and what a webhook request looks like on the wire.
6 min read - 02
Webhook security: HMAC signatures, timestamps and replay protection
Why every webhook endpoint must verify signatures, how HMAC verification works step by step, and the mistakes that quietly break it.
8 min read - 03
Webhook retries, idempotency and failure handling
How to design webhook handlers that survive downtime, duplicates and out-of-order events: retries with backoff, idempotency keys and dead letters.
8 min read - 04
How to test webhooks locally
Get real webhooks to the app on your laptop: tunnels, provider CLIs, replaying captured events, and what to check before you ship.
6 min read - 05
Fixing Stripe webhook signature verification errors
“No signatures found matching the expected signature for payload”: the five causes, how to spot each one, and how to fix them in Node, Express and Next.js.
7 min read
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