Webhook Security: Signatures, Retries & Best Practices
How to secure webhooks: signature verification (HMAC), idempotency, retry handling, IP allowlisting, and timeout configuration.
Verify Webhook Signatures
const crypto = require('crypto');\n\nfunction verifySignature(payload, signature, secret) {\n const expected = crypto\n .createHmac('sha256', secret)\n .update(payload)\n .digest('hex');\n return crypto.timingSafeEqual(\n Buffer.from(signature),\n Buffer.from(expected)\n );\n}Always use timingSafeEqual to prevent timing attacks. Generate HMAC hashes with our Hash Generator.
Try It Free
Use our free online tool — 100% client-side, no data leaves your browser.
Open Hash Generator