Webhook Signature Verification: Implementing HMAC SHA-256 in Node.js and Python
Secure your webhook endpoints against forgery with cryptographic HMAC SHA-256 signatures. Complete verification code for Stripe, Shopify, and GitHub.
Because webhook endpoints are public URLs listening for incoming POST requests, malicious actors can send forged payment confirmations. Providers solve this by signing payloads with an HMAC SHA-256 hash using a shared secret key.