Your Laravel Webhooks Are Insecure (How to Fix Them in 10 Minutes)

The Open Door Policy When you integrate a third-party service like Stripe, Razorpay, or GitHub, you rely on webhooks. The external service sends an HTTP POST request to your Laravel API to tell you an event happened (e.g., "Payment Successful"). The easiest way to build this is to create an open POST route, accept the JSON payload, and update your database. This is incredibly dangerous. If your webhook endpoint is public, anyone can send a fake POST request to /api/webhooks/payment with a payload that says {"status": "paid", "user_id": 5} . Without security, you just gave away your product for free. The Solution: Cryptographic Signatures You cannot use standard authentication (like Sanctum tokens) for webhooks, because Stripe cannot log in to your app. Instead, secure services use HMAC Signatures . When Stripe sends a webhook, they sign the payload using a secret key only you and Stripe know. They attach this signature as a custom header (e.g., Stripe-Signature ). Your Laravel app must