Blog
Webhook endpoints and browser CORS: why Stripe-style callbacks are server-to-server
Providers POST signed events to your URL; browsers never call these endpoints directly, so CORS is irrelevant there.
1 min read
webhookssecuritycors
Developer mistakes
Pointing a SPA fetch at a webhook URL will fail CORS by design—use a normal REST route for user actions.
Local testing with Stripe CLI tunnels still bypasses browser CORS because the CLI is not a web origin.
Security
Rotate webhook secrets per environment; never reuse API keys meant for browsers.
IP allowlists complement signature verification when providers publish stable ranges.