Auth0 Fastify API Integration

Protect Fastify API endpoints with JWT access token validation using @auth0/auth0-fastify-api.

Prerequisites

• Fastify API application (v5.x or newer)
• Node.js 20 LTS or newer
• Auth0 API configured (not Application - must be API resource)
• If you don't have Auth0 set up yet, use the auth0-quickstart skill first

When NOT to Use

• Server-rendered web applications - Use @auth0/auth0-fastify for session-based auth
• Single Page Applications - Use auth0-react, auth0-vue, or auth0-angular for client-side auth
• Next.js applications - Use auth0-nextjs skill
• Mobile applications - Use auth0-react-native for React Native/Expo