Framework Recipes
Next.js Middleware
Payment middleware for Next.js API routes and Edge functions
Express
Express.js middleware for payment-protected APIs
FastAPI
Python FastAPI dependency injection for x402 payments
Cloudflare Worker
Edge-native payment middleware for Workers
Nginx Reverse Proxy
Nginx configuration for payment gating
Common Patterns
- Per-request pricing
- Token-based sessions
- Metered usage billing
- Multi-tier pricing
- Webhook notifications
- Quota management