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HTTPayer acts as a payment router for APIs using the 402 Payment Required status code and x402 Protocol. The proxy handles:
- Payment verification and processing
- Cross-chain USDC settlements
- Request forwarding to destination endpoints
- Response delivery to clients
Authentication
Only account-based endpoints (/proxy, proxy/sim, /balance) require an API key; /relay is an x402-enabled endpoint.
Base URL
Getting Started
The API endpoints are organized into the following groups:
- Payment Relay: Core payment processing and relay endpoints
- Simulation: Test payment flows without executing transactions
- Account Management: Check balances and limits
- Webhooks: Async refund tracking
- LLM Endpoints: AI-powered translation and chat features
- System: Health checks and configuration
Browse the endpoint documentation in the sidebar to get started. 
