Production Go library for x402: server middleware for net/http, Chi, Gin, and PocketBase; HTTP client with automatic payment handling; MCP integration. USDC on 8+ chains (Base, Polygon, Avalanche, Solana). The canonical Go x402 SDK.
x402-go is plumbing you wire into your own server. Follow the docs to add x402 pricing to your endpoint, then list the endpoint here so agents can discover it.