http-402-paid-apis

Build services that charge per HTTP request in USDC using the x402 protocol, and build clients or AI agents that pay for those services automatically. Covers paywall middleware for Express, Hono and Next.js, wrapped fetch and axios payment clients, facilitator verify and settle calls, spending caps for agent wallets, paid MCP tools, and moving from Base or Solana testnets to mainnet. Use when the user mentions x402, HTTP 402 or payment required responses, USDC and stablecoin micropayments, pay per use API billing, metered endpoints, or agent wallets that pay for calls. Not for card processors such as Stripe, invoicing, crypto checkout pages, or general smart contract and DeFi development.

Version

v1.0.0

Size

17 KB

Updated

2026-10-06

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