x402

x402 Protocol Skill

What is x402? x402 is the HTTP 402 Payment Required protocol for web services. It enables seamless micropayments for API calls, data access, and compute resources. x402 turns any HTTP endpoint into a pay-per-use service with instant settlement.

Why use this skill?

• 💳 Micropayments — Charge tiny amounts per request with minimal friction
• ⚡ Instant Settlement — Funds settle immediately on-chain
• 🔐 Cryptographic Proof — Payment verification built into HTTP headers
• 🌐 Universal — Works with any HTTP client & service

Quick Start

// Server: Accept x402 payments
app.get('/api/data', x402.require({ price: 0.01 }), async (req, res) => {
  // Payment verified in req.payment
  const data = await fetchData(req.query.id);
  res.json(data);
});

// Client: Make x402 request
const response = await x402.fetch('https://api.example.com/data?id=123', {
  price: 0.01,
  wallet: userWallet,
  onPayment: (receipt) => console.log('Paid:', receipt)
});

Full Documentation 👉 x402 Specification

Integration Points

• HTTP 402 Endpoint — Protect your API with x402
• Payment Routing — Direct payments to wallets or contracts
• Settlement — Automatic transaction confirmation
• Verification — Cryptographic proof of payment

Examples

• API rate limiting based on payments
• Data monetization for datasets
• Compute resources (GPU time, storage)
• Access control for premium content

Community

• Specification: https://x402.org
• GitHub: https://github.com/x402-protocol
• Implementations: https://x402.org/implementations

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How to Use This Skill Wrap your HTTP endpoints with x402 to require micropayments. Clients include x402 headers and pay per request. Settlement happens automatically on-chain. See the spec for implementation details, payment routing options, and security best practices.

MIT Licensed — monetize your services instantly! 💰