x402 API Network

Micropayment-powered API network for AI agents. Pay per API call with USDC on Base L2.

Built with the x402 protocol — HTTP 402 Payment Required.

Live API

Base URL: https://x402.fatihai.app

Discovery:

• GET / — Free endpoint listing
• GET /.well-known/x402 — Machine-readable manifest
• GET /llms.txt — AI crawler discovery
• GET /health — Health check

Available APIs (16 endpoints)

High-Value APIs

Utility APIs

How It Works

1. Send a request to any API endpoint
2. Receive HTTP 402 with payment requirements in headers
3. Sign a USDC micropayment with your wallet (Base L2)
4. Resend request with PAYMENT-SIGNATURE header
5. Receive API response

Payment Details

• Network: Base Mainnet (EIP-155:8453)
• Currency: USDC
• Facilitator: Coinbase CDP
• Gas fees: ~$0.0001 per transaction

Quick Start

For AI Agents (x402 client)

import { x402Client } from '@x402/core/client';

const client = new x402Client({
  privateKey: '0xYourPrivateKey',
  network: 'eip155:8453',
});

const result = await client.get('https://x402.fatihai.app/api/dns-lookup?domain=google.com');
console.log(result);

MCP Integration (Claude Desktop)

See claude-desktop-config.example.json for Claude Desktop MCP integration.

Direct curl (free mode / development)

# Email verification
curl -X POST https://x402.fatihai.app/api/verify-email \
  -H "Content-Type: application/json" \
  -d '{"email":"[email protected]"}'

# AI content generation
curl -X POST https://x402.fatihai.app/api/ai-generate \
  -H "Content-Type: application/json" \
  -d '{"topic":"AI micropayments","type":"blog_post"}'

# Web scraping
curl "https://x402.fatihai.app/api/scrape?url=https://example.com"

Self-Hosting

git clone https://github.com/user/x402-api-network.git
cd x402-api-network
npm install
cp .env.example .env  # Configure wallet and CDP keys
npm start

Environment Variables

Architecture

x402 API Network
├── server.js            # Express server + x402 middleware + 16 API handlers
├── mcp-server.js        # MCP server for Claude Desktop integration
├── .well-known/x402     # Machine-readable discovery manifest
├── /llms.txt            # AI crawler discovery
└── /health              # Health check endpoint

Discovery

This API is discoverable via:

• x402 Bazaar — CDP facilitator's /discovery/resources endpoint
• .well-known/x402 — Standard machine-readable manifest
• llms.txt — AI search engine optimization
• DNS TXT — _x402.x402.fatihai.app discovery record
• MCP — Model Context Protocol server for Claude/ChatGPT

License

MIT