x402-mcp
MCP server bringing 100+ x402-paid APIs to AI agents (Claude, Cursor, MCP-aware clients). Auto-discovers tools from CDP Bazaar; handles USDC micropayments on Base.
Features
- Auto-discovers x402 endpoints from CDP Bazaar (no hard-coded list)
- Reads metadata directly from Bazaar (description, schema, pricing)
- Refreshes every 5 min — new endpoints appear without restart
- Handles HTTP 402 + USDC payment automatically
- Multi-chain ready via x402 protocol (Base today; Solana, Polygon, BNB, EVM expansion)
Install (Claude Desktop)
Add to claude_desktop_config.json:
{
"mcpServers": {
"x402-mcp": {
"command": "npx",
"args": ["-y", "x402node-mcp"],
"env": { "X402_PRIVATE_KEY": "0xYOUR_BASE_PRIVATE_KEY" }
}
}
}Set X402_PRIVATE_KEY to a Base EOA private key (hex, 0x-prefixed) with USDC on Base mainnet. Restart Claude Desktop. The server auto-discovers ~117 tools on first run.
Cost Safety
- Each tool call costs $0.0001-$0.10 USDC depending on endpoint
- Hard cap:
MAX_PRICE_USDenv var (default $0.10/call); calls above are blocked - Use a fresh burner wallet, not your main wallet
