True402 MCP server

@true402.dev/mcp-server

MCP server for the true402 machine-native marketplace — give your agent pay-per-call access to AI inference and web tools over x402 (HTTP 402 micropayments in USDC on Base).

No accounts, no API keys. The agent's wallet is its identity: each paid tool returns an HTTP 402 challenge, the server signs an EIP-3009 USDC authorization, and the call settles on-chain. Configure a funded wallet to auto-pay, or run without one and the paid tools will surface the exact payment requirements instead of failing.

Tools

Tools are auto-discovered from the live catalog, so new marketplace stalls appear automatically. Prices are illustrative; the live 402 challenge is authoritative.

Example: add token-safety to your agent

A copy-paste reference in examples/token-safety/ — a framework-agnostic x402 client plus a drop-in LangChain tool that rug/honeypot-checks any Base token for $0.005/call.

Install

Requires Node.js ≥ 20. Runs over stdio — point any MCP client at it via npx.

Claude Desktop / Claude Code

Add to your MCP config (claudedesktopconfig.json, or .mcp.json for Claude Code):

{
  "mcpServers": {
    "true402": {
      "command": "npx",
      "args": ["-y", "@true402.dev/mcp-server"],
      "env": {
        "WALLET_PRIVATE_KEY": "0xYOUR_FUNDED_BASE_WALLET_KEY"
      }
    }
  }
}

Cursor / Cline / other MCP clients

Same idea — command npx, args ["-y", "@true402.dev/mcp-server"], and the WALLETPRIVATEKEY env var.

Configuration

Shortened. The full README is on GitHub.