io.github.forgemeshlabs/x402-ads-mcp

@forgemeshlabs/x402-ads-mcp

Install one middleware. Monetize unused 402 responses with recommendations, discovery, and machine commerce analytics.

This is the MCP side of that network: what autonomous agents probe, want, and abandon across the x402 ecosystem — as tools for your agent.

Wraps the ForgeMesh x402 Ads & Intent Network. Paid tools settle per call in USDC on Base mainnet over the x402 protocol — no account, no API key; your wallet is the login. Publishers get reports on their own services free.

Install

{
  "mcpServers": {
    "intent": {
      "command": "npx",
      "args": ["-y", "@forgemeshlabs/x402-ads-mcp"],
      "env": {
        "WALLET_PRIVATE_KEY": "0x... (optional — enables paid analytics)",
        "X402_ADS_PUBLISHER_KEY": "pub_... (optional — free reports on your own services)"
      }
    }
  }
}

Both env vars are optional. With neither set, free tools work fully and paid tools return the x402 payment challenge (price, network, payTo) instead of settling — useful for inspection before spending anything.

Bonus: one-command publisher registration

This package doubles as the signup CLI for API operators (no MCP client needed):

# read the terms first: https://ads.forgemesh.io/terms
WALLET_PRIVATE_KEY=0xYOUR_WALLET npx -y @forgemeshlabs/x402-ads-mcp register \
  --url https://api.your-service.com --accept-terms

One $0.10 USDC payment on Base; the paying wallet becomes your identity and your publisher key is printed once. Invalid requests are rejected before payment — you can't pay for a doomed registration.

Tools

\* get_intent_report is free with X402_ADS_PUBLISHER_KEY for services you contribute events to — the data co-op rule: your own data is free, forever.

Environment

The backend URL is fixed to https://ads.forgemesh.io (the publisher key is only ever sent there). The server refuses to sign for any payee other than the ForgeMesh Ads wallet, any network other than Base mainnet, any asset other than USDC, or any amount over the cap. Use a dedicated, low-balance wallet. The key never leaves your machine — payments are signed locally (EIP-3009) and settle on-chain.

Ready-made configs live in examples/: a Claude Desktop mcpServers block and a commented env-var template.

Testing (safe by construction)

npm test                # smoke: MCP boots over stdio and lists its 7 tools
npm run test:free       # free tools against the live network
npm run test:challenge  # every paid tool returns an x402 challenge — no wallet, nothing can spend
npm run test:all        # all of the above

No test settles a payment. The challenge test deletes the payment env vars before loading, so it cannot move funds even if your shell has a wallet configured.

The network in one sentence

We measure machine commerce, not API content — publishers running the @forgemeshlabs/x402-ads middleware contribute anonymized 402 probe metadata; this MCP sells the aggregate demand signal back to agents and builders.

Full disclosure of what publishers send (and never send): https://ads.forgemesh.io/terms

License

MIT © ForgeMesh