@gatefare/mcp

Give your AI agent a wallet and a marketplace.

@gatefare/mcp is a Model Context Protocol server that connects Claude Desktop, Cursor, or any MCP-compatible agent to the Gatefare catalog of paid HTTP APIs. Payments settle as USDC on Base via the open x402 standard — no SaaS keys, no subscriptions, no escrow. Non-custodial: signing happens locally; the private key never leaves your machine.

┌─────────────┐                ┌──────────────┐                ┌─────────────────┐
│ Claude /    │   MCP stdio    │ @gatefare/mcp│  HTTP + x402   │ gatefare.io     │
│ Cursor /    │ ─────────────► │   (this repo)│ ─────────────► │ proxy +         │
│ your agent  │                │              │                │ catalog         │
└─────────────┘                └──────┬───────┘                └─────────────────┘
                                      │
                                      │ EIP-3009 sign
                                      ▼
                                ┌─────────────┐
                                │  Base USDC  │
                                └─────────────┘

Quick start

1. Drop into your client

Claude Desktop — ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "gatefare": {
      "command": "npx",
      "args": ["-y", "@gatefare/mcp"]
    }
  }
}

Cursor — ~/.cursor/mcp.json or project-level .cursor/mcp.json:

{
  "mcpServers": {
    "gatefare": {
      "command": "npx",
      "args": ["-y", "@gatefare/mcp"]
    }
  }
}

Restart the client. The agent now has 5 read-only tools — discovery + safety. Try:

"Search Gatefare for weather APIs."

2. Add a wallet to make paid calls

Add env to the same config:

{
  "mcpServers": {
    "gatefare": {
      "command": "npx",
      "args": ["-y", "@gatefare/mcp"],
      "env": {
        "WALLET_PRIVATE_KEY": "0xYOUR_KEY",
        "WALLET_BUDGET_USD": "5.00"
      }
    }
  }
}

Buyer tools (call_api, get_wallet_balance, estimate_cost) become available. The WALLET_BUDGET_USD cap is a runtime safety net — for a hard cap, fund the wallet with only what you're willing to spend.

"What's London's weather right now? Spend up to $0.001."

3. (Optional) Publish your own APIs

Get a PAT at gatefare.io/dashboard/tokens and add:

"env": {
  "GATEFARE_PAT": "gfpat_..."
}

Publisher tools (register_api, list_my_apis, update_api, get_revenue, distribute) appear.

"Publish my API at https://api.example.com/sentiment for $0.001 per call."

Tools

13 tools across 4 domains. Tools auto-register based on which env vars are set — the agent never sees a tool it can't use.

Discovery — always available

... View full README on GitHub