presign-guard wallet

stdio

A wallet with spending limits for agents: pay x402 APIs, send USDC, phone approval over the limit.

Getting Started

npx @getmcp/cli add io.github.Fizzl13/presign-guard-wallet

Requires Node.js 18+. Community-contributed server. Review source before installing.

Claude Desktopguide →Vscodeguide →Cursorguide →Windsurfguide →

Required Environment Variables

AGENT_KEY
Private key of the agent's own wallet (a separate wallet holding only what the agent may spend)

Configuration

Config file: ~/Library/Application Support/Claude/claude_desktop_config.json

JSON

{
  "mcpServers": {
    "io.github.Fizzl13/presign-guard-wallet": {
      "command": "npx",
      "args": [
        "-y",
        "presign-guard-wallet-mcp"
      ],
      "env": {
        "AGENT_KEY": "",
        "LIMIT_USDC_PER_TX": "",
        "LIMIT_USDC_PER_DAY": "",
        "TELEGRAM_BOT_TOKEN": "",
        "TELEGRAM_CHAT_ID": "",
        "WALLET_SERVER_URL": "",
        "WALLET_SERVER_KEY": "",
        "CHAIN": "",
        "MAX_PAYMENT_USD": "",
        "PRESIGN_CREDIT_KEY": "",
        "RPC_URL": ""
      }
    }
  }
}

Claude Desktop MCP documentation