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CRA AGENT

io.github.giupy997/cra-agent ยท v0.0.11

Lets an agent pay for x402 APIs in USDC on Arc, under a spending policy it cannot change.

Website Source code Set it up

Connect Runs on your machine

Terminal
claude mcp add cra-agent -e CRA_NETWORK=<CRA_NETWORK> -e CRA_KEY_FILE=<CRA_KEY_FILE> -e CRA_POLICY=<CRA_POLICY> -e CRA_RPC_URL=<CRA_RPC_URL> -e DATABASE_URL=<DATABASE_URL> -- npx -y @cra-agent/[email protected]
claude_desktop_config.json
{
  "mcpServers": {
    "cra-agent": {
      "command": "npx",
      "args": [
        "-y",
        "@cra-agent/[email protected]"
      ],
      "env": {
        "CRA_NETWORK": "<CRA_NETWORK>",
        "CRA_KEY_FILE": "<CRA_KEY_FILE>",
        "CRA_POLICY": "<CRA_POLICY>",
        "CRA_RPC_URL": "<CRA_RPC_URL>",
        "DATABASE_URL": "<DATABASE_URL>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "cra-agent": {
      "command": "npx",
      "args": [
        "-y",
        "@cra-agent/[email protected]"
      ],
      "env": {
        "CRA_NETWORK": "<CRA_NETWORK>",
        "CRA_KEY_FILE": "<CRA_KEY_FILE>",
        "CRA_POLICY": "<CRA_POLICY>",
        "CRA_RPC_URL": "<CRA_RPC_URL>",
        "DATABASE_URL": "<DATABASE_URL>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "cra-agent": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cra-agent/[email protected]"
      ],
      "env": {
        "CRA_NETWORK": "<CRA_NETWORK>",
        "CRA_KEY_FILE": "<CRA_KEY_FILE>",
        "CRA_POLICY": "<CRA_POLICY>",
        "CRA_RPC_URL": "<CRA_RPC_URL>",
        "DATABASE_URL": "<DATABASE_URL>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
CRA_NETWORK
Required		arc (mainnet) or arcTestnet
CRA_KEY_FILE
Required		Path to a chmod 600 file holding the agent's private key. Never put the key in a prompt.
CRA_POLICY
Optional		Spending limits, e.g. daily=5,per_seller=0.5,per_payment=0.05
CRA_RPC_URL
Optional		Optional RPC endpoints, comma separated, in priority order
DATABASE_URL
Optional		Optional Postgres for the ledger; in memory without it

Details

Package@cra-agent/[email protected] (NPM, stdio)
First published23 Sep 2026
Last updated23 Sep 2026
Registry nameio.github.giupy997/cra-agent

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