Arbiter AI MCP Server: Install & Setup

Install Arbiter AI in Claude Code

Claude Code

claude mcp add arbiter-ai -e ARBITER_PRIVATE_KEY=... -- npx -y @arbiterlabs/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "arbiter-ai": {
      "command": "npx",
      "args": [
        "-y",
        "@arbiterlabs/mcp"
      ],
      "env": {
        "ARBITER_PRIVATE_KEY": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Arbiter AI MCP server do?

Is this transaction safe to sign? Decodes what it really does and answers allow, warn or block.

Is the Arbiter AI MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Arbiter AI run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Arbiter AI to Claude Code?

Run: claude mcp add arbiter-ai -e ARBITER_PRIVATE_KEY=... -- npx -y @arbiterlabs/mcp

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