Ethereum & EVM Message Signing for Claude Desktop

io.github.nirholas/signing-mcp-server

Sign Ethereum messages - EIP-191, EIP-712 typed data, Permit2, signature verification and recovery

client:Claude Desktop transport:stdio runtime:pypi

Install Ethereum & EVM Message Signing in Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json · windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "signing-mcp-server": {
      "command": "uvx",
      "args": [
        "signing-mcp-server"
      ]
    }
  }
}

Settings → Developer → Edit Config opens this file. Restart the app after saving. Claude Desktop docs