MCP Command Server

A secure server for executing pre-approved system commands via an environment variable.

GitHub

MCP Command Server

A secure Model Context Protocol (MCP) server for executing system commands through LLM applications like Claude.

Quick Start

  1. Install the package:
uv pip install mcp-command-server
  1. Configure allowed commands:
export ALLOWED_COMMANDS="ls,pwd,echo"
  1. Add to Claude Desktop configuration:
{
  "mcpServers": {
    "command-server": {
      "command": "uv",
      "args": ["run", "python", "-m", "mcp_command_server"],
      "env": {
        "ALLOWED_COMMANDS": "ls,pwd,echo"
      }
    }
  }
}

Features

  • 🔒 Secure command execution with whitelist
  • ✅ User confirmation for all commands
  • 📝 Comprehensive audit logging
  • 🔍 Input validation and sanitization
  • 🤖 Claude Desktop integration

Documentation

For complete documentation, see the docs/ directory:

Development

Setup

# Clone repository
git clone https://github.com/yourusername/mcp-command-server.git
cd mcp-command-server

# Create virtual environment
uv venv
source .venv/bin/activate  # On Unix/macOS
.venv\Scripts\activate     # On Windows

# Install development dependencies
uv pip install -e ".[dev]"

Testing

# Run all tests
pytest

# Run specific test file
pytest tests/unit/security/test_validator.py

# Run with coverage
pytest --cov=mcp_command_server

Contributing

  1. Fork the repository
  2. Create your feature branch
  3. Run tests and linting
  4. Submit a pull request

License

MIT License - see LICENSE for details.

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