cmd-line-executor-MCP

cmd-line-executor-MCP

3
os_automation

The cmd-line-executor MCP server is designed to interface with command line applications by implementing tools to execute commands and return their output. The project focuses on ease of installation and provides development tools like building, publishing, and debugging through the MCP Inspector.

cmd-line-executor MCP server

Example MCP server to call command line apps

Components

Tools

The server implements one tool:

  • run_command: Runs a command line comment
    • Takes "cmd" and "args" as string arguments
    • Runs the command and returns stdout, stderr, status_code, etc.

Configuration

Quickstart

Install

Claude Desktop

On MacOS: ~/Library/Application\ Support/Claude/claude_desktop_config.json On Windows: %APPDATA%/Claude/claude_desktop_config.json

Development/Unpublished Servers Configuration ``` "mcpServers": { "cmd-line-executor": { "command": "uv", "args": [ "--directory", "/Users/$(whoami)/experiments/claude-mvp/cmd-line-executor", "run", "cmd-line-executor" ] } } ```
Published Servers Configuration ``` "mcpServers": { "cmd-line-executor": { "command": "uvx", "args": [ "cmd-line-executor" ] } } ```

Development

Building and Publishing

To prepare the package for distribution:

  1. Sync dependencies and update lockfile:
uv sync
  1. Build package distributions:
uv build

This will create source and wheel distributions in the dist/ directory.

  1. Publish to PyPI:
uv publish

Note: You'll need to set PyPI credentials via environment variables or command flags:

  • Token: --token or UV_PUBLISH_TOKEN
  • Or username/password: --username/UV_PUBLISH_USERNAME and --password/UV_PUBLISH_PASSWORD

Debugging

Since MCP servers run over stdio, debugging can be challenging. For the best debugging experience, we strongly recommend using the MCP Inspector.

You can launch the MCP Inspector via npm with this command:

npx @modelcontextprotocol/inspector uv --directory /Users/markus/experiments/claude-mvp/cmd-line-executor run cmd-line-executor

Upon launching, the Inspector will display a URL that you can access in your browser to begin debugging.