CommandExecution

CommandExecution

3.1

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The Command Execution MCP Server allows Claude to execute shell commands on your local system securely.

Command Execution MCP Server for Claude Desktop

Overview

The Command Execution MCP (Model Context Protocol) Server is a secure, controlled tool that allows Claude to execute shell commands directly on your local system. This server provides a safe and flexible way to interact with your computer's command line through Claude's interface.

Key Features

  • Secure Command Execution: Runs shell commands with built-in safety checks
  • Working Directory Support: Execute commands in specific directories
  • Cross-Platform Compatibility: Works on macOS and other Unix-like systems
  • Extensive Error Handling: Provides detailed feedback on command execution
  • Timeout and Buffer Limits: Prevents runaway or resource-intensive commands

Security Measures

The server implements multiple layers of security:

  1. Dangerous Command Blocking

    • Prevents execution of potentially harmful commands like rm -rf, sudo, etc.
    • Blocks commands that could compromise system integrity
  2. Execution Constraints

    • Maximum execution time: 30 seconds
    • Maximum output buffer: 1MB
    • Validates working directory existence

Supported Tools

1. execute-command

Execute shell commands with optional working directory specification.

Parameters:

  • command (required): The shell command to execute
  • workingDirectory (optional): Specify the directory for command execution

Example Usage in Claude:

execute-command with command="ls -la" and workingDirectory="/Users/yourusername/Documents"

2. simple-hello

A basic demonstration tool that returns a greeting.

Parameters:

  • name (optional): Name to greet (defaults to "World")

Example Usage in Claude:

simple-hello with name="Claude"

Installation

1. Prerequisites

  • Node.js (v16 or later)
  • Claude Desktop
  • npm (Node Package Manager)

2. Install Dependencies

cd /path/to/command-execution-tool
npm install @modelcontextprotocol/sdk

3. Claude Desktop Configuration

Add the following to your Claude Desktop configuration file:

Location:

  • macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
  • Windows: %APPDATA%\Claude\claude_desktop_config.json

Configuration Block:

{
  "mcpServers": {
    "command-execution": {
      "command": "node",
      "args": [
        "/full/path/to/command-execution-tool.js"
      ],
      "env": {
        "NODE_OPTIONS": "--no-deprecation"
      }
    }
  }
}

Important: Replace /full/path/to/command-execution-tool.js with the actual path to the script.

Usage Guidelines

  • Be Cautious: Only run commands you understand
  • Security First: The tool prevents obviously dangerous commands
  • Working Directory: Specify a working directory for more controlled execution

Limitations

  • Does not support interactive commands
  • Maximum command execution time is 30 seconds
  • Output is limited to 1MB
  • Some system-critical commands are blocked

Contributing

Contributions are welcome! Please submit pull requests or open issues on the GitHub repository.

License

MIT License

Support

For issues or feature requests, please open a GitHub issue.