Configurable Command MCP Server

A flexible MCP server that executes arbitrary command-line tools defined in a configuration file.

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Configurable Command MCP Server

A flexible Model Context Protocol (MCP) server that allows you to define and execute arbitrary command-line tools through configuration files. Perfect for giving Claude Desktop access to specific command-line utilities in a secure, controlled manner.

Features

  • 🛠️ Configuration-driven: Define tools via JSON without modifying code
  • 🔒 Secure execution: Parameter sanitization, directory restrictions, and command allowlisting
  • ⚡ Rate limiting: Prevent abuse with configurable execution limits
  • 📝 Parameter validation: Type checking, patterns, and required/optional parameters
  • 🎯 Directory scoping: Restrict tool execution to specific directories
  • ⏱️ Timeout control: Configurable execution timeouts per tool
  • 📊 Output management: Size limits and structured result formatting

Setup Instructions

1. Create the project directory and install dependencies

cd /Users/dewoller/code/generic_mcp npm install

2. Build the TypeScript code

npm run build

3. Configure your tools

Edit the tools.json file to define your command-line tools. The file is already configured with useful examples like:

  • list_files: List directory contents
  • grep_search: Search for patterns in files
  • word_count: Count lines/words/characters
  • git_status: Check git repository status
  • find_files: Find files by pattern
  • And more!

4. Configure Claude Desktop

Add the following to your Claude Desktop configuration file:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json

{ "mcpServers": { "command-executor": { "command": "node", "args": ["/Users/dewoller/code/generic_mcp/dist/index.js"], "env": { "CONFIG_PATH": "/Users/dewoller/code/generic_mcp/tools.json" } } } }

5. Restart Claude Desktop

After saving the configuration, restart Claude Desktop to load the MCP server.

Testing the Installation

Run Integration Tests

npm run test:integration

This will test several tools and show you their output.

Manual Testing in Development Mode

Run in development mode (with TypeScript)

npm run dev

Or run the built version

npm start

Usage Examples

Once configured, you can ask Claude to use these tools:

  • "List all JavaScript files in my code directory"
  • "Search for TODO comments in the project"
  • "Show me the git status"
  • "Count lines in all Python files"
  • "Find all markdown files"

Adding Custom Tools

To add a new tool, edit tools.json:

{ "name": "my_tool", "description": "Description for Claude", "command": "actual-command", "args": ["-flag", "{parameter}"], "parameters

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