MCP System Server

A Model Context Protocol (MCP) server that provides system automation and control capabilities for Claude.

Features

• 🖥️ Command Execution: Run system commands safely
• 📊 System Information: Get CPU, memory, disk, and OS details
• 🔄 Process Management: List and kill processes
• 🌐 Network Tools: Check ports and network interfaces
• 🔧 Environment Variables: Get and set environment variables
• 💾 Disk Usage: Monitor disk space
• 🚀 Service Status: Check system service status (macOS/Linux)

Installation

1. Prerequisites:

   • Node.js 18+ installed

2. Install the MCP server:

   cd /Users/bard/Code/mcp-system
   npm install
   

3. Add to Claude Desktop config: Edit ~/Library/Application Support/Claude/claude_desktop_config.json:

   {
     "mcpServers": {
       "system": {
         "command": "node",
         "args": ["/Users/bard/Code/mcp-system/src/index.js"]
       }
     }
   }
   

4. Restart Claude Desktop

Usage

Execute Commands

// Run a simple command
system_exec({ command: "ls -la" })

// Run with specific working directory
system_exec({ 
  command: "npm install",
  cwd: "/path/to/project"
})

// Run with environment variables
system_exec({
  command: "echo $MY_VAR",
  env: { MY_VAR: "Hello World" }
})

System Information

// Get all system info
system_info({ type: "all" })

// Get specific info
system_info({ type: "cpu" })     // CPU details
system_info({ type: "memory" })  // Memory usage
system_info({ type: "os" })      // OS information
system_info({ type: "network" }) // Network interfaces

Process Management

// List all processes
process_list()

// Filter processes
process_list({ filter: "node" })

// Limit results
process_list({ limit: 10 })

// Kill a process
process_kill({ pid: 12345 })
process_kill({ pid: 12345, signal: "SIGKILL" })

Network Tools

// Check if a port is in use
port_check({ port: 3000 })
port_check({ port: 8080, host: "0.0.0.0" })

// Get network interface info
network_info()

Environment Variables

// Get all environment variables
env_get()

// Get specific variable
env_get({ variable: "PATH" })

// Set environment variable (for current process)
env_set({ variable: "MY_VAR", value: "my_value" })

Disk Usage

// Check disk usage
disk_usage()  // Default: root directory
disk_usage({ path: "/Users" })

Service Status (macOS/Linux)

// Check service status
service_status({ service: "nginx" })
service_status({ service: "postgresql" })

Tool Reference

Tool	Description	Required Args
system_exec	Execute system command	command
system_info	Get system information	None
process_list	List running processes	None
process_kill	Kill a process	pid
env_get	Get environment variables	None
env_set	Set environment variable	variable, value
service_status	Check service status	service
port_check	Check if port is in use	port
disk_usage	Get disk usage info	None
network_info	Get network interfaces	None

Security Considerations

This tool executes system commands with the same privileges as the Node.js process. Be careful when:

• Running commands that modify system files
• Killing processes
• Setting environment variables
• Executing untrusted commands

Platform Support

• ✅ macOS: Full support
• ✅ Linux: Full support
• ⚠️ Windows: Limited support (some features may not work)

Development

Testing the server:

# Run directly
node src/index.js

# Test with sample commands
echo '{"jsonrpc": "2.0", "method": "tools/list", "id": 1}' | node src/index.js

Common Issues

1. Permission denied: Some commands require elevated privileges
2. Command not found: Ensure the command is in PATH
3. Platform differences: Commands may vary between OS

License

MIT