File Operation MCP Server

import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js'; import { z } from 'zod'; import os from 'os'; import { exec } from 'child_process'; import { promisify } from 'util'; const execPromise = promisify(exec); export default function registerMonitorResourcesTool(server: McpServer) { server.registerTool( 'monitor-resources', { title: 'Monitor System Resources', description: 'Monitors CPU, memory, disk usage, and other system resources.', inputSchema: { detail_level: z.enum(['basic', 'detailed']).optional().default('basic').describe('Level of detail to show'), include_processes: z.boolean().optional().default(false).describe('Include top processes consuming resources'), max_processes: z.number().min(1).max(20).optional().default(10).describe('Maximum number of processes to show'), }, }, async (params: { detail_level?: 'basic' | 'detailed'; include_processes?: boolean; max_processes?: number }) => { try { const { detail_level = 'basic', include_processes = false, max_processes = 10 } = params; // Get basic system information const totalMemory = os.totalmem(); const freeMemory = os.freemem(); const usedMemory = totalMemory - freeMemory; const memoryUsagePercent = ((usedMemory / totalMemory) * 100).toFixed(1); const cpus = os.cpus(); const cpuCount = cpus.length; const loadAverage = os.loadavg(); // Get CPU usage (this is a simple approximation) const cpuUsage = ((loadAverage[0] / cpuCount) * 100).toFixed(1); let output = `# System Resource Monitor ## Memory Usage - Total: ${(totalMemory / 1024 / 1024 / 1024).toFixed(2)} GB - Used: ${(usedMemory / 1024 / 1024 / 1024).toFixed(2)} GB - Free: ${(freeMemory / 1024 / 1024 / 1024).toFixed(2)} GB - Usage: ${memoryUsagePercent}% ## CPU Usage - Cores: ${cpuCount} - Usage: ${cpuUsage}% - Load Average (1/5/15 min): ${loadAverage.map(l => l.toFixed(2)).join(', ')} ## Platform Info - Platform: ${os.platform()} - Architecture: ${os.arch()} - Uptime: ${Math.floor(os.uptime() / 3600)}h ${Math.floor((os.uptime() % 3600) / 60)}m `; if (detail_level === 'detailed') { try { // Get disk usage (Unix/Linux only) if (os.platform() !== 'win32') { const { stdout: dfOutput } = await execPromise('df -h /'); output += `\n## Disk Usage (Root)\n${dfOutput}`; } // Get network interfaces const networkInterfaces = os.networkInterfaces(); output += '\n## Network Interfaces\n'; for (const [name, interfaces] of Object.entries(networkInterfaces)) { if (interfaces) { for (const networkInterface of interfaces) { if (networkInterface.family === 'IPv4' && !networkInterface.internal) { output += `- ${name}: ${networkInterface.address}\n`; } } } } } catch (error) { // Ignore errors for additional details } } if (include_processes) { try { let processCommand = ''; if (os.platform() === 'win32') { processCommand = `powershell "Get-Process | Sort-Object CPU -Descending | Select-Object -First ${max_processes} | Format-Table ProcessName, CPU, WorkingSet -AutoSize"`; } else { processCommand = `ps aux --sort=-%cpu | head -n ${max_processes + 1} | awk '{print $1, $2, $3"%", $4"%", $11}'`; } const { stdout: processOutput } = await execPromise(processCommand); output += `\n## Top ${max_processes} Processes by CPU Usage\n`; output += processOutput; } catch (error) { output += '\n## Process Information (Unavailable)\nCould not retrieve process information.\n'; } } return { content: [{ type: 'text', text: output }], }; } catch (error: any) { return { content: [{ type: 'text', text: `Error monitoring resources: ${error.message}` }], isError: true, }; } } ); }