Essential TypeScript utility library for Model Context Protocol (MCP) server development with Claude Desktop integration. This production-ready utility package provides comprehensive tools for building robust MCP servers with MongoDB connectivity, encryption, cross-platform configuration management, and more.

• 🔧 MCP Server Utilities: Core utilities for building Model Context Protocol servers
• 🗄️ MongoDB Integration: Simplified database connectivity with error handling
• 🔐 AES-256-GCM Encryption: Secure token encryption and decryption
• ⚙️ Claude Configuration: Automatic Claude Desktop config updates across platforms
• 🔌 Port Management: Smart port killing and process management
• 📝 Logging & Error Handling: Structured console logging and error reporting
• 🌐 Cross-Platform: Full support for macOS, Windows, and Linux
• 📦 TypeScript Ready: Full TypeScript support with type definitions

# Install from GitHub
npm install github:pdas9647/MCP-Utils#master

# Or add to package.json
"mcp-utils": "github:pdas9647/MCP-Utils#master"

import {
    connect,                    // MongoDB connection
    encryptToken, decryptToken, // Encryption utilities
    addOrUpdateMCPServer,       // Claude config management
    killPortOnLaunch,          // Port management
    printInConsole,            // Console logging
    sendError                  // Error handling
} from 'mcp-utils/utils';

import {connect} from 'mcp-utils/utils';
import {StdioServerTransport} from "@modelcontextprotocol/sdk/server/stdio.js";

const transport = new StdioServerTransport();
const MONGODB_URI = process.env.MONGODB_URI;
const db = await connect(transport, MONGODB_URI, 'your-database-name');

import {encryptToken, decryptToken} from 'mcp-utils/utils';

const TOKEN_SECRET = 'your-32-byte-hex-secret';
const plainText = 'sensitive-data';

// Encrypt
const encrypted = encryptToken(TOKEN_SECRET, plainText);
console.log(encrypted); // { iv: '...', content: '...', tag: '...' }

// Decrypt
const decrypted = decryptToken(TOKEN_SECRET, encrypted);
console.log(decrypted); // 'sensitive-data'

import {addOrUpdateMCPServer, setEntry} from 'mcp-utils/utils';

// Create server entry
const {entry} = setEntry('your-project-name');

// Add/update MCP server in Claude Desktop config
await addOrUpdateMCPServer('server-name', entry);

import {killPortOnLaunch, freezePortOnQuit} from 'mcp-utils/utils';

// Kill processes using a specific port
await killPortOnLaunch(3000);

// Monitor parent process and exit when it dies
freezePortOnQuit();

import {printInConsole, sendError} from 'mcp-utils/utils';
import {StdioServerTransport} from "@modelcontextprotocol/sdk/server/stdio.js";

const transport = new StdioServerTransport();

// Log messages to console
await printInConsole(transport, 'Server started successfully');

// Send structured errors
try {
    // Some operation
} catch (error) {
    sendError(transport, error instanceof Error ? error : new Error(String(error)), 'operation-context');
}

The library provides full cross-platform support for:

• macOS: ~/Library/Application Support/Claude/
• Windows: %APPDATA%\Claude\
• Linux: ~/.config/Claude/

This utility library powers several production MCP servers:

Complete GitHub integration with repository management, issue tracking, and collaboration features.

// Usage example from GitHub-MCP
import {addOrUpdateMCPServer, freezePortOnQuit, killPortOnLaunch, printInConsole, setEntry} from "mcp-utils/utils";

await killPortOnLaunch(PORT);
const {entry} = setEntry('') as any;
await addOrUpdateMCPServer('github', entry);

Google Drive, Sheets, and Docs integration for comprehensive workspace management.

Local file system operations with cross-platform support for macOS, Windows & Linux.

• AES-256-GCM Encryption: Industry-standard encryption for sensitive data
• Secure Token Management: Proper IV generation and authentication tags
• Error Context Isolation: Structured error handling without exposing sensitive information
• Development/Production Modes: Stack traces only in development environment

• Node.js 18+
• TypeScript 5.8+
• MongoDB (for database utilities)

npm run build    # Compile TypeScript
npm run dev      # Development mode

mcp-utils/
├── src/
│   └── server.ts           # Example server
├── utils/
│   ├── tool.ts           # Main exports
│   ├── db.ts              # MongoDB utilities
│   ├── encryption.ts      # Crypto utilities
│   ├── updateClaudeConfig.ts # Claude config
│   ├── killPortOnLaunch.ts   # Port management
│   ├── printInConsole.ts     # Logging
│   ├── sendError.ts          # Error handling
│   └── directory.ts          # Path utilities
├── package.json
└── tsconfig.json

MIT License - see LICENSE file for details.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

• Model Context Protocol - Official MCP documentation
• Claude Desktop - Anthropic's Claude Desktop application
• @modelcontextprotocol/sdk - Official MCP SDK

• Language: TypeScript
• Dependencies: 2 (crypto-js, mongodb)
• Zero Runtime Dependencies: Core utilities with minimal footprint
• Cross-Platform: macOS, Windows, Linux support
• Production Ready: Used in multiple production MCP servers