MongoDB MCP server

This MCP server provides functionality for MongoDB connections, queries, and document insertions. It offers a streamlined way to interact with MongoDB databases through a simple protocol implementation.

Installation

Prerequisites

• Node.js and npm installed
• MongoDB instance running

Step 1: Install Package

Install the package using npm:

npm install mongo-mcp

Usage

Connecting to MongoDB

First, import the package and initialize a connection:

const MongoMCP = require('mongo-mcp');

// Connect to MongoDB
const mongoClient = new MongoMCP({
  host: 'localhost',
  port: 27017,
  database: 'myDatabase'
});

// Check connection status
mongoClient.connect()
  .then(() => {
    console.log('Connected to MongoDB successfully');
  })
  .catch(err => {
    console.error('Connection failed:', err);
  });

Querying Documents

To query documents from a collection:

// Simple query
mongoClient.find('users', { age: { $gt: 18 } })
  .then(results => {
    console.log('Found users:', results);
  })
  .catch(err => {
    console.error('Query failed:', err);
  });

// Query with options
const queryOptions = {
  sort: { name: 1 },
  limit: 10,
  skip: 5
};

mongoClient.find('users', { status: 'active' }, queryOptions)
  .then(results => {
    console.log('Found users with options:', results);
  });

Inserting Documents

To insert a new document or multiple documents:

// Insert a single document
const newUser = {
  name: 'John Doe',
  email: '[email protected]',
  age: 30
};

mongoClient.insertOne('users', newUser)
  .then(result => {
    console.log('Inserted user with ID:', result.insertedId);
  })
  .catch(err => {
    console.error('Insertion failed:', err);
  });

// Insert multiple documents
const newUsers = [
  { name: 'Jane Smith', email: '[email protected]', age: 25 },
  { name: 'Bob Johnson', email: '[email protected]', age: 42 }
];

mongoClient.insertMany('users', newUsers)
  .then(result => {
    console.log(`Inserted ${result.insertedCount} users`);
  });

Closing the Connection

Always close the connection when you're done:

mongoClient.close()
  .then(() => {
    console.log('Connection closed');
  })
  .catch(err => {
    console.error('Error closing connection:', err);
  });

Configuration Options

You can customize the MongoDB connection with these options:

const options = {
  host: 'mongodb-server.example.com', // MongoDB server host
  port: 27017,                        // MongoDB server port
  database: 'myDatabase',             // Database name
  username: 'dbuser',                 // Optional username for authentication
  password: 'dbpassword',             // Optional password for authentication
  options: {                          // Additional MongoDB driver options
    useNewUrlParser: true,
    useUnifiedTopology: true
  }
};

const mongoClient = new MongoMCP(options);

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "mongo-mcp" '{"command":"npx","args":["-y","mongo-mcp"]}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "mongo-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "mongo-mcp"
            ]
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

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

2. Add this to your configuration file:

{
    "mcpServers": {
        "mongo-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "mongo-mcp"
            ]
        }
    }
}

3. Restart Claude Desktop for the changes to take effect