MongoDB MCP server

This MongoDB MCP server enables Large Language Models (LLMs) to interact with MongoDB databases through natural language. It allows querying collections, inspecting schemas, and managing data without writing complex queries or code.

Installation

Prerequisites

• Node.js 18+
• npx
• MCP Client (Claude Desktop App)

Installation Options

Installing via Smithery

The easiest way to install MongoDB MCP Server for Claude Desktop is via Smithery:

npx -y @smithery/cli install mongo-mcp --client claude

Manual Installation

You can also configure it manually by adding the server to your Claude Desktop config file.

Find your MongoDB connection URL and add this configuration to:

• MacOS: ~/Library/Application\ Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mongodb": {
      "command": "npx",
      "args": [
        "mongo-mcp",
        "mongodb://<username>:<password>@<host>:<port>/<database>?authSource=admin"
      ]
    }
  }
}

Setting Up a Test Sandbox

If you don't have a MongoDB server to connect to, you can create a test sandbox:

1. Start MongoDB using Docker Compose:

docker-compose up -d

2. Seed the database with test data:

npm run seed

3. Configure Claude Desktop for local development:

{
  "mcpServers": {
    "mongodb": {
      "command": "node",
      "args": [
        "dist/index.js",
        "mongodb://root:example@localhost:27017/test?authSource=admin"
      ]
    }
  }
}

Usage

Example Prompts

Basic Operations

"What collections are available in the database?"
"Show me the schema for the users collection"
"Find all users in San Francisco"

Advanced Queries

"Find all electronics products that are in stock and cost less than $1000"
"Show me all orders from the user [email protected]"
"List the products with ratings above 4.5"

Index Management

"What indexes exist on the users collection?"
"Create an index on the products collection for the 'category' field"
"List all indexes across all collections"

Document Operations

"Insert a new product with name 'Gaming Laptop' in the products collection"
"Update the status of order with ID X to 'shipped'"
"Find and delete all products that are out of stock"

Available Tools

The MCP server provides several tools for interacting with MongoDB:

Query Tools

• find: Query documents with filtering and projection
• listCollections: List available collections
• insertOne: Insert a single document
• updateOne: Update a single document
• deleteOne: Delete a single document

Index Tools

• createIndex: Create a new index
• dropIndex: Remove an index
• indexes: List indexes for a collection

Test Sandbox Data Structure

The seed script creates three collections with sample data:

Users

• Personal info (name, email, age)
• Nested address with coordinates
• Arrays of interests
• Membership dates

Products

• Product details (name, SKU, category)
• Nested specifications
• Price and inventory info
• Tags and ratings

Orders

• Order details with items
• User references
• Shipping and payment info
• Status tracking

How to add this MCP server to 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 > MCP and click "Add new global MCP server".

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

{
    "mcpServers": {
        "cursor-rules-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "cursor-rules-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 explictly ask the agent to use the tool by mentioning the tool name and describing what the function does.