MCP MongoDB Server

A Model Context Protocol server that provides access to MongoDB databases. This server enables LLMs to inspect collection schemas and execute read-only queries.

Demo

Features

Resources

• List and access collections via mongodb:// URIs
• Each collection has a name, description and schema
• JSON mime type for schema access

Tools

• query

  • Execute read-only MongoDB queries against the connected database
  • Input: query (object): The MongoDB query to execute
  • All queries are executed with read-only permissions

• aggregate

  • Execute read-only MongoDB queries against the connected database
  • Input: aggregate (object): The MongoDB query to execute
  • All queries are executed with read-only permissions

Prompts

• query - Provide insights about the collection's structure, data types, and basic statistics
  • Input: collection (string): The name of the collection to analyze
  • Output: text (string): A summary of the collection's structure, data types, and basic statistics
• aggregate - Provide insights about the collection's structure, data types, and basic statistics
  • Input: collection (string): The name of the collection to analyze
  • Output: text (string): A summary of the collection's structure, data types, and basic statistics

Development

Install dependencies:

npm install

Build the server:

npm run build

For development with auto-rebuild:

npm run watch

Installation

To use with Claude Desktop, add the server config:

On MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json

On Windows: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mongodb": {
      "command": "node",
      "args": [
        "~/mcp-mongo-server/build/index.js",
        "mongodb://muhammed:kilic@mongodb.localhost/namespace"
      ]
    },
  }
}

Debugging

Since MCP servers communicate over stdio, debugging can be challenging. We recommend using the MCP Inspector, which is available as a package script:

npm run inspector

The Inspector will provide a URL to access debugging tools in your browser.

Components

Resources

The server provides schema information for each collection in the database:

• Collection Schemas (mongodb://<host>/<collection>/schema)
  • JSON schema information for each collection
  • Includes field names and data types
  • Automatically inferred from collection documents

Usage with Claude Desktop

To use this server with the Claude Desktop app, add the following configuration to the "mcpServers" section of your claude_desktop_config.json:

{
  "mcpServers": {
    "mongodb": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-mongo-server",
        "mongodb://muhammed:kilic@mongodb.localhost/sample_namespace"
      ]
    }
  }
}

Replace /sample_namespace with your database name.

License

This MCP server is licensed under the MIT License. This means you are free to use, modify, and distribute the software, subject to the terms and conditions of the MIT License. For more details, please see the LICENSE file in the project repository.