MCP MongoDB Server

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A Model Context Protocol server that enables LLMs to interact with MongoDB databases. This server provides capabilities for inspecting collection schemas and executing MongoDB operations through a standardized interface.

Demo

Key Features

• Smart ObjectId Handling - Configurable auto/none/force modes for string-to-ObjectId conversion
• Read-Only Mode - Protection against write operations, uses secondary read preference
• Schema Inference - Automatic collection schema detection from document samples
• Query & Aggregation - Full MongoDB query and aggregation pipeline support with optional explain plans
• Write Operations - Insert, update, and index creation (when not in read-only mode)
• Collection Completions - Auto-complete collection names for LLM integration

Installation

npx -y mcp-mongo-server mongodb://localhost:27017/database

Usage

# Start server with MongoDB URI
npx -y mcp-mongo-server mongodb://muhammed:kilic@localhost:27017/database

# Connect in read-only mode
npx -y mcp-mongo-server mongodb://muhammed:kilic@localhost:27017/database --read-only

Environment Variables

Variable	Description
MCP_MONGODB_URI	MongoDB connection URI
MCP_MONGODB_READONLY	Enable read-only mode ("true")

Documentation

• Integration Guide - Claude Desktop, Windsurf, Cursor, Docker
• Available Tools - Query, aggregate, update, insert, and more
• Development - Setup, scripts, and debugging
• Contributing

License

MIT - see LICENSE for details.