Summary
The MCP MongoDB Server enables large language models to interact with MongoDB databases through a standardized protocol, providing tools for schema inspection, querying, aggregation, and write operations. It offers features including configurable ObjectId handling, read-only mode for safe operations, automatic schema inference from document samples, and full support for MongoDB queries and aggregation pipelines. This server solves the problem of giving LLMs safe, structured access to MongoDB data while maintaining control over read/write permissions and query execution.
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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.
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