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mongodb_usage

Query MongoDB databases, inspect collection schemas, and analyze indexes through MCP tools.

Updated Jan 14, 2026
Search Tags:#mcp#aggregation#nosql#mongodb#database query#index optimization#schema inspection
One-click install
npx skills add https://github.com/jvsandhu/agentic-skills --skill mongodb-usage-jvsandhu
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: mongodb_usage
Source: https://github.com/jvsandhu/agentic-skills/tree/main/skills/mongodb_usage
Command: npx skills add https://github.com/jvsandhu/agentic-skills --skill mongodb-usage-jvsandhu

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? It lets you explore and query MongoDB databases directly from your AI workflow without writing connection boilerplate, while enforcing read-only safety and query performance best practices. ## Core Features & Use Cases - Database Discovery: List databases, collections, and schemas using mcp__mongodb__* tools to understand data structure before querying. - Read-Only Querying: Retrieve records, run aggregation pipelines, and inspect indexes without any risk of writes, updates, or deletes. - Performance Analysis: Check explain plans to detect COLLSCAN vs IXSCAN and get compound index suggestions for slow queries. - Use Case: Ask the agent to show all collections in your analytics database, inspect the schema of the orders collection, and run an aggregation that groups revenue by month. ## Quick Start Ask the agent to list all MongoDB databases and show the schema of a specific collection using the configured MONGODB_URI connection.

Frequently Asked Questions about mongodb_usage

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I query MongoDB from an AI agent workflow?▼

Use the MongoDB MCP server tools such as mcp__mongodb__list_databases, list_collections, and get_collection_schema to explore data, then run queries or aggregation pipelines. Set the MONGODB_URI environment variable before starting.

How to check if a MongoDB query uses an index?▼

Run an explain plan on the query and check whether it reports IXSCAN (index scan) or COLLSCAN (full collection scan). If you see COLLSCAN on a large collection, consider adding a compound index matching your filter fields.

Can I write or update documents through MongoDB MCP?▼

No. The MongoDB MCP server is configured in read-only mode, so only queries and data retrieval are supported. Write, update, and delete operations are not available through this integration.

What environment variable does MongoDB MCP require?▼

It requires MONGODB_URI, a connection string in the form mongodb://... pointing to your database. Configure it in your shell before using the plugin, otherwise the MCP tools cannot connect.

Why is my MongoDB aggregation query slow?▼

Slow aggregations usually come from filtering on unindexed fields, missing projections, or in-memory sorts exceeding limits. Filter on indexed fields first with $match, project only needed fields, and anchor regex patterns with ^ to use indexes.

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