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How to connect MongoDB MCP to Claude

Connect Claude Web, Desktop and Cowork to MongoDB MCP. List collections in your production database, query top slow queries from cluster, and more using natural language, with authentication handled for you.

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MongoDB MCP is MongoDB's managed interface for accessing Atlas resources and data. Use it for secure, centralized access to clusters, databases, and collections.

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Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your MongoDB account to Claude via Composio Connect, enabling it to list collections in your production database, query top slow queries from cluster, create index on users.email field, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

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ChatGPTHermesAtomic Agent

Connecting MongoDB to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your MongoDB account

Back in Claude, ask it to connect to MongoDB or give it any MongoDB-related task.

For example, ask Claude to:

  • "List collections in your production database"
  • "Query top slow queries from cluster"
  • "Create index on users.email field"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your MongoDB account is ready to use.

What is the MongoDB Claude Connector, and what's possible with it?

The MongoDB MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your MongoDB account. It provides structured and secure access so your agent can perform MongoDB operations on your behalf.

Troubleshooting

1. Why does Claude not use the Composio connector for MongoDB?

The connector can show as connected, but Claude must use it in each MongoDB conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to MongoDB again.

2. Why does Claude show an MCP server error before MongoDB connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for MongoDB.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect MongoDB.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the MongoDB authorization link not work?

The Composio connector is one server. Your MongoDB account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the MongoDB connection.
  • Composio creates a fresh MongoDB authorization link.
  • Open that link in your browser and finish the MongoDB sign-in.

4. Why do MongoDB actions fail after they worked before?

The MongoDB connection can expire or lose permission.

  • Ask Claude to inspect the MongoDB connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the MongoDB account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in MongoDB.
  • If the action still fails with a permission error, check that the connected account has that permission in MongoDB itself.

5. How do I switch to a different MongoDB account?

Claude can manage the MongoDB connection for you.

  • Ask Claude to disconnect or delete the current MongoDB account.
  • Ask Claude to connect MongoDB again.
  • Open the new Composio authorization link for MongoDB.
  • Sign in with the other MongoDB account in the browser.
  • After the account connects, ask Claude to retry the MongoDB task.

6. Why is my MongoDB connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your MongoDB connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If MongoDB tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect MongoDB.
TOOLS

Supported Tools

Every MongoDB MCP action and event your agent gets out of the box.

Aggregate

Run an aggregation against a MongoDB collection

Aggregate-db

Run an aggregation against a MongoDB database

Atlas-create-access-list

Allow Ip/CIDR ranges to access your MongoDB Atlas clusters.

Atlas-create-cluster

Create a MongoDB Atlas cluster (M10–M80, replica set or single shard, single or multi-region).

Atlas-create-db-user

Create an MongoDB Atlas database user

Atlas-create-free-cluster

Create a free MongoDB Atlas cluster

Atlas-create-project

Create a MongoDB Atlas project

Atlas-get-performance-advisor

Get MongoDB Atlas performance advisor recommendations and suggestions, which includes the operations: suggested indexes, drop index suggestions, schema suggestions, and a sample of the most recent (max 50) slow query logs

Atlas-inspect-access-list

Inspect Ip/CIDR ranges with access to your MongoDB Atlas clusters.

Atlas-inspect-cluster

Inspect metadata of a MongoDB Atlas cluster

Atlas-list-alerts

List triggered alerts for a MongoDB Atlas project.

Atlas-list-clusters

List MongoDB Atlas clusters

Atlas-list-db-users

List MongoDB Atlas database users

Atlas-list-orgs

List MongoDB Atlas organizations

Atlas-list-projects

List MongoDB Atlas projects.

Atlas-load-sample-dataset

Load a MongoDB sample dataset into an Atlas cluster, or check the status of a previously-initiated load.

Atlas-pause-resume-cluster

Pause or resume a dedicated (M10+) MongoDB Atlas cluster (Free and Flex clusters cannot be paused).

Atlas-streams-build

Create Atlas Stream Processing resources.

Atlas-streams-discover

Discover and inspect Atlas Stream Processing resources.

Atlas-streams-manage

Manage Atlas Stream Processing resources: start/stop processors, modify pipelines, update configurations.

Atlas-streams-teardown

Delete Atlas Stream Processing resources.

Atlas-upgrade-cluster

Upgrade a MongoDB Atlas cluster tier.

Collection-indexes

Describe the indexes for a collection

Collection-schema

Describe the schema for a collection

Collection-storage-size

Gets the size of the collection

Count

Gets the number of documents in a MongoDB collection using db.

Create-collection

Creates a new collection in a database.

Create-index

Create an index for a collection

Db-stats

Returns statistics that reflect the use state of a single database

Delete-many

Removes all documents that match the filter from a MongoDB collection

Drop-collection

Removes a collection or view from the database.

Drop-database

Removes the specified database, deleting the associated data files

Drop-index

Drop an index for the provided database and collection.

Explain

Returns statistics describing the execution of the winning plan chosen by the query optimizer for the evaluated method

Find

Run a find query against a MongoDB collection

Insert-many

Insert an array of documents into a MongoDB collection.

List-collections

List all collections for a given database

List-databases

List all databases for a MongoDB connection

Remote-atlas-connect

Connect to MongoDB Atlas cluster

Rename-collection

Renames a collection in a MongoDB database

Update-many

Updates all documents that match the specified filter for a collection.

FRAMEWORKS

How to build MongoDB MCP Agent with another framework

ChatGPT logo

ChatGPT

Use MongoDB MCP with ChatGPT

Hermes logo

Hermes

Use MongoDB MCP with Hermes

Atomic Agent logo

Atomic Agent

Use MongoDB MCP with Atomic Agent

FAQ

Frequently asked questions

With a standalone MongoDB MCP server, the agents and LLMs can only access a fixed set of MongoDB tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from MongoDB and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right MongoDB tools.

Yes, absolutely. You can configure which MongoDB scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your MongoDB data and credentials are handled as safely as possible.

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