How to connect MotherDuck MCP to Claude

Connect Claude Web, Desktop and Cowork to MotherDuck MCP. Explore schemas in motherduck databases, query flight data in motherduck, and more using natural language, with authentication handled for you.

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MotherDuck MCP is MotherDuck's official hosted server for database access and management. It provides a secure bridge to MotherDuck data, schemas, and database operations.

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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 MotherDuck account to Claude via Composio Connect, enabling it to explore schemas in MotherDuck databases, query flight data in MotherDuck, schedule Python jobs for MotherDuck, 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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Connecting MotherDuck 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 MotherDuck account

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

For example, ask Claude to:

  • "Explore schemas in MotherDuck databases"
  • "Query flight data in MotherDuck"
  • "Schedule Python jobs for MotherDuck"

It will prompt you to authenticate and authorize access.

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

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

The MotherDuck MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your MotherDuck account. It provides structured and secure access to your databases, schemas, tables, views, and curated data guidance, so your agent can explore data, run SQL queries, manage scheduled Python jobs, and create or share data dives on your behalf.

  • Database and schema exploration: Have your agent list databases, tables, views, columns, macros, and shares, or search the catalog to find the data you need.
  • Data analysis and SQL: Instruct your agent to consult your organization’s query guidance, run read-only DuckDB queries, and execute SQL that changes data, schemas, or connection state.
  • Scheduled data jobs: Let the agent create, edit, run, monitor, and cancel MotherDuck flights, then retrieve their run history, logs, and versions.
  • Interactive data dives: Direct your agent to create, read, edit, share, and delete dives that present MotherDuck data through JSX and React components.
  • Data documentation and access: Have your agent create, update, browse, and delete markdown guides, then set whether each guide is private or visible to the organization.

Troubleshooting

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

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

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

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

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

  • 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 MotherDuck.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the MotherDuck authorization link not work?

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

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

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

The MotherDuck connection can expire or lose permission.

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

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

Claude can manage the MotherDuck connection for you.

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

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

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

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If MotherDuck 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 MotherDuck.
TOOLS

Supported Tools

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

Ask docs question

Ask a question about DuckDB or MotherDuck.

Cancel flight run

Cancel an in-flight run of a flight.

Create flight

Create a new MotherDuck flight.

Create guide

Create a new guide — a markdown document that agents read to answer this org's data questions correctly (metric definitions, join/filter conventions, pitfalls).

Delete dive

Delete a dive by ID.

Delete flight

Permanently delete a flight, its versions, schedule, and run history.

Delete guide

Soft-delete a guide while preserving its version history.

Dive query

Execute a read-only DuckDB query on behalf of a dive.

Edit dive content

Edit a dive's content by applying one or more text replacements, then save to MotherDuck.

Edit flight source

Edit a flight's source_code by applying one or more text replacements, then save as a new FlightVersion.

Edit guide content

Edit a guide's markdown body by applying one or more text replacements, then save as a new version.

Get dive guide

Load instructions for creating MotherDuck dives.

Get flight

Fetch a flight by UUID.

Get flight guide

Load instructions for authoring, scheduling, running, and troubleshooting MotherDuck flights.

Get flight logs

Fetch the plain-text logs (stdout + stderr) of a flight run plus the matching `Run` record (status, exit_code, timing).

Get flight run

Fetch a single run of a flight by its sequential run number (from list_flight_runs).

Get guide

Load a guide by uuid.

Get query guide

Call this before writing SQL to answer a data question.

Get short lived token

Returns a short-lived token and connection details for the MotherDuck database endpoint.

List columns

List all columns of a table or view with their types and comments.

List databases

List all databases in your MotherDuck account.

List dives

List all dives in MotherDuck.

List flight runs

List executions of a flight, newest first.

List flights

List MotherDuck flights.

List flight versions

List the immutable versions of a flight, newest first.

List guides

Browse this organization's curated guides — markdown documents that capture organization and personal context about the data in MotherDuck.

List macros

List all macros (table and scalar macros) in a MotherDuck database, with their schema and parameters.

List shares

List all database shares that have been shared with you.

List tables

List all tables and views in a MotherDuck database with comments.

List views

List all views in a MotherDuck database, with their schema, comment, and column count.

Log dive viewer event

Log a dive viewer event for analytics.

Mint dive state reference

Mint a server-stored reference for a `useDiveState` bag and return its id.

Query

Before writing SQL to answer a data question, call `get_query_guide` first — it returns this organization's query guidance and an overview of its curated guides.

Query rw

Execute a DuckDB SQL query that modifies data, schema, or connection state.

Read dive

Read a specific dive by ID, including its full JSX/React component code.

Run flight

Trigger an on-demand execution of a flight using its current version.

Save dive

Save a new dive to MotherDuck.

Search catalog

Search the catalog for databases, schemas, tables, columns, and shares using fuzzy matching.

Set guide access

Set a guide's visibility to 'user' (private to the owner) or 'organization' (visible to the whole org).

Share dive data

Share the data for a dive with your organization.

Update dive

Update an existing dive's title, description, or content.

Update flight

Update a flight.

Update guide

Append a new version to an existing guide, identified by `uuid`.

Update guide metadata

Change a guide's title, description, or topic without appending a content version.

View dive

Open and render a MotherDuck Dive as a live MCP app with interactive charts.

FAQ

Frequently asked questions

With a standalone MotherDuck MCP server, the agents and LLMs can only access a fixed set of MotherDuck tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from MotherDuck 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 MotherDuck tools.

Yes, absolutely. You can configure which MotherDuck 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 MotherDuck data and credentials are handled as safely as possible.

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