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How to connect Microsoft To Do to Claude

Connect Claude Web, Desktop and Cowork to Microsoft To Do MCP. Create task for tomorrow's expense report, list overdue tasks from all lists, and more using natural language, with authentication handled for you.

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Microsoft To Do logoMicrosoft To Do
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Microsoft To Do is Microsoft’s cloud task management app for lists, tasks, checklist items, reminders, and due dates. It keeps personal and team work organized across devices through Microsoft Graph.

22 Tools

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 Microsoft To Do account to Claude via Composio Connect, enabling it to create task for tomorrow's expense report, list overdue tasks from all lists, add reminder to project checklist item, 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.

Also integrate Microsoft To Do with

ChatGPT Work

Connecting Microsoft To Do to Claude Web, Desktop, and Cowork

1. Open Customize

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

2. Add the Composio MCP server

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

3. 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

4. Connect your Microsoft To Do account

Back in Claude, ask it to connect to Microsoft To Do or give it any Microsoft To Do-related task.

For example, ask Claude to:

  • "Create task for tomorrow's expense report"
  • "List overdue tasks from all lists"
  • "Add reminder to project checklist item"

It will prompt you to authenticate and authorize access.

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

What is the Microsoft To Do Claude Connector, and what's possible with it?

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

Troubleshooting

1. Why does Claude not use the Composio connector for Microsoft To Do?

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

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

2. Why does Claude show an MCP server error before Microsoft To Do connects?

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

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

3. Why does the Microsoft To Do authorization link not work?

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

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

4. Why do Microsoft To Do actions fail after they worked before?

The Microsoft To Do connection can expire or lose permission.

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

5. How do I switch to a different Microsoft To Do account?

Claude can manage the Microsoft To Do connection for you.

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

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

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

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

Supported Tools

Every Microsoft To Do action and event your agent gets out of the box.

Complete Task

Mark a Microsoft To Do task as completed.

Create Checklist Item

Add a checklist item (subtask) to a Microsoft To Do task.

Create Task

Create a task in a Microsoft To Do task list.

Create Task List

Create a new Microsoft To Do task list.

Delete Checklist Item

Delete a checklist item (subtask) from a Microsoft To Do task.

Delete Task

Delete a task from a Microsoft To Do task list.

Delete Task Attachment

Permanently delete a file attachment from a Microsoft To Do task.

Delete Task List

Delete a Microsoft To Do task list.

Download Task Attachment

Download one file attached to a Microsoft To Do task.

Get Checklist Item

Get a single Microsoft To Do checklist item (subtask) by its id, within a task in a task list.

Get Current User

Return the profile of the Microsoft account connected to this toolkit (whoami / connection verification).

Get Task

Get a single Microsoft To Do task by its id, within a task list.

Get Task Attachment

Get metadata for one file attached to a Microsoft To Do task.

Get Task List

Get a single Microsoft To Do task list by its id.

List Checklist Items

List the checklist items (subtasks) of a To Do task.

List Task Attachments

List the files attached to a Microsoft To Do task.

List Task Lists

List the To Do task lists owned by the connected user.

List Tasks

List the tasks in a To Do task list.

Update Checklist Item

Update a checklist item (subtask) of a Microsoft To Do task: rename it (display_name) and/or check/uncheck it (is_checked).

Update Task

Update fields of an existing Microsoft To Do task (title, notes, importance, status, due/start/reminder dates, categories).

Update Task List

Rename a Microsoft To Do task list (updates its displayName).

Upload Task Attachment

Attach a file up to 25 MB to a Microsoft To Do task.

FRAMEWORKS

How to build Microsoft To Do MCP Agent with another framework

ChatGPT Work logo

ChatGPT Work

Use Microsoft To Do MCP with ChatGPT Work

FAQ

Frequently asked questions

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

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

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