# How to connect Microsoft To Do to Claude

```json
{
  "title": "How to connect Microsoft To Do to Claude",
  "toolkit": "Microsoft To Do",
  "toolkit_slug": "microsoft_todo",
  "framework": "Claude Cowork",
  "framework_slug": "claude-cowork",
  "url": "https://composio.dev/toolkits/microsoft_todo/framework/claude-cowork",
  "markdown_url": "https://composio.dev/toolkits/microsoft_todo/framework/claude-cowork.md",
  "updated_at": "2026-10-04T16:02:22.974Z"
}
```

## 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](https://composio.dev/toolkits/microsoft_todo/framework/chatgpt)
- [Grok Bot](https://composio.dev/toolkits/microsoft_todo/framework/grok-bot)

## Connect Microsoft To Do to Claude Cowork

### Connecting Microsoft To Do 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](https://claude.ai/customize/connectors?modal=add-custom-connector&connectorName=Composio&connectorUrl=https%3A%2F%2Fconnect.composio.dev%2Fmcp)
### Add manually
In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.
Click Add custom connector and paste in the Composio MCP server URL:

```bash
https://connect.composio.dev/mcp
```

## What is the Microsoft To Do MCP server, 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 to your task lists, tasks, checklist items, reminders, and attachments, so your agent can create, organize, update, complete, and delete tasks on your behalf.
- Task and list management: Have your agent create, rename, review, and delete task lists, then add or remove tasks as your plans change.
- Task planning and updates: Direct your agent to update task titles, notes, importance, status, due dates, start dates, reminders, and categories.
- Progress tracking: Let the agent list your tasks, retrieve task details, and mark finished work as completed.
- Checklist management: Instruct your agent to add, review, rename, check, uncheck, or delete checklist items within a task.
- Task attachment handling: Have your agent attach files to tasks, review available attachments, download needed files, or delete outdated ones.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `MICROSOFT_TODO_COMPLETE_TASK` | Complete Task | Mark a Microsoft To Do task as completed. Convenience wrapper that always PATCHes status='completed'; the server auto-sets completedDateTime. Use Update Task to reopen a task (status='notStarted') or to change other fields. |
| `MICROSOFT_TODO_CREATE_CHECKLIST_ITEM` | Create Checklist Item | Add a checklist item (subtask) to a Microsoft To Do task. Only display_name is required; the created item is returned with a GUID id, displayName, isChecked, and createdDateTime. |
| `MICROSOFT_TODO_CREATE_TASK` | Create Task | Create a task in a Microsoft To Do task list. Only title is required. Dates are passed as flat ISO-8601 strings plus a shared timezone; the tool builds the Graph dateTimeTimeZone objects. Notes are passed as body_content (+ body_content_type). NOTE: To Do treats due dates as whole days — the time component of due_date_time is normalized to midnight on save. |
| `MICROSOFT_TODO_CREATE_TASK_LIST` | Create Task List | Create a new Microsoft To Do task list. |
| `MICROSOFT_TODO_DELETE_CHECKLIST_ITEM` | Delete Checklist Item | Delete a checklist item (subtask) from a Microsoft To Do task. This permanently removes the checklist item (this cannot be undone). |
| `MICROSOFT_TODO_DELETE_TASK` | Delete Task | Delete a task from a Microsoft To Do task list. WARNING: this also permanently removes the task's checklist items and linked resources. |
| `MICROSOFT_TODO_DELETE_TASK_ATTACHMENT` | Delete Task Attachment | Permanently delete a file attachment from a Microsoft To Do task. This cannot be undone. |
| `MICROSOFT_TODO_DELETE_TASK_LIST` | Delete Task List | Delete a Microsoft To Do task list. WARNING: this cascades — all tasks in the list and their checklist items are permanently deleted. |
| `MICROSOFT_TODO_DOWNLOAD_TASK_ATTACHMENT` | Download Task Attachment | Download one file attached to a Microsoft To Do task. The file is offloaded to storage and returned as a downloadable reference rather than inline base64. |
| `MICROSOFT_TODO_GET_CHECKLIST_ITEM` | Get Checklist Item | Get a single Microsoft To Do checklist item (subtask) by its id, within a task in a task list. |
| `MICROSOFT_TODO_GET_CURRENT_USER` | Get Current User | Return the profile of the Microsoft account connected to this toolkit (whoami / connection verification). Useful to confirm which mailbox the To Do tasks belong to before other operations. |
| `MICROSOFT_TODO_GET_TASK` | Get Task | Get a single Microsoft To Do task by its id, within a task list. Set include_checklist_items=true to expand its checklist items inline. |
| `MICROSOFT_TODO_GET_TASK_ATTACHMENT` | Get Task Attachment | Get metadata for one file attached to a Microsoft To Do task. Use Download Task Attachment to retrieve the file contents. |
| `MICROSOFT_TODO_GET_TASK_LIST` | Get Task List | Get a single Microsoft To Do task list by its id. |
| `MICROSOFT_TODO_LIST_CHECKLIST_ITEMS` | List Checklist Items | List the checklist items (subtasks) of a To Do task. Auto-paginates so all subtasks are returned at once as {items: [...]}. |
| `MICROSOFT_TODO_LIST_TASK_ATTACHMENTS` | List Task Attachments | List the files attached to a Microsoft To Do task. Returns attachment metadata without file contents, one page at a time, plus a next_cursor. |
| `MICROSOFT_TODO_LIST_TASK_LISTS` | List Task Lists | List the To Do task lists owned by the connected user. The built-in default list has wellknown_list_name='defaultList'; user-created lists have wellknown_list_name='none'. Always returns at least the default list. Select the default list by id or wellknown_list_name, never by the localized display_name. |
| `MICROSOFT_TODO_LIST_TASKS` | List Tasks | List the tasks in a To Do task list. Checklist items (subtasks) are NOT returned by default; set include_checklist_items=true to expand them inline. Returns one page of tasks plus a next_cursor for the next page. |
| `MICROSOFT_TODO_UPDATE_CHECKLIST_ITEM` | 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). Partial update: only the fields you pass are changed; at least one is required. Setting is_checked=true marks the subtask done. |
| `MICROSOFT_TODO_UPDATE_TASK` | Update Task | Update fields of an existing Microsoft To Do task (title, notes, importance, status, due/start/reminder dates, categories). Partial update: only the fields you pass are changed; unset fields are left untouched. To mark a task done set status='completed' (or use the dedicated Complete Task tool). |
| `MICROSOFT_TODO_UPDATE_TASK_LIST` | Update Task List | Rename a Microsoft To Do task list (updates its displayName). |
| `MICROSOFT_TODO_UPLOAD_TASK_ATTACHMENT` | Upload Task Attachment | Attach a file up to 25 MB to a Microsoft To Do task. The tool automatically uses a single request for files under 3 MB and a chunked upload session for larger files. |

## Supported Triggers

None listed.

## 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.

## Creating MCP Server - Stand-alone vs Composio SDK

The Microsoft To Do MCP server connects Claude Web, Desktop, and Cowork to your Microsoft To Do account through Composio. Once connected, Claude can use the available Microsoft To Do tools and triggers to complete tasks on your behalf.

## Complete Code

None listed.

## How to build Microsoft To Do MCP Agent with another framework

- [ChatGPT](https://composio.dev/toolkits/microsoft_todo/framework/chatgpt)
- [Grok Bot](https://composio.dev/toolkits/microsoft_todo/framework/grok-bot)

## Related Toolkits

- [Google Sheets](https://composio.dev/toolkits/googlesheets) - Google Sheets is a cloud-based spreadsheet tool for real-time collaboration and data analysis. It lets teams work together from anywhere, updating information instantly.
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- [Airtable](https://composio.dev/toolkits/airtable) - Airtable combines the flexibility of spreadsheets with the power of a database for easy project and data management. Teams use Airtable to organize, track, and collaborate with custom views and automations.
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- [Google Tasks](https://composio.dev/toolkits/googletasks) - Google Tasks is a to-do list and task management tool integrated into Gmail and Google Calendar. It helps you organize, track, and complete tasks across your Google ecosystem.
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- [Boxhero](https://composio.dev/toolkits/boxhero) - Boxhero is a cloud-based inventory management platform for SMBs, offering real-time updates, barcode scanning, and team collaboration. It helps businesses streamline stock tracking and analytics for smarter inventory decisions.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Microsoft To Do MCP?

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.

### Can I use Tool Router MCP with Claude Cowork?

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.

### Can I manage the permissions and scopes for Microsoft To Do while using Tool Router?

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.

### How safe is my data with Composio Tool Router?

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.

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)