Microsoft To Do MCP Server

Microsoft-To-Do-MCP-Server

An MCP server that connects Claude (or any MCP-compatible client) to Microsoft To Do through the Microsoft Graph API — letting Claude read and manage your task lists and tasks on your behalf.

Runs entirely on your machine over stdio. No remote server ever sees your tasks or your tokens.

Features

Related MCP server: todo-mcp

Prerequisites

• Node.js 18 or newer

• A Microsoft account (personal or work/school)

• Claude Desktop or another MCP-compatible client

1. Register an app in Azure AD

This server authenticates as your own Azure AD app registration, so you'll need to create one (free, takes a couple of minutes):

1. Go to the Azure Portal → App registrations and click New registration.

2. Give it a name (e.g. "Microsoft To Do MCP"), and under Supported account types choose an option that includes personal Microsoft accounts, unless you only intend to use a work/school account.

3. Under Redirect URI, select platform "Mobile and desktop applications" and add:

   http://localhost:3000/callback

4. Click Register, then copy the Application (client) ID from the overview page — you'll need it later.

5. Go to Authentication and enable "Allow public client flows", then save.

6. Go to API permissions → Add a permission → Microsoft Graph → Delegated permissions, and add:

   • Tasks.ReadWrite

   • offline_access

   • User.Read

2. Install & build

Clone this repository, then from the project folder:

git clone https://github.com/hoaaah/Microsoft-To-Do-MCP-Server.git
cd Microsoft-To-Do-MCP-Server
npm install
npm run build

This compiles the TypeScript source into dist/index.js.

3. Configure AI Client / Claude Desktop

Open your AI Client / Claude Desktop config file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json

• Windows: %APPDATA%\Claude\claude_desktop_config.json

Add the following entry, replacing PATH_TO_THIS_FOLDER with the absolute path to where you cloned this repo, and MS_TODO_CLIENT_ID with the Application (client) ID from Azure:

{
  "mcpServers": {
    "microsoft-todo": {
      "command": "node",
      "args": ["PATH_TO_THIS_FOLDER/dist/index.js"],
      "env": {
        "MS_TODO_CLIENT_ID": "your-azure-client-id-here"
      }
    }
  }
}

Save the file and restart Claude Desktop.

4. First sign-in

The first time Claude calls one of the todo_* tools, your default browser will open automatically, asking you to sign in with your Microsoft account and approve the Tasks.ReadWrite permission. Once you approve, the token is cached locally at:

~/.microsoft-todo-mcp/token-cache.json

Subsequent sign-ins are silent — the cached refresh token is reused automatically as long as it hasn't expired or been revoked, so you won't need to log in again.

Revoking access

To force a fresh sign-in, delete the cache file:

~/.microsoft-todo-mcp/token-cache.json

To fully revoke the app's access to your account, go to:

• account.live.com/consent/Manage for personal Microsoft accounts

• Azure AD → Enterprise Applications for work/school accounts

Security notes

• This server runs locally on your machine over stdio — there is no remote server storing or relaying your tokens.

• todo_delete_task_list and todo_delete_task are destructive and cannot be undone. Claude will ask for confirmation before calling them.

• Your Azure app's client ID is not a secret and is safe to keep in your local config, but you should not commit it to a public repository alongside real task data or tokens.

Troubleshooting

• Browser doesn't open on first sign-in: make sure port 3000 is free, and that the redirect URI in your Azure app registration exactly matches http://localhost:3000/callback.

• "Need admin approval" error: your organization may require an admin to consent to the requested permissions — contact your Microsoft 365 administrator, or use a personal Microsoft account instead.

• Claude doesn't see the tools: double-check the path in claude_desktop_config.json points to the built dist/index.js, and that you restarted Claude Desktop after editing the config.

License

MIT

Creator

This MCP was created by and is maintained by Heru Arief Wijaya.

• https://twitter.com/hoaaah

• https://github.com/hoaaah