Microsoft To Do

Access the Microsoft To Do API with managed OAuth authentication. Manage task lists, tasks, checklist items, and linked resources with full CRUD operations.

Quick Start

# List all task lists
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/microsoft-to-do/v1.0/me/todo/lists')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Base URL

https://api.maton.ai/microsoft-to-do/{native-api-path}

Maton proxies requests to graph.microsoft.com and automatically injects your OAuth token.

Authentication

All requests require the Maton API key in the Authorization header:

Authorization: Bearer $MATON_API_KEY

Environment Variable: Set your API key as MATON_API_KEY:

export MATON_API_KEY="YOUR_API_KEY"

Getting Your API Key

1. Sign in or create an account at maton.ai
2. Go to maton.ai/settings
3. Copy your API key

Connection Management

Manage your Microsoft To Do OAuth connections at https://api.maton.ai.

List Connections

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections?app=microsoft-to-do&status=ACTIVE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Create Connection

python <<'EOF'
import urllib.request, os, json
data = json.dumps({'app': 'microsoft-to-do'}).encode()
req = urllib.request.Request('https://api.maton.ai/connections', data=data, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Content-Type', 'application/json')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Get Connection

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections/{connection_id}')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "connection": {
    "connection_id": "{connection_id}",
    "status": "ACTIVE",
    "creation_time": "2025-12-08T07:20:53.488460Z",
    "last_updated_time": "2026-01-31T20:03:32.593153Z",
    "url": "https://connect.maton.ai/?session_token=...",
    "app": "microsoft-to-do",
    "metadata": {}
  }
}

Open the returned url in a browser to complete OAuth authorization.

Delete Connection

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections/{connection_id}', method='DELETE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Specifying Connection

If you have multiple Microsoft To Do connections, specify which one to use with the Maton-Connection header:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/microsoft-to-do/v1.0/me/todo/lists')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Maton-Connection', '{connection_id}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

If you have multiple connections, always include this header to ensure requests go to the intended account.

Security & Permissions

• Access is scoped to task lists, tasks, checklist items, and linked resources within the connected Microsoft To Do account.
• All write operations require explicit user approval. Before executing any create, update, or delete call, confirm the target resource and intended effect with the user.

API Reference

Task List Operations

List Task Lists

GET /microsoft-to-do/v1.0/me/todo/lists

Response:

{
  "value": [
    {
      "id": "AAMkADIyAAAhrbPWAAA=",
      "displayName": "Tasks",
      "isOwner": true,
      "isShared": false,
      "wellknownListName": "defaultList"
    }
  ]
}

Get Task List

GET /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}

Create Task List

POST /microsoft-to-do/v1.0/me/todo/lists
Content-Type: application/json

{
  "displayName": "Travel items"
}

Response (201 Created):

{
  "id": "AAMkADIyAAAhrbPWAAA=",
  "displayName": "Travel items",
  "isOwner": true,
  "isShared": false,
  "wellknownListName": "none"
}

Update Task List

PATCH /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}
Content-Type: application/json

{
  "displayName": "Vacation Plan"
}

Delete Task List

DELETE /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}

Returns 204 No Content on success.

Task Operations

List Tasks

GET /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}/tasks

Response:

{
  "value": [
    {
      "id": "AlMKXwbQAAAJws6wcAAAA=",
      "title": "Buy groceries",
      "status": "notStarted",
      "importance": "normal",
      "isReminderOn": false,
      "createdDateTime": "2024-01-15T10:00:00Z",
      "lastModifiedDateTime": "2024-01-15T10:00:00Z",
      "body": {
        "content": "",
        "contentType": "text"
      },
      "categories": []
    }
  ]
}

Get Task

GET /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}/tasks/{taskId}

Create Task

POST /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}/tasks
Content-Type: application/json

{
  "title": "A new task",
  "importance": "high",
  "status": "notStarted",
  "categories": ["Important"],
  "dueDateTime": {
    "dateTime": "2024-12-31T17:00:00",
    "timeZone": "Eastern Standard Time"
  },
  "startDateTime": {
    "dateTime": "2024-12-01T08:00:00",
    "timeZone": "Eastern Standard Time"
  },
  "isReminderOn": true,
  "reminderDateTime": {
    "dateTime": "2024-12-01T09:00:00",
    "timeZone": "Eastern Standard Time"
  },
  "body": {
    "content": "Task details here",
    "contentType": "text"
  }
}

Task Fields:

Update Task

PATCH /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}/tasks/{taskId}
Content-Type: application/json

{
  "status": "completed",
  "completedDateTime": {
    "dateTime": "2024-01-20T15:00:00",
    "timeZone": "UTC"
  }
}

Delete Task

DELETE /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}/tasks/{taskId}

Returns 204 No Content on success.

Checklist Item Operations

Checklist items are subtasks within a task.

List Checklist Items

GET /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}/tasks/{taskId}/checklistItems

Response:

{
  "value": [
    {
      "id": "51d8a471-2e9d-4f53-9937-c33a8742d28f",
      "displayName": "Create draft",
      "createdDateTime": "2024-01-17T05:22:14Z",
      "isChecked": false
    }
  ]
}

Create Checklist Item

POST /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}/tasks/{taskId}/checklistItems
Content-Type: application/json

{
  "displayName": "Final sign-off from the team"
}

Update Checklist Item

PATCH /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}/tasks/{taskId}/checklistItems/{checklistItemId}
Content-Type: application/json

{
  "isChecked": true
}

Delete Checklist Item

DELETE /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}/tasks/{taskId}/checklistItems/{checklistItemId}

Returns 204 No Content on success.

Linked Resource Operations

Linked resources connect tasks to external items (e.g., emails, files).

List Linked Resources

GET /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}/tasks/{taskId}/linkedResources

Response:

{
  "value": [
    {
      "id": "f9cddce2-dce2-f9cd-e2dc-cdf9e2dccdf9",
      "webUrl": "https://example.com/item",
      "applicationName": "MyApp",
      "displayName": "Related Document",
      "externalId": "external-123"
    }
  ]
}

Create Linked Resource

POST /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}/tasks/{taskId}/linkedResources
Content-Type: application/json

{
  "webUrl": "https://example.com/item",
  "applicationName": "MyApp",
  "displayName": "Related Document",
  "externalId": "external-123"
}

Delete Linked Resource

DELETE /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}/tasks/{taskId}/linkedResources/{linkedResourceId}

Returns 204 No Content on success.

Pagination

Microsoft Graph uses OData pagination. Use $top to limit results and $skip for offset:

GET /microsoft-to-do/v1.0/me/todo/lists/{todoTaskListId}/tasks?$top=10&$skip=0

Response includes @odata.nextLink when more results exist:

{
  "value": [...],
  "@odata.nextLink": "https://graph.microsoft.com/v1.0/me/todo/lists/{id}/tasks?$skip=10"
}

Code Examples

JavaScript

const response = await fetch(
  'https://api.maton.ai/microsoft-to-do/v1.0/me/todo/lists',
  {
    headers: {
      'Authorization': `Bearer ${process.env.MATON_API_KEY}`
    }
  }
);
const data = await response.json();

Python

import os
import requests

response = requests.get(
    'https://api.maton.ai/microsoft-to-do/v1.0/me/todo/lists',
    headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'}
)
data = response.json()

Notes

• Task list IDs and task IDs are opaque strings (e.g., AAMkADIyAAAhrbPWAAA=)
• Timestamps use ISO 8601 format in UTC by default
• The dateTimeTimeZone type requires both dateTime and timeZone fields
• wellknownListName can be defaultList, flaggedEmails, or none
• Task status values: notStarted, inProgress, completed, waitingOnOthers, deferred
• Task importance values: low, normal, high
• Supports OData query parameters: $select, $filter, $orderby, $top, $skip
• IMPORTANT: When using curl commands, use curl -g when URLs contain brackets to disable glob parsing
• IMPORTANT: When piping curl output to jq or other commands, environment variables like $MATON_API_KEY may not expand correctly in some shell environments

Error Handling

Troubleshooting: API Key Issues

1. Check that the MATON_API_KEY environment variable is set:

echo $MATON_API_KEY

1. Verify the API key is valid by listing connections:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Troubleshooting: Invalid App Name

1. Ensure your URL path starts with microsoft-to-do. For example:

• Correct: https://api.maton.ai/microsoft-to-do/v1.0/me/todo/lists
• Incorrect: https://api.maton.ai/v1.0/me/todo/lists

Resources

• Microsoft To Do API Overview
• todoTaskList Resource
• todoTask Resource
• checklistItem Resource
• linkedResource Resource
• Maton Community
• Maton Support