Todoist

Access the Todoist API v1 with managed OAuth authentication. Manage tasks, projects, sections, labels, and comments.

Quick Start

# List all tasks
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/todoist/api/v1/tasks')
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/todoist/api/v1/{resource}

Maton proxies requests to api.todoist.com/api/v1 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 Todoist 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=todoist&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': 'todoist'}).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": "todoist",
    "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 Todoist 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/todoist/api/v1/tasks')
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 tasks, projects, sections, labels, and comments within the connected Todoist 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

Projects

List Projects

GET /todoist/api/v1/projects

Response:

{
  "results": [
    {
      "id": "6fwFRqmVCFvWVX5R",
      "name": "Inbox",
      "color": "charcoal",
      "parent_id": null,
      "child_order": 0,
      "is_shared": false,
      "is_favorite": false,
      "inbox_project": true,
      "view_style": "list",
      "description": "",
      "is_archived": false
    }
  ],
  "next_cursor": null
}

Get Project

GET /todoist/api/v1/projects/{id}

Create Project

POST /todoist/api/v1/projects
Content-Type: application/json

{
  "name": "My Project",
  "color": "blue",
  "is_favorite": true,
  "view_style": "board"
}

Parameters:

• name (required) - Project name
• parent_id - Parent project ID for nesting
• color - Project color (e.g., "red", "blue", "green")
• is_favorite - Boolean favorite status
• view_style - "list" or "board" (default: list)

Example:

python <<'EOF'
import urllib.request, os, json
data = json.dumps({'name': 'My New Project', 'color': 'blue'}).encode()
req = urllib.request.Request('https://api.maton.ai/todoist/api/v1/projects', 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

Update Project

POST /todoist/api/v1/projects/{id}
Content-Type: application/json

{
  "name": "Updated Project Name",
  "color": "red"
}

Delete Project

DELETE /todoist/api/v1/projects/{id}

Returns 204 No Content on success.

Get Project Collaborators

GET /todoist/api/v1/projects/{id}/collaborators

Tasks

List Tasks

GET /todoist/api/v1/tasks

Query Parameters:

Parameter	Type	Description
project_id	string	Filter by project
section_id	string	Filter by section
label	string	Filter by label name
filter	string	Todoist filter expression
ids	string	Comma-separated task IDs

Response:

{
  "results": [
    {
      "id": "6fwhG9wMHr4wxgpR",
      "content": "Buy groceries",
      "description": "",
      "project_id": "6fwFRqmVCFvWVX5R",
      "section_id": null,
      "parent_id": null,
      "child_order": 1,
      "priority": 2,
      "checked": false,
      "labels": [],
      "due": {
        "date": "2026-02-07T10:00:00",
        "string": "tomorrow at 10am",
        "lang": "en",
        "is_recurring": false
      },
      "added_at": "2026-02-06T20:41:08.449320Z"
    }
  ],
  "next_cursor": null
}

Get Task

GET /todoist/api/v1/tasks/{id}

Create Task

POST /todoist/api/v1/tasks
Content-Type: application/json

{
  "content": "Buy groceries",
  "project_id": "2366834771",
  "priority": 2,
  "due_string": "tomorrow at 10am",
  "labels": ["shopping", "errands"]
}

Required Fields:

• content - Task content/title

Optional Fields:

• description - Task description
• project_id - Project to add task to (defaults to Inbox)
• section_id - Section within project
• parent_id - Parent task ID for subtasks
• labels - Array of label names
• priority - 1 (normal) to 4 (urgent)
• due_string - Natural language due date ("tomorrow", "next Monday 3pm")
• due_date - ISO format YYYY-MM-DD
• due_datetime - RFC3339 format with timezone
• assignee_id - User ID to assign task
• duration - Task duration (integer)
• duration_unit - "minute" or "day"

Example:

python <<'EOF'
import urllib.request, os, json
data = json.dumps({
    'content': 'Complete project report',
    'priority': 4,
    'due_string': 'tomorrow at 5pm',
    'labels': ['work', 'urgent']
}).encode()
req = urllib.request.Request('https://api.maton.ai/todoist/api/v1/tasks', 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

Update Task

POST /todoist/api/v1/tasks/{id}
Content-Type: application/json

{
  "content": "Updated task content",
  "priority": 3
}

Close Task (Complete)

POST /todoist/api/v1/tasks/{id}/close

Returns 204 No Content. For recurring tasks, this schedules the next occurrence.

Reopen Task

POST /todoist/api/v1/tasks/{id}/reopen

Returns 204 No Content.

Delete Task

DELETE /todoist/api/v1/tasks/{id}

Returns 204 No Content.

Sections

List Sections

GET /todoist/api/v1/sections
GET /todoist/api/v1/sections?project_id={project_id}

Response:

{
  "results": [
    {
      "id": "6g424m6CQm47v7mm",
      "project_id": "6g424jv8X52hP7qF",
      "section_order": 1,
      "name": "To Do",
      "added_at": "2026-02-20T22:25:04.203675Z",
      "is_archived": false,
      "is_collapsed": false
    }
  ],
  "next_cursor": null
}

Get Section

GET /todoist/api/v1/sections/{id}

Create Section

POST /todoist/api/v1/sections
Content-Type: application/json

{
  "name": "In Progress",
  "project_id": "2366834771",
  "order": 2
}

Required Fields:

• name - Section name
• project_id - Parent project ID

Update Section

POST /todoist/api/v1/sections/{id}
Content-Type: application/json

{
  "name": "Updated Section Name"
}

Delete Section

DELETE /todoist/api/v1/sections/{id}

Returns 204 No Content.

Labels

List Labels

GET /todoist/api/v1/labels

Response:

{
  "results": [
    {
      "id": "2182980313",
      "name": "urgent",
      "color": "red",
      "order": 1,
      "is_favorite": false
    }
  ],
  "next_cursor": null
}

Get Label

GET /todoist/api/v1/labels/{id}

Create Label

POST /todoist/api/v1/labels
Content-Type: application/json

{
  "name": "work",
  "color": "blue",
  "is_favorite": true
}

Parameters:

• name (required) - Label name
• color - Label color
• order - Sort order
• is_favorite - Boolean favorite status

Update Label

POST /todoist/api/v1/labels/{id}
Content-Type: application/json

{
  "name": "updated-label",
  "color": "green"
}

Delete Label

DELETE /todoist/api/v1/labels/{id}

Returns 204 No Content.

Comments

List Comments

GET /todoist/api/v1/comments?task_id={task_id}
GET /todoist/api/v1/comments?project_id={project_id}

Note: Either task_id or project_id is required.

Response:

{
  "results": [
    {
      "id": "6g424pWVXPpwW7hR",
      "item_id": "6g424pQr2xfCcFr2",
      "content": "This is a comment",
      "posted_at": "2026-02-20T22:25:20.045703Z",
      "posted_uid": "57402826",
      "file_attachment": null,
      "reactions": null
    }
  ],
  "next_cursor": null
}

Get Comment

GET /todoist/api/v1/comments/{id}

Create Comment

POST /todoist/api/v1/comments
Content-Type: application/json

{
  "task_id": "9993408170",
  "content": "Don't forget to check the budget"
}

Required Fields:

• content - Comment text
• task_id OR project_id - Where to attach the comment

Update Comment

POST /todoist/api/v1/comments/{id}
Content-Type: application/json

{
  "content": "Updated comment text"
}

Delete Comment

DELETE /todoist/api/v1/comments/{id}

Returns 204 No Content.

Priority Values

Priority	Meaning
1	Normal (default)
2	Medium
3	High
4	Urgent

Due Date Formats

Use ONE of these formats per request:

• due_string - Natural language: "tomorrow", "next Monday at 3pm", "every week"
• due_date - Date only: "2026-02-15"
• due_datetime - Full datetime: "2026-02-15T14:00:00Z"

Code Examples

JavaScript

// Create a task
const response = await fetch('https://api.maton.ai/todoist/api/v1/tasks', {
  method: 'POST',
  headers: {
    'Authorization': `Bearer ${process.env.MATON_API_KEY}`,
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    content: 'Review pull request',
    priority: 3,
    due_string: 'today at 5pm'
  })
});
const task = await response.json();

Python

import os
import requests

# Create a task
response = requests.post(
    'https://api.maton.ai/todoist/api/v1/tasks',
    headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'},
    json={
        'content': 'Review pull request',
        'priority': 3,
        'due_string': 'today at 5pm'
    }
)
task = response.json()

Notes

• Task IDs and Project IDs are strings, not integers
• Priority 4 is the highest (urgent), priority 1 is normal
• Use only one due date format per request (due_string, due_date, or due_datetime)
• Closing a recurring task schedules the next occurrence
• The Inbox project cannot be deleted
• 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

Status	Meaning
204	Success (no content) - for close, reopen, delete operations
400	Invalid request or missing Todoist connection
401	Invalid or missing Maton API key
404	Resource not found
429	Rate limited
4xx/5xx	Passthrough error from Todoist API

Troubleshooting: API Key Issues

1. Check that the MATON_API_KEY environment variable is set:

echo $MATON_API_KEY

2. 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 todoist. For example:

• Correct: https://api.maton.ai/todoist/api/v1/tasks
• Incorrect: https://api.maton.ai/api/v1/tasks

Resources

• Todoist API v1 Documentation
• Todoist Filter Syntax
• Todoist OAuth Documentation
• Maton Community
• Maton Support