REST API
Integrate ToDiagram with your applications
ToDiagram provides a REST API for creating, reading and updating your documents.
Upcoming change: the /api/document endpoints described here will be retired on January 31, 2027. A new version and a migration guide are coming in a future update. Until then, keep using the endpoints below.
Available Endpoints
Authentication
All API requests require an API key. To create one, open the editor, click the account icon at the top right, choose Settings, open the API & MCP tab and click Create API Key.
Include your API key in the Authorization header:
Authorization: your-api-keyKeep your key out of URLs and version control.
Base URL
https://todiagram.com/api