Before using Google APIs, you need to turn them on in a Google Cloud project. You can turn on one or more APIs in a single Google Cloud project. If you don't already have a Google Cloud project, see Create a Cloud project.
To enable an API in your Cloud project:
- In the Google Cloud console, go to Menu > More products > Google Workspace > Product Library.
- Click the API that you want to turn on.
- Click Enable.
- To enable more APIs, repeat these steps.
Learn how authentication and authorization works for Google Workspace APIs.