- Navigate to the Google Developers Console.
- From the top Project menu select Create project.
- Give your project a name, agree to the terms, then click Create.
- From the Google Developers Console Dashboard, select Enable API. If you don’t see this, select API Manager from the top-left “hamburger” menu.
- Under Google Apps APIs, select Calendar API. Then click Click Enable.
- Select Credentials under API Manager in the left-hand menu, click Create credentials, then select API key. You can get to the same result using the “Go to Credentials” button, but the screens you’re taken through are a bit different.
- Google will generate your API key
Instructions credit: https://docs.simplecalendar.io/google-api-key/