How To Get A Google Calendar API Key

  1. Navigate to the Google Developers Console.
  2.  From the top Project menu select Create project.
  3. Give your project a name, agree to the terms, then click Create.
  4. From the Google Developers Console Dashboard, select Enable API. If you don’t see this, select API Manager from the top-left “hamburger” menu.
  5. Under Google Apps APIs, select Calendar API. Then click Click Enable.
  6. 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.
  7. Google will generate your API key

Instructions credit: