Google API Settings (and things to check)

So, getting your Google API is a complicated process, and Goog’s keep changing it on us, making it difficult to keep documentation up to date.

Here is a great overview of the many steps involved:

https://www.wpbeginner.com/plugins/how-to-add-google-calendar-in-wordpress/

Here are some additional user notes that have lead to success:

I had checked “Don’t restrict Key”. Changing to the Calendar seems to have done the trick

Or in other words:

You should restrict the API to “Google Calendar API”.

Additionally, one user notes:

According to Google:
You must set two URLs in the?allowedReferers?list.

For example:

1. URL for the domain, without a subdomain, and with a wildcard for the path. For example:
   example.com/*
2. A second URL that includes a wildcard for the subdomain and a wildcard for the path. For example:
   *.example.com/*