Sometime in the last two weeks, the documentation for the Google Contacts API has gone offline. It used to be at https://developers.google.com/google-apps/contacts/v3/.
The ContactsAPI does not show up in the newer Google APIs Explorer at https://developers.google.com/apis-explorer/#p/.
Google is usually really good at announcing deprecations and end-of-life dates for APIs and products, but I can't find anything in their blogs about this API, so I can't tell if this is just a mistake or an intentional change.
The Contacts API itself is still accessible via the OAuth 2.0 Playground, so it's not actually offline.
We can access the API documentation in Google's cache of the first URL above, but we're nervous about developing against something whose future is unclear!
Does anyone know what happened to this documentation?
We never got an explanation, but the documentation is back up as of today. What a relief!