Some of Google's API do have this, it'll be in their terms of service under "Deprecation Policy". The deprecation policy is a promise that if the service is goi

Some of Google's API do have this, it'll be in their terms of service under "Deprecation Policy". The deprecation policy is a promise that if the service is going to be discontinued you'll have at least X notice. The examples I can think of off hand are all Google App Engine related but I wouldn't be surprised if some of the Drive APIs have the same thing.