We are developing a Google workplace addon that requires the following API scope :

https://www.googleapis.com/auth/gmail.send

I also need access to the .readonly scope, but it’s restricted, and getting an audit from a third party is not something that we are looking to get into.

So, is it possible to get the basic functionality done with the gmail.send API and then, for premium plans ask the user for their IMAP/SMTP details? I also want the app to be listed on Google workspace’s addon store.