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I have a Google add-on for which I will like to release a paid version.
There are plenty of add-ons which has a paid version so I know it is possible.
However what is the way to start collecting payments from within Google Docs add-ons? Which external providers can we use? Is it possible to collect payment on the website and somehow verify it in the add-on?
Here's is an excerpt from Totally Unscripted (a vlog on GAS development) on how to monetize GSuite Add-ons using Stripe :
https://www.youtube.com/watch?v=KY2ZmACxNGg
This might also help: Stripe payment using Google Apps Script