Charge per installation of g-suite application?

Question

I'm exploring how to develop some g-suite applications (eg. gmail add-on, spreadsheet add-on, etc...). It's not clear to me whether the g-suite platform offers a payment API to let me charge customers $2.99 USD per installation? Then google will automatically settle the sales revenue into our bank account? I can't find any technical literature that confirms or denies the existence of this feature.

Or do I need to take a more traditional approach by directing the customer (eg. in the form of an iframe or something) to a page on my web server, where I integrate my own merchant service provider of choice (eg. paypal, stripe, etc...) to handle credit card payments? Then I need to oauth2 authenticate them on my server, confirm their billing is in good standing, before providing access to paid features?

Answer 1

I think for your case you should go and read carefully the G Suite Marketplace Developer Agreement.

In there you have this line which explicity says that you would need to pay Google a "Listing Fee"

3.2 If you choose to distribute Products through the Market for a fee, you will pay Google a non-refundable listing fee ("Listing Fee") as set forth at https://code.google.com/googleapps/marketplace/fees.html.