Question asked: How do I set up 1-click upsells? Stripe is the payment provider.

Resources: 

If a customer buys via Stripe, and then later buys an upsell, do they have to enter card details again? - https://support.membermouse.com/support/solutions/articles/9000052208-if-a-customer-buys-via-stripe-and-then-later-buys-an-upsell-do-they-have-to-enter-card-details-agai 

How To Use 1-Click Upsells To Dynamically Engage With Your Customers - https://membermouse.com/mm-features/how-to-use-1-click-upsells-to-dynamically-engage-with-your-customers/ 

Create an Upsell Process - https://support.membermouse.com/support/solutions/articles/9000020370-create-an-upsell-process 

Create Product Specific Confirmation Page - https://support.membermouse.com/support/solutions/articles/9000020509-create-product-specific-confirmation-page