Note: As of AccessAlly 2.2.6, we recommend that you use AccessAlly’s built-in upsell functionality. Please see the appropriate tutorial here: How to Create a 1-Click Upsell
The above upsell solution allows logged-in users to easily make purchases without having to re-enter their billing information.
The tutorial video on this page illustrates how an Infusionsoft user can create an upsell. This is advanced functionality, so please take the time to watch the tutorial video here:
The HTTP POST for the Charge Now function is: