Modulo product to run script (whmcs - opencart or other)

Needs to be created a module for a product that runs a script Platform may be whmcs, opencart or some other that is appropriate The customer should be able to buy this new product that just runs a script on the server example: Product A = Runs shell A script Product B = Runs shell B script I think that the module opens a popup box and make any necessary procedure in this window example: After paying the product is available to run The customer clicks on the button to run the product Opens the popup window He enters data and advances in settings Finally, click Save and save the module scritp shell and runs it immediately or via cron See diagram attached