Adding a Stripe Checkout Button
The Stripe Checkout widget allows you to accept credit card payments via Stripe. Here's how to use it:
If you haven't done so already, create a Stripe account.
Back at Carrd, Click Add Element
Click Widget to create a new Widget element.
Set Type to Stripe Checkout.
Under Product, select a Type and enter the unique Price ID to use (for example,
(Optional) Change the Button Label and other Options.
(Optional) Enter a Success URL, which can be any valid URL or blank to use the site's current URL.
Scroll down a bit and enter your Stripe API Keys, which can be found using these instructions.