A: Hello! Invoiless is built for invoicing, so your clients pay each invoice online by card through Stripe, or through PayPal, with no extra fees from us. It isn't a checkout for your website and doesn't deliver digital products, but you can use our API (docs.invoiless.com) to create an invoice when someone orders, then redirect them to the invoice link where they can pay. I'd love to hear more about your setup, so send us a quick email at contact [at] invoiless.com and I'll follow up with you. 🙌