Hi Daniele , I did some research and I think you can use api guardarian.com and use it, use credit card to pay and receive crypto for a fee. You can link this system with your system so that customers can pay by credit card when receiving crypto, the invoice will be completed. Let's check to see what is a good option and with this payment gateway the high fees are inevitable but there will still be many people who want to use it despite the high fees.