Merchant Support Integration API APIv4 documentation Important: To receive callback notifications after each payment, please define the URL under E-shop settings in the Portal. The previous APIv4 version (PDF) can be accessed from here. Last Updated: 1 year ago in Integration Did this article answer your question? Related Articles Click to Pay integration guide Integrate periodic Open Banking payments Setting up LinkPay via SimplBooks Setting up LinkPay via SmartAccounts Integrate one-click Open Banking payments (CIT) Google Pay™ integration guide