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: 7 months ago in Integration Did this article answer your question? Related Articles Setting up LinkPay via SimplBooks Setting up LinkPay via SmartAccounts Integrate one-click Open Banking payments (CIT) Google Pay™ integration guide 3DS authentication in the demo environment eShoprent (Swedbank)