A server-to-server integration on a payment gateway is a type of integration that enables the payment gateway to communicate directly with a merchant's server, without requiring the customer to leave the merchant's website or application during the payment process.
With server-to-server integration, the merchant's server sends payment details to the payment gateway via a secure connection, such as an API or web service, and the payment gateway processes the transaction in real-time.
1 - Open the admin control panel.
2 - Navigate to Accounts | Merchants
3 - Select or Search for the merchant you want to give permission to use the Hosted Payment Page
4 - Select Merchant
5 - Inside the Merchant profile, navigate to the 'Process' TAB
6 - Under Silent Post (Server-to-Server) header, tick the Allow Credit Card Box.
7 - Depending on the acquirer integration you may need to tick the 'Require Phone' box on the right.
8 - Under the FULL CARD DETAILS AND CUSTOMER GENERATION Heading:
8.1 - Tick the Box 'Allow to send full card details'
8.2 - Suggested to tick the box for 'Enable Signature Verification'
9 - Save