If you use a point-of-sale (POS) terminal, an e-commerce platform, or a specialised regional payment gateway, you will need to link the services externally:Navigate to the Xero App Store Payments Category.Search for your specific gateway provider (e.g., Airwallex, Windcave, HitPay, or Payment Logic, stripe).Click Get this app to log into that provider's dashboard and execute the secure OAuth flow to link your transactions back to Xero

If you operate a proprietary custom checkout system or use an unsupported processor, Xero allows you to insert a Custom Payment URL. You can append Xero database placeholders (like [Invoice Number] or [Amount Due]) into your gateway's payment string so the external payment link correctly tracks the transaction parameters.