Custom payment url for Xero

We are using [login to view URL] for our accounting, xero provide an option to add any payment gateway by a custom url as showing in the below article details: [login to view URL] A custom URL is designed for payment services that Xero does not officially integrate with. This URL should contain placeholders that will be replaced with relevant invoice data. These placeholders are [INVOICENUMBER], [CURRENCY], [AMOUNTDUE] & [SHORTCODE]. An example URL might look like: [login to view URL][INVOICENUMBER]&currency=[CURRENCY]&amount=[AMOUNTDUE]&shortCode=[SHORTCODE] on other hand, we have [login to view URL] as a payment gateway, please check below link for the service API documents: [login to view URL] we have the following services active with the payment gateway, we dont know which one is efficient to use to achieve our goal: - Ecom to integrate with a website (Direct API) - Payment page (Hosted Payment Page) - payment by link (Invoicing (Pay-by-Link) via API) as a result, we need a workable custom url comply with Xero requirements. Thank you