What are the URLs for the WPG XML API?

The test URL to send XML messages to is: https://secure-test.worldpay.com/jsp/merchant/xml/paymentService.jsp
The live URL to send XML messages to is: https://secure.worldpay.com/jsp/merchant/xml/paymentService.jsp

Worldpay Document Type Definition (DTD)

The Worldpay DTD for XML messages can be viewed or downloaded on our XML API Docs page.