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Where can I find developer documentation about the Worldwide Payment Gateway (WPG)?

We have a comprehensive guide to the WPG - the XML API Integration guide. This guide covers:

  • How to integrate to the WPG via a Direct or Hosted method
  • How to manage your payments once we've initially received them
  • How to add Authentication, Client Side Encryption and Tokenisation services

For all of our XML API documentation, see our XML API Docs page.