The API is built as a web service interface using Simple Object Access Protocol (SOAP) and uses Extensible Markup Language (XML) message formats for exchanging messages between the White Label and Saxo Bank.
The communication between the White Label and the CMS API is encrypted using Secure Socket Layer (SSL) An X509 client certificate (pfx) provided by Saxo Bank is used along with the server user's username and password to establish the identity of the White Label.