First things first, you’ll need a Site ID and Password from DHL Express. Here are their instructions:
Each UltraCart user will need their own credentials.
To obtain credentials to access the DHL Express XML PI web service, registration on our XML Portal is required: https://xmlportal.dhl.com/login
Once the registration is complete, the test credentials will provided. Once approved, production credentials will be provided by the next business day. Please request that the user enter "UltraCart" in the field marked "Describe the application and business process where XML Services will be used.”