Important: If you use Express Checkout with API version 54.0 or later, do not use the SetCustomerBillingAgreement
and GetBillingAgreementCustomerDetails
API operations for billing agreements. Instead, to set up a billing agreement, use the SetExpressCheckout
(NVP | SOAP) API operation and set the amount value to zero. Call the GetExpressCheckoutDetails
(NVP | SOAP) API operation to obtain information about the buyer and the buyer's checkout status. Then use the CreateBillingAgreement
(NVP | SOAP) API operation to create the billing agreement. See the Express Checkout integration guide for more information on setting up a billing agreement.