The Billing Account Management API (TMF666) provides a standardized mechanism for billing account management, such as creation, update, retrieval, and deletion of billing accounts.
TMF666 v5 currently supports the billingAccount resource. Billing accounts map to the Salesforce BillingAccount object.
Using this API you can perform the following operations on billing accounts.
Retrieve the list of billing accounts from the system
Get billing account details based on conditions or an ID parameter