Existing Full API integrations
Guidance for customers using the original application-and-offer integration.
The original Full API Integration collected application data in the merchant's checkout and returned offers before displaying a contract. It differs from the hosted application flow in the current quickstart.
If your integration calls /ecommerce/application/create, /create/app, or selects offers directly, keep your current contract and contact PayTomorrow support before changing endpoints. Do not replace those calls with Create order without reviewing the customer journey and required data.
This reference covers the hosted application, virtual cart, pre-approval, and order-management flows. Full API request/response contracts need confirmation for your account; their omission here is not a declaration that an existing endpoint has been retired.
The authentication, postback reconciliation, and order management guides explain the shared concepts. Confirm which operations are enabled for your account with your integration contact.