Techniques for transforming transaction data to subscription data using disparate computing platforms is described, including receiving an input configured to request data associated with a product, generating javascript used to render a web page including the data retrieved using a product identifier, invoking a controller script to request a widget file generated compositely to include an offer identifier, a session identifier, a merchant identifier, and the product identifier, calling a platform associated with the second server to determine whether a subscription is associated with the product identifier, and injecting the data, other data, and further data in a composite interface that is configured to simultaneously present a shopping cart with product content and subscription content.