For pushing real-time updates to a data extension, the following API options are available:

Use the DataExtensionObject SOAP object (A) - This object allows you to perform various operations such as insert, update, and delete on data extensions through SOAP API calls.

Use the DataExtension SOAP object (C) - Similar to DataExtensionObject, this object provides capabilities to manage data extensions and their records via SOAP API.

These APIs allow for real-time interaction with data extensions, making them suitable for updating the product catalog.