Retrieve a list of product categories from the connected platform. Categories define the taxonomy structure used to organize products in the store. EcartAPI normalizes the response to include category IDs, names, parent references, and hierarchy levels — enabling consistent tree traversal across platforms with different category models.

This endpoint is essential for product listing workflows that require assigning products to the correct category tree, and for building category navigation in multi-platform storefronts.

Note: Category depth, parent-child relationship structure, and available metadata vary by platform.