Retrieve all required and optional attributes (aspects) for a specific product category on a marketplace platform. Category aspects define the item specifics that products must or can include when listed in a given category — for example, a 'Shoes' category may require 'Size', 'Color', and 'Material' while making 'Style' optional.

This endpoint is essential before creating or updating product listings on marketplace platforms, as submitting listings without required aspects typically results in validation errors or lower search visibility.

Note: Category aspects are defined by the marketplace and vary significantly by category, platform, and region.