Filter to retrieve matching categories but not matching items or buying guides. If true, only matching categories are returned (with no item or buying guide details). If false or not present, matching items and matching categories are both returned, along with buying guide details (if any). If TotalOnly and Categories.CategoriesOnly are both specified in the request and their values are inconsistent with each other, TotalOnly overrides Categories.CategoriesOnly. That is, if TotalOnly is true and Categories.CategoriesOnly is false, the results include matching categories but no item data or buying guides. If TotalOnly is false and Categories.CategoriesOnly is true, the results include matching categories, item data, and buying guides.
See the
Field Index to learn which calls use CategoriesOnly.