eBay Trading API
Call Reference Version 643

Specifies the ID of the highest-level category to return, along with its subcategories. If no parent category is specified, all categories are returned for the specified site. (Please do not pass a value of 0; zero (0) is an invalid value for CategoryParent.) To determine available category IDs, call GetCategories with no filters and use a DetailLevel value of ReturnAll. If you specify multiple parent categories, the hierarchy for each one is returned.

Specifies the eBay site for which to retrieve the category hierarchy. Use the numeric site code (e.g., 77 for eBay Germany). Only necessary if you want to retrieve category data for a site other than the site to which you are submitting the request.

If you are using the GetCategories call with eBay Motors, this is a required field and must have a value of 100,

Specifies the maximum depth of the category hierarchy to retrieve, where the top-level categories (meta-categories) are at level 1. Retrieves all category nodes with a category level less than or equal to this value. If not specified, retrieves categories at all applicable levels. As with all calls, the actual data returned will vary depending on how you configure other fields in the request (including DetailLevel).

If false or omitted, retrieves only leaf categories. (You can only list in leaf categories.) If true, retrieves both leaf and internal (non-leaf) categories. As with all calls, the actual data returned will vary depending on how you configure other fields in the request.