Keepa Category filter API

Is there a way to filter the Keepa API Categorys and Deals? I tried basically everything, but i cant use fetch, almost spend 2 days on it, but i didnt work

Assuming you have specified the categories you want to include or exclude in your request (JSON body)

{
    "includeCategories": [3010075031, 12950651, 355007011],
    "excludeCategories": [77028031, 186606]
}

Maybe you forgot to include "isFilterEnabled": true in your request.

The example request seems to contradict itself regarding how isFilterEnabled should be used. The docs aren’t very clear.

It also may be that categories attached to response items include “other” categories on items which are not the categories you actually used for filtering.