Your account will be charged for setting a task and the number of reviews you will get in the items array. The cost can be calculated on the Pricing page.
Setting Apple App Reviews Tasks
This endpoint will provide you with reviews published on the App Store platform for the app specified in the app_id field. The returned results are specific to the indicated language and location parameters.
The app_id parameter can be found on the App Store website as a part of a URL pointing to a specific mobile application. It consists of numbers indicated after id in the URL string. For example, here is the URL of the TikTok app on the App Store:
https://apps.apple.com/us/app/id835599320
The app_id of this app is 835599320
Your account will be charged for every 50 reviews returned, e.g., if you specify "depth": 51, you will be charged as per 100 reviews.