Browse API permissions

[trademark_sports_cards]

Hi,
I want to get my clients all auction product to display it on shopify store
but when I tried the Inventory API it does not return the correct data, it always returns test data although he has active listing on his account

And when we tried to access the public API (as above one asks user login) so we generated application access token with and without scope but every time on GetItems API (no matter which browse API I use) It returns the error below

[developer_support@ebay]

Hi @trademark_sports_cards 

getItems call is a Limited Release(Limited Release) available only to select Partners and requires an access token created with the client credentials grant flow, using the scope "https://api.ebay.com/oauth/api_scope/buy.item.bulk" 

 For information on how to obtain access to this API in production, see Production eligibility requirements in the Buying Integration Guide for more information.