We are searching for an api call to get ItemIDs of other sellers items. In former times we could get that items by using "GetSellerList". Now "GetSellerList" output does not contain the items of the username that was defined in api call, but it contains only the own items. Will this be fixed or is it a conscious decision that you can't find any items of other sellers? Does anybody know an api call that offers the possibility to get itemids of a user defined? Thanks in advance for your help!
I vaguely recall (not sure) someone saying that that change to GetSellerList was intentional by eBay and permanent. In any case, you should be able to get what you need from the Finding API, using the call findItemsAdvanced. Normally the call requires either a keyword phrase or categoryID, but back in 2010-ish, eBay Dev made a helpful exception to that rule if there's a seller filter specified on the input query. In other words, you should be able to specify the seller filter and nothing else needed in the query. So, try that, and you should be able to retrieve all active items from a sellerID (except items out-of-stock or seller on vacation).