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chwal-128681 asked

Merchandising API getRelatedCategoryItems does not work with itemId in sandbox mode

It seems that `getRelatedCategoryItems` always gives me a "Please specify a valid itemId." error whenever I'm trying to use it in sandbox mode. Here's the full URL I've tried- > https://svcs.sandbox.ebay.com/MerchandisingService?CONSUMER-ID=MYCLIENTID&OPERATION-NAME=getRelatedCategoryItems&SERVICE-NAME=MerchandisingService&SERVICE-VERSION=1.1.0&RESPONSE-DATA-FORMAT=JSON&REST-PAYLOAD&itemId=110521803896 The itemId is `110521803896`, which does exist in sandbox as you can see [here]( https://www.sandbox.ebay.com/itm/Wrapped-Golf-Shoe-/110521803896). If I try to use this in production mode (with a different item ID that exists in production), I get a successful response. Strangely, if I lookup the same item ID but use `getSimilarItems`, it gives me a successful response. > https://svcs.sandbox.ebay.com/MerchandisingService?CONSUMER-ID=MYCLIENTID&OPERATION-NAME=getSimilarItems&SERVICE-NAME=MerchandisingService&SERVICE-VERSION=1.1.0&RESPONSE-DATA-FORMAT=JSON&REST-PAYLOAD&itemId=110521803896 Also, all of these merchandising API calls seem to be return an empty response even when the `ack` is "Success". What's up with that?
sandboxmerchandising apigetsimilaritemsgetrelatedcategoryitems
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helios825 answered
Don't bother with the Sandbox when using the Merchandising API (as well as the Finging API). Use Production instead. It's allowed. (Sandbox has many known and unknown problems.) When ack=Success but there's an empty response, it could just be that there are no items returned that meet the query criteria. Or possibly the API call is busted.
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