FindingService API is not giving product result against productId.@type(ean, upc, or isbn)

[abdurjn-0]

I am using this URL to hit API  to fetch a response, I am receiving this 

<findItemsByProductResponse xmlns="http://www.ebay.com/marketplace/search/v1/services">
<ack>Success</ack>
<version>1.13.0</version>
<timestamp>2023-07-25T07:43:33.719Z</timestamp>
<searchResult count="0"/>
<paginationOutput>
<pageNumber>0</pageNumber>
<entriesPerPage>1</entriesPerPage>
<totalPages>0</totalPages>
<totalEntries>0</totalEntries>
</paginationOutput>
<itemSearchURL>https://www.ebay.com/sch/?_ddo=1&_ipg=1&_pgn=1&_productid=2320811</itemSearchURL>
</findItemsByProductResponse>

against that EAN even product exists, but result not found why?

[shipscript]

Others are reporting the same issue. It seems the call now returns only MSKU items:

https://community.ebay.com/t5/Traditional-APIs-Search/FindItemsByProduct-no-longer-working/m-p/33893...

[developer_support@ebay]

Hello abdurjn-0,

The issue has been fixed for Finding API (FindItemsByProduct). Please try again and let us know if you face any issue.

[microtech2020]

The issue is certainly not fixed, at least not in all cases.

shipscript posted results here where Reference ID and UPC for the same product were used in a call and they returned no results. The same product IDs were used in browser search results, and products were populated. This exact procedure was documented multiple times. In one of these examples the URL-formatted API call works with using UPC. However, for the most part, UPC does not return any results.

This is a major issue that is still a problem and support is non-existent or slow.

developer_support@ebay  Please keep working on this. Searching by UPC is a major feature that cannot remain broken.