GET item improvement: search seller’s catalog for item by GTIN

We have made improvements to GET an Item API. You can now fetch an item in your catalog using various identifiers including GTIN, UPC, EAN, ISBN, or Item_ID, in addition to SKU. This helps in troubleshooting SKU/GTIN mismatches in your catalog. 

For more information about how to use GET an Item API, see Search seller’s catalog for an item.