Variation structure mismatches eBay uses a multi-attribute parent-child SKU structure for products with size, color, or other options. Most store platforms don't produce this format natively, so variation listings are the most common failure point. Koongo's Rules Editor maps your variants into eBay's required structure before they publish.
Incomplete item specifics Every eBay category on every country site has its own required item specifics - structured attribute fields. Listings with missing or incorrect values get down-ranked or rejected. Koongo's Rules Editor maps your product attributes to each category's item specifics, with transforms where your data needs reshaping.
Missing product identifiers eBay requires a GTIN (EAN or UPC) for listings in branded categories. Without it, products can't go live in those categories. Koongo helps you map identifier fields correctly so branded listings pass eBay's validation.
Country site differences eBay.com, eBay.co.uk, eBay.de, and other sites each run separate category trees, currencies, and requirements. A listing built for one site won't transfer cleanly to another. Koongo configures each eBay site as its own connection so your data is correct per market.