Category invalid for site

eBay error 107 means the category ID submitted isn't valid for the eBay site you're listing on. Categories vary by region, and IDs that work on eBay US may not exist on eBay UK.

Most often this comes from migrating a feed across eBay sites without re-mapping categories, using a deprecated category ID that eBay retired (eBay refreshes the taxonomy quarterly), or trying to list in a leaf category that no longer accepts new listings.

1. Pull the current eBay category tree for your target site via the GetCategories API.
2. Re-map every product to a valid leaf category.
3. Subscribe to eBay's category changes via the Category Versioning API to catch retirements.
4. If you list across multiple sites, maintain a per-site category map.
5. Resubmit and confirm error 107 clears.

• Hardcoding a category ID that gets retired three months later
• Submitting a parent category ID where eBay only accepts leaves