Guides
Why was my Walmart Marketplace feed rejected?
Walmart validates every item feed against its item-spec schema before it will accept it. When a feed is rejected or an item fails to publish, it's almost always one of a handful of predictable problems. These guides explain each one in plain English — what the error means, why Walmart rejects it, and exactly how to fix it before you upload again.
The most common feed errors
The pattern behind all of them
Walmart's rules aren't one fixed list — they change per product type. The required attributes, the allowed values, and the expected formats for a "Shirts" item are different from a "Coffee" item or a "Laptop Computers" item. That's why a feed that worked last month can fail this month, and why copying another item's payload rarely works: the rules follow the product type, and the only authoritative source is the item-spec schema file for that type.
The reliable way to avoid the rejection loop is to validate your payload against that exact schema before you submit — so you see every problem at once, on your own machine, instead of discovering them one failed upload at a time.
Validate your feed before Walmart does
SellerFlow Feed Workbench is a Chrome extension that checks your Walmart JSON feed against your own imported item-spec schema — locally, in your browser. It flags missing required attributes, invalid values, and product-type mismatches with the exact location of each, before you upload. Nothing leaves your device.
Get SellerFlow on Chrome