post https://marketplace.walmartapis.com/v3/feeds
This API is used for converting existing Marketplace items to be WFS eligible. Once you create a Marketplace item, each item must be converted to WFS by providing additional details that are not required during the item setup process. This item conversion process can be completed by uploading the Convert Spec Excel file using Seller Center or can be completed using the API documented here.
Directions on how to convert your item to be eligible for Walmart Fulfillment Services can be found here.
Additional details on hazmat item compliance requirements can be found here.
To download the schema, refer to the Overview section of the WFS guide.