post
https://marketplace.walmartapis.com/v3/feeds
Upload a feed file to update inventory for many SKUs in one request. Use feedType=inventory for single-node files (spec 1.4). Use feedType=MP_INVENTORY for multi-node files (spec 1.5, JSON only). Upload the file with multipart/form-data and the field name file. Validate your file against the official schemas before uploading.