Most marketplaces disclose their APIs so that eCommerce applications and software solutions can access e-store data. Businesses, for their part, must integrate with APIs in order to gain access to the previously mentioned store data. APIs serve as a link between your system and the databases of the marketplace. As a result, marketplace integration is a must for gaining access to the client’s store data.
Sellers can use the Walmart Marketplace APIs to manage their items, orders, prices, promotions, inventory, and reports on Walmart.com. The Walmart Developer Portal has everything you need to interface with Walmart Marketplace APIs directly.
You must supply an XML or Excel file containing details about your request to use the Marketplace API. The Excel file can be uploaded to the Seller Center. You can also extract the XML file from the XSD that can be downloaded from this documentation.