post https://marketplace.walmartapis.com/v3/fulfillment/orders-fulfillments/channel-details
Use this end point to set up a new sales channel in MCS. You can define: Sales channel Name (e.g. your website, Amazon, eBay, Shein, Temu, etc.); Ship from and return address: This is the business address that customers see on the shipping label. It’s also where we send back undeliverable shipments.