post
https://marketplace.walmartapis.com/v3/fulfillment/carrier-label/
The purpose of this service is for sellers to print carrier shipping label.
To print carrier shipping label, first specify a Ship Date. Note, carrier allows to select a ship date 10 days in advance
This API is in legacy state and will be removed on February 09 2026. We recommend transitioning to the Generate Label (New) API and Download Label (New) API.