Amazon Marketplace Web Service (MWS) will no longer be available after March 31, 2024. All MWS developers must migrate to Selling Partner API (SP-API) to avoid service disruptions. Refer to the Migration Hub for more information.
Amazon recommends this workflow to ship inventory to Amazon's fulfillment network. Once in the fulfillment network, a seller's items can be used to fulfill orders on Amazon's retail website or through other sales channels.
Following these steps to ship inventory to Amazon's fulfillment network.