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.
The Fulfillment Outbound Shipment API section of Amazon MWS is no longer available. For programmatic access to Fulfillment Outbound, use the Selling Partner API for Fulfillment Outbound.