Amazon Services
Amazon Marketplace Web Service (Amazon MWS) Documentation

Deprecation Notice:

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.

Amazon MWS Documentation

What you should know about the Fulfillment Inventory API section

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