# InventorySourceDeductionApi module The `InventorySourceDeductionApi` module provides service contracts for managing source deductuions when products are sold. This module is part of the new inventory infrastructure. The [Inventory Management overview](https://developer.adobe.com/commerce/webapi/rest/inventory/index.html) describes the MSI (Multi-Source Inventory) project in more detail. ## Installation details This module is installed as part of Magento Open Source. It cannot be deleted or disabled.