Option #1:
Use the Fulfillment Inventory API which is documented here.
Use the ListInventorySupply operation, which returns an InventorySupplyList
containing InventorySupply elements.
InventorySupply
contains InventorySupplyDetail elements, which in turn contain SupplyType
elements, which can be of type Instock
, Inbound
, or Transfer
.
Option #2:
Use the Reports API which is documented here.
The ReportType enumeration includes FBA Reports, which has an FBA Inventory Reports section containing valid enumeration values for different reports.
Instock and Inbound values are available in the _GET_AFN_INVENTORY_DATA_
or _GET_FBA_MYI_ALL_INVENTORY_DATA_
report types.