• With FIFO/Average costing enabled, SYNC is unsupported and positive ADD requires unitCost per base unit.
• SKU-location pairs are processed separately. A failed pair does not roll back successful pairs; SKU-level errors can fail all pairs for that SKU. Check failureList for details.

Request example

{
  "externalWarehouseId": "WH-DEMO",
  "adjustType": "ADD",
  "skus": [
    {
      "skuNumber": "SKU-DEMO-1",
      "locations": [
        {
          "locationId": 10001,
          "quantity": 5,
          "unitCost": 1000
        }
      ]
    }
  ]
}