Relative Adjustment
Add or subtract inventory for an inventory item at a location. Use this endpoint only when you do not know absolute quantities. For example, making order-related inventory changes through a third-party may require relative adjustments. Otherwise, use the [Absolute adjustment](/developer/api-reference/rest/admin/management/inventory/adjustments/put-absolute-adjustment) endpoint for updating inventory.
**Limits**
* For maximum inventory levels, see [Inventory adjustments](/developer/docs/admin/catalog-and-inventory/inventory-adjustments#inventory-adjustments).
* Limit of 2000 items for payload length, see [Optimizing performance](/developer/docs/admin/catalog-and-inventory/inventory-adjustments#optimizing-performance) for more information.