---
title: inventoryTransferSetItems - GraphQL Admin
description: >-
  This mutation sets the quantity for one or more line items on a Transfer.


  Only the items you include in the `lineItems` field are updated. Items already
  on

  the transfer but not referenced in your update will stay unchanged. Each
  inventory

  item may appear at most once in `lineItems`; duplicate `inventoryItemId`
  entries

  are rejected.


  For each entry in `lineItems`:

  - If the inventory item isn't yet on the transfer, a new line item is added
  with
    the provided quantity.
  - If the inventory item is already on the transfer, the provided quantity
    replaces the line item's [`processableQuantity`](https://shopify.dev/docs/api/admin-graphql/latest/objects/InventoryTransferLineItem#field-InventoryTransferLineItem.fields.processableQuantity).
    Any quantity outside the processable portion (for example, already shipped or
    picked for shipment) is preserved, so the resulting total quantity equals the
    preserved portion plus the provided quantity.

  Passing a quantity of `0` is only allowed for transfers in `DRAFT` status; on

  `READY_TO_SHIP` or `IN_PROGRESS` transfers it returns an `INVALID_QUANTITY`
  error.

  On `DRAFT` transfers, `quantity: 0` leaves a zero-quantity line item on the

  transfer; it does not remove the item. To remove a line item from a transfer,
  use

  [`inventoryTransferRemoveItems`](https://shopify.dev/docs/api/admin-graphql/latest/mutations/inventoryTransferRemoveItems).


  > Caution:

  > As of 2026-01, this mutation supports an optional idempotency key using the
  `@idempotent` directive.

  > As of 2026-04, the idempotency key is required and must be provided using
  the `@idempotent` directive.

  > For more information, see the [idempotency
  documentation](https://shopify.dev/docs/api/usage/idempotent-requests).
api_version: 2025-10
api_name: admin
type: mutation
api_type: graphql
source_url:
  html: >-
    https://shopify.dev/docs/api/admin-graphql/2025-10/mutations/inventoryTransferSetItems
  md: >-
    https://shopify.dev/docs/api/admin-graphql/2025-10/mutations/inventoryTransferSetItems.md
metadata:
  domain: admin
---

# inventory​Transfer​Set​Items

mutation

Requires `write_inventory_transfers` access scope. Also: The user must have permission to manage inventory.

This mutation sets the quantity for one or more line items on a Transfer.

Only the items you include in the `lineItems` field are updated. Items already on the transfer but not referenced in your update will stay unchanged. Each inventory item may appear at most once in `lineItems`; duplicate `inventoryItemId` entries are rejected.

For each entry in `lineItems`:

* If the inventory item isn't yet on the transfer, a new line item is added with the provided quantity.
* If the inventory item is already on the transfer, the provided quantity replaces the line item's [`processableQuantity`](https://shopify.dev/docs/api/admin-graphql/latest/objects/InventoryTransferLineItem#field-InventoryTransferLineItem.fields.processableQuantity). Any quantity outside the processable portion (for example, already shipped or picked for shipment) is preserved, so the resulting total quantity equals the preserved portion plus the provided quantity.

Passing a quantity of `0` is only allowed for transfers in `DRAFT` status; on `READY_TO_SHIP` or `IN_PROGRESS` transfers it returns an `INVALID_QUANTITY` error. On `DRAFT` transfers, `quantity: 0` leaves a zero-quantity line item on the transfer; it does not remove the item. To remove a line item from a transfer, use [`inventoryTransferRemoveItems`](https://shopify.dev/docs/api/admin-graphql/latest/mutations/inventoryTransferRemoveItems).

***

**Caution:** As of 2026-01, this mutation supports an optional idempotency key using the \<code>@idempotent\</code> directive. As of 2026-04, the idempotency key is required and must be provided using the \<code>@idempotent\</code> directive. For more information, see the \<a href="https://shopify.dev/docs/api/usage/idempotent-requests">idempotency documentation\</a>.

***

## Arguments

* input

  [Inventory​Transfer​Set​Items​Input!](https://shopify.dev/docs/api/admin-graphql/2025-10/input-objects/InventoryTransferSetItemsInput)

  required

  The input fields for the InventoryTransferSetItems mutation.

***

## Inventory​Transfer​Set​Items​Payload returns

* inventory​Transfer

  [Inventory​Transfer](https://shopify.dev/docs/api/admin-graphql/2025-10/objects/InventoryTransfer)

  The Transfer with its line items updated.

* updated​Line​Items

  [\[Inventory​Transfer​Line​Item​Update!\]](https://shopify.dev/docs/api/admin-graphql/2025-10/objects/InventoryTransferLineItemUpdate)

  The updated line items.

* user​Errors

  [\[Inventory​Transfer​Set​Items​User​Error!\]!](https://shopify.dev/docs/api/admin-graphql/2025-10/objects/InventoryTransferSetItemsUserError)

  non-null

  The list of errors that occurred from executing the mutation.

***

## Examples

* ### inventoryTransferSetItems reference