Skip to navigation
RESTStorefrontCartsCart Items

Update Cart Line Item

Updates a Cart line item. Updates an existing, single line item quantity and the price of custom items in a cart.

If a modified product or variant needs to be changed or updated, you can remove and re-add the product to the cart with the correct variants using the Delete Cart Line Item and the Add Cart Line Items endpoints. You can also use carts mutations that are part of the GraphQL Storefront API.

Notes

  • Substitute your storefront domain for yourstore.example.com.
  • The Send a Test Request feature is not currently supported for this endpoint.
  • To prevent lost updates due to concurrent requests overriding changes made by others, it is recommended to enable optimistic concurrency control by including the version field in the request payload. If the provided version does not match the version on the server, a conflict error will be returned, which the client can handle accordingly.

Path parameters

cartIdstringRequiredformat: "uuid"

This cartʼs unique ID.

itemIdstringRequiredformat: "number"
The ID of the subject item.

Headers

AcceptstringRequiredDefaults to application/json

The MIME type of the response body.

Query parameters

includelist of enumsOptional

Sub-resources to include in the Cart response, in a comma-separated list.

lineItems.physicalItems.options: The Cart returns an abbreviated result. Use this to return physical items product options. Can also be used in a /POST to have the extended Cart object return.

lineItems.digitalItems.options: The Cart returns an abbreviated result. Use this to return digital items product options. Can also be used in a /POST to have the extended Cart object return.

lineItems.digitalItems.options,lineItems.physicalItems.options: The Cart returns an abbreviated result. Use this to return digital and physical options. Can also be used in a /POST to have the extended Cart object return.

lineItems.physicalItems.stockPosition: Returns backorder and stock availability details for physical items.

lineItems.digitalItems.stockPosition: Returns backorder and stock availability details for digital items. Since digital products cannot be backordered, backorder values are always zero.

Allowed values:

Request

This endpoint expects an object.
Line itemobjectRequired
OR
Gift certificate itemobjectRequired
OR
line & gift certificate itemsobjectRequired

Response

The cart, including the updated item.
idstringOptionalformat: "UUID"
Cart ID, provided after creating a cart with a POST.
customerIdintegerOptional
ID of the customer to which the cart belongs.
emailstringOptional
The cart's email. This is the same email that is used in the billing address
currencyobjectOptional
This will always be the same between cart and checkout.
isTaxIncludedbooleanOptional
Whether this item is taxable.
baseAmountdoubleOptional

Cost of cart’s contents, before applying discounts.

discountAmountfloatOptional

Order based discounted amount only - Coupon discounts and product based discounts are excluded.

cartAmountdoubleOptional

Sum of line-items amounts, minus cart-level discounts and coupons. This amount includes taxes (where applicable).

couponslist of objectsOptional
discountslist of objectsOptional
lineItemsobjectOptional
createdTimestringOptionalformat: "ISO-8601"
Time when the cart was created.
updatedTimestringOptionalformat: "ISO-8601"
Time when the cart was last updated.
localestringOptional
Locale of the cart.
versionintegerOptional
The current version of the cart increments with each successful update. You can use it to enable optimistic concurrency control for subsequent updates.

Errors

409
Conflict Error