PUT /carts/{cartId}/items/{itemId}

Updates an existing, single line item in the Cart.

Notes

Currently, only updating list_price and quantity are supported. By default, overriding a product's list_price makes it ineligible for V3 product-level promotions. In Store Settings under Promotions and Coupons in the control panel, you can change this behavior to allow promotions on overridden prices.

If the product has modifiers, omit the variant_id and instead use the option_selections array to describe both the variant and the modifier selections.

If a variant needs to be changed or updated, the product will need to be removed and re-added to the cart with the correct variants using the Add Cart Line Items endpoint.

custom_items cannot be updated via the API at this time. To update your cart, add a new updated custom item and delete the outdated one. If your cart contains only one line item, perform the add operation before the delete operation.

Deleting all line items from the cart will invalidate the cart.

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.

Servers

https://api.bigcommerce.com/stores/{store_hash}/v3

Path parameters

Name	Type	Required	Description
`cartId`	String	Yes	The identifier of a specific cart.
`itemId`	String	Yes

Request headers

Name Type Required Description

Name	Type	Required	Description
`Accept`	String	Yes	The MIME type of the response body. Default value: "application/json"
`Content-Type`	String	Yes	Default value: "application/json"

Accept

String

Yes

The MIME type of the response body.

Default value: "application/json"

Content-Type

String

Yes

Default value: "application/json"

Query parameters

Name	Type	Required	Description
`include[]`	Array	No	`redirect_urls`: Create a direct link to a cart. This can be used for the /POST request for carts. `line_items.physical_items.options`: The cart returns an abbreviated result. Use this to return physical items product options. To return the extended cart object, use in a /POST request. `line_items.digital_items.options`: The cart returns an abbreviated result. Use this to return digital items product options. To return the extended cart object, use in a /POST request. `promotions.banners`: Returns a list of eligible banners.

Request body fields

Name	Type	Required	Description
`gift_certificates[]`	Array	No
`gift_certificates[].name`	String	Yes	Given name for a gift certificate line item.
`gift_certificates[].amount`	Number	Yes
`gift_certificates[].message`	String	No	Message shown to recipient, as provided by sender.
`gift_certificates[].quantity`	Integer	Yes
`gift_certificates[].sender`	Object	Yes
`gift_certificates[].sender.name`	String	No
`gift_certificates[].sender.email`	String	No
`gift_certificates[].theme`	String	Yes	The theme of the gift certificate. Valid values: `"Birthday"` `"Celebration"` `"General"` `"Boy"` `"Girl"` `"Christmas"`
`gift_certificates[].recipient`	Object	Yes
`gift_certificates[].recipient.name`	String	No
`gift_certificates[].recipient.email`	String	No
`version`	Integer	No	The cart version that you expect to apply the updates. If the provided version doesn't match the current cart version, you will receive a conflict error. This field is optional; if not provided, optimistic concurrency control will not apply.
`custom_items[]`	Array	No
`custom_items[].sku`	String	No
`custom_items[].name`	String	No
`custom_items[].quantity`	Number	No
`custom_items[].image_url`	String	No	Image of the product or variant.
`custom_items[].list_price`	Number	No
`line_item`		No

How to start integrating

Add HTTP Task to your workflow definition.
Search for the API you want to integrate with and click on the name.
- This loads the API reference documentation and prepares the Http request settings.
Click Test request to test run your request to the API and see the API's response.