---
title: CartLinesAddPayload - Storefront API
description: Return type for `cartLinesAdd` mutation.
api_version: 2025-10
api_name: storefront
type: payload
api_type: graphql
source_url:
  html: https://shopify.dev/docs/api/storefront/latest/payloads/cartlinesaddpayload
  md: https://shopify.dev/docs/api/storefront/latest/payloads/cartlinesaddpayload.md
---

# Cart​Lines​Add​Payload

payload

Return type for `cartLinesAdd` mutation.

## Fields

* cart

  [Cart](https://shopify.dev/docs/api/storefront/latest/objects/Cart)

  The updated cart.

* user​Errors

  [\[Cart​User​Error!\]!](https://shopify.dev/docs/api/storefront/latest/objects/CartUserError)

  non-null

  The list of errors that occurred from executing the mutation.

* warnings

  [\[Cart​Warning!\]!](https://shopify.dev/docs/api/storefront/latest/objects/CartWarning)

  non-null

  A list of warnings that occurred during the mutation.

***

## Mutations with this payload

* [cart​Lines​Add](https://shopify.dev/docs/api/storefront/latest/mutations/cartLinesAdd)

  mutation

  Adds a merchandise line to the cart.

***

## Map

### Mutations with this payload

* [cart​Lines​Add](https://shopify.dev/docs/api/storefront/latest/types/cartLinesAdd)