---
title: AttributeInput - Storefront API
description: The input fields for an attribute.
api_version: 2026-01
api_name: storefront
type: input-object
api_type: graphql
source_url:
  html: 'https://shopify.dev/docs/api/storefront/latest/input-objects/AttributeInput'
  md: >-
    https://shopify.dev/docs/api/storefront/latest/input-objects/AttributeInput.md
---

# Attribute​Input

input\_object

The input fields for an attribute.

## Fields

* key

  [String!](https://shopify.dev/docs/api/storefront/latest/scalars/String)

  non-null

  Key or name of the attribute.

* value

  [String!](https://shopify.dev/docs/api/storefront/latest/scalars/String)

  non-null

  Value of the attribute.

***

## Input objects using this input

* [Cart​Input.attributes](https://shopify.dev/docs/api/storefront/latest/input-objects/CartInput#fields-attributes)

  INPUT OBJECT

  The input fields to create a cart.

* [Cart​Line​Input.attributes](https://shopify.dev/docs/api/storefront/latest/input-objects/CartLineInput#fields-attributes)

  INPUT OBJECT

  The input fields for adding a merchandise line to a cart. Each line represents a [`ProductVariant`](https://shopify.dev/docs/api/storefront/current/objects/ProductVariant) the buyer intends to purchase, along with the quantity and optional [`SellingPlan`](https://shopify.dev/docs/api/storefront/current/objects/SellingPlan) for subscriptions.

  Used by the [`cartCreate`](https://shopify.dev/docs/api/storefront/current/mutations/cartCreate) mutation when creating a cart with initial items, and the [`cartLinesAdd`](https://shopify.dev/docs/api/storefront/current/mutations/cartLinesAdd) mutation when adding items to an existing cart.

* [Cart​Line​Update​Input.attributes](https://shopify.dev/docs/api/storefront/latest/input-objects/CartLineUpdateInput#fields-attributes)

  INPUT OBJECT

  The input fields for updating a merchandise line in a cart. Used by the [`cartLinesUpdate`](https://shopify.dev/docs/api/storefront/current/mutations/cartLinesUpdate) mutation.

  Specify the line item's [`id`](https://shopify.dev/docs/api/storefront/current/input-objects/CartLineUpdateInput#fields-id) along with any fields to modify. You can change the quantity, swap the merchandise, update custom attributes, or associate a different selling plan.

***

## Map

### Input objects using this input

* [Cart​Input.attributes](https://shopify.dev/docs/api/storefront/latest/input-objects/CartInput#fields-attributes)
* [Cart​Line​Input.attributes](https://shopify.dev/docs/api/storefront/latest/input-objects/CartLineInput#fields-attributes)
* [Cart​Line​Update​Input.attributes](https://shopify.dev/docs/api/storefront/latest/input-objects/CartLineUpdateInput#fields-attributes)