---
title: cartNoteUpdate - Storefront API
description: Updates the note on the cart.
api_version: 2025-10
api_name: storefront
type: mutation
api_type: graphql
source_url:
  html: https://shopify.dev/docs/api/storefront/latest/mutations/cartNoteUpdate
  md: https://shopify.dev/docs/api/storefront/latest/mutations/cartNoteUpdate.md
---

# cart​Note​Update

mutation

Updates the note on the cart.

## Arguments

* cart​Id

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

  required

  The ID of the cart.

* note

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

  required

  The note on the cart.

***

## Cart​Note​Update​Payload returns

* 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.

***

## Examples

* ### cartNoteUpdate reference

## Mutation Reference

```graphql
mutation cartNoteUpdate($cartId: ID!, $note: String!) {
  cartNoteUpdate(cartId: $cartId, note: $note) {
    cart {
      # Cart fields
    }
    userErrors {
      field
      message
    }
    warnings {
      # CartWarning fields
    }
  }
}
```

## Input

```json
{
  "cartId": "gid://shopify/<objectName>/10079785100",
  "note": "<your-note>"
}
```

##### Variables

```
{
  "cartId": "gid://shopify/<objectName>/10079785100",
  "note": "<your-note>"
}
```