---
title: CartCompletionFailed - Storefront API
description: A failed completion to checkout a cart.
api_version: 2026-04
source_url:
  html: https://shopify.dev/docs/api/storefront/latest/objects/CartCompletionFailed
  md: https://shopify.dev/docs/api/storefront/latest/objects/CartCompletionFailed.md
---

# Cart​Completion​Failed

object

A failed completion to checkout a cart.

## Fields

* errors

  [\[Completion​Error!\]!](https://shopify.dev/docs/api/storefront/latest/objects/CompletionError)

  non-null

  The errors that caused the checkout to fail.

* id

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

  non-null

  The ID of the cart completion attempt.

***

## Map

### Possible type in

* [Cart​Completion​Attempt​Result](https://shopify.dev/docs/api/storefront/latest/unions/CartCompletionAttemptResult)