Create a checkout with the Storefront API

• You've completed the Getting started with the Storefront API guide.

• You're familiar with querying products and collections.

• If instead of completing the Getting started, you've turned your app into a sales channel and requested and been approved for payment processing.

• You've created products and product variants in your store.

• To complete the checkout in this tutorial using the checkoutCompleteWithTokenizedPaymentV3 mutation, you need to have the write_checkouts_payments scope enabled for your app. The scope is enabled by requesting payment processing.

• You've familiarized yourself with the concept of checkouts.

Before you can create a checkout, you need to return product variants so that you can populate the checkout input fields with the required line item data.

The following query returns the first two product variants from your store, and specifies the ID as the payload object:

You can use the checkoutCreate mutation to create a new checkout. The return fields include the Checkout object with the webUrl field.

The following mutation creates the checkout and returns the checkout id, the added line items, and the webUrl field that you'll use later to redirect the user to the web checkout.

Let’s examine the checkoutCreate mutation in more detail.

In the following snippet, checkoutCreate is the name of the mutation, and input is the required argument. The required argument value is an input object type that includes the lineItems field, an array that includes variantId and quantity as required fields.

The rest of the mutation defines the return fields for the payload object. The return fields of the checkout show that id and webUrl fields can be returned, and that a lineItems connection can be specified.

The lineItems connection data must be accessed with edges. The node at the end of the CheckoutLineItemConnection type is a CheckoutLineItem and requires title and quantity:

After creating the checkout using the checkoutCreate mutation, you can update the checkout by applying a discount code, changing the line items, or updating the customer's shipping address.

You can apply discount codes using the checkoutDiscountCodeApplyV2 mutation. The mutation replaces any discounts that you've already created. To remove a discount, use the checkoutDiscountCodeRemove mutation.

To change the line items on a checkout, you can use the checkoutLineItemsReplace mutation. The mutation replaces the checkout's existing lineItems array with a new array that's specified in the mutation.

The following example replaces the existing line item with two new line items. The checkoutId argument identifies the checkout to update, and the lineItems argument specifies the variants and quantities to add to the checkout:

Before you can properly complete a checkout, you need to set the customer shipping address by using the checkoutShippingAddressUpdateV2 mutation.

The following example defines the customer's shipping address using GraphQL variables:

You can query Shopify for the shipping rates that are available for the checkout. Then you can select the applicable rate using the handle of the shippingRates and apply it to the checkout.

To return the availableShippingRates, you can query the Checkout object using node. The following query returns the shippingRates for the checkout:

Because retrieving shipping rates can cause asynchronous recalculation, you might have to poll multiple times to return the list of rates. The following response indicates that you need to poll again:

After you've received the list of rates, you can then set the shippingRateHandle using the checkoutShippingLineUpdate mutation:

You can associate a customer with a checkout so that the customer doesn't have to enter customer information when checking out. You can associate the customer to Shopify's web checkout or to a checkout that will be completed through the API.

If you're using Shopify's web checkout, then you can use the Multipass resource to log in customers and redirect them to a web checkout link. You can enable Multipass in a Shopify store, obtain the token identifying the customer, and log in the customer.

To get the Multipass token for the customer, you need to provide some customer information. During this step, you can provide a redirect URL using the return_to field to specify the URL of the web checkout. When customers are redirected to the checkout URL, they stay logged in to the Shopify store.

If you're not using Shopify's web checkout, then you need to get a customer access token to associate the customer with the checkout. You can get the access token using either the customerAccessTokenCreate or customerAccessTokenCreateWithMultipass mutations.

After you have the customer access token, you can use the checkoutCustomerAssociateV2 mutation.

After you've created a customer with a customer access token, you can use the token to associate the customer to the checkout. The following mutation uses the customer's access token and the checkout ID to associate the customer with the checkout.

After you've finished creating and performing any updates to the checkout, you can complete the checkout. There are several ways to complete a checkout:

• Use the webUrl field to redirect the customer to Shopify's web checkout form.

• Complete the checkout using one of the following methods:

  • Shopify card vault
  • Stripe
  • Spreedly

In order to complete the checkout the totalPrice needs to be paid. The total price can change depending on duties, taxes and discounts.

If you complete a checkout for a logged in customer, then the customer is prompted to log in again.

You can't use the X-Shopify-Customer-Access-Token header to preserve authentication when the customer is associated to the checkout. If the store is on a Shopify Plus plan, then you can use the Multipass resource to preserve authentication and associate the customer with the checkout.

If the customer doesn't have an account, then you can use the customerCreate mutation to create one.

The simplest way to complete a checkout is to redirect the customer to Shopify's web checkout form using the returned webUrl field.

At any point during the checkout flow, you can redirect the user to this form by querying the webUrl field on the Checkout:

You can complete the checkout by sending credit card information to Shopify's PCI-compliant card vault. Then you can use the returned payment vault ID with the checkoutCompleteWithCreditCardv2 mutation.

To get the vault ID to complete a payment, you need to send a POST request to the Shopify card vault. The credit card information is sent in the body of the request, and a valid request returns an ID formatted as follows:

To complete the checkout, send the payment information, including the amount, currencyCode and billingAddress fields. Send the payment vault ID as the vaultID.

If you're located in an area impacted by PSD2, then you need to implement 3D Secure payment processing into your app or sales channel. To implement 3D Secure, the following steps are required:

• After completing a checkout with the checkoutCompleteWithCreditCardV2 mutation, redirect the customer to the URL that's returned by the nextActionUrl field so that they can complete the 3D Secure authentication.
• Poll the checkout until the payment is complete and the ready field returns true.

For a detailed guide, refer to Authenticate a payment with 3D Secure.

You can use Shopify's integration with Stripe to tokenize credit cards on behalf of merchants that have enabled Shopify Payments as their payment gateway solution.

You can complete the checkout by sending credit card information to Stripe. Then you can use the returned token with the checkoutCompleteWithTokenizedPaymentV3 mutation.

Shopify's integration with Stripe has the following requirements:

To get a Stripe token for payment, you need to send the credit card information to the Stripe create a card token endpoint. You can use the returned token to complete the payment.

Replace {secret_key} with the test or live key token used for your Stripe platform account:

To complete the checkout, send the payment information in the payment argument of the checkoutCompleteWithTokenizedPaymentV3 mutation. Send the Stripe token in the paymentData field.

You can use Spreedly to send customer credit card information to Shopify's PCI compliant card vault. The process of exchanging credit card information for a Shopify payment vault ID is a multi-step process.

To obtain the vault ID, the following flow is observed:

1. You get a token from the Spreedly payment_methods endpoint.
2. You send the token and credit card information to the Spreedly deliver endpoint.
3. You use the returned Shopify vault ID sent to you by Spreedly to complete the checkout with the checkoutCompleteWithCreditCardV2 mutation.

Shopify's integration with Spreedly has the following requirements:

1. You add the Shopify receiver to your Spreedly account.
2. You add a credit card in Spreedly.
3. You deliver the payment information to Shopify's card vault using Spreedly's deliver endpoint.

Spreedly lets you distribute vaulted credit card data to non-gateway third parties called receivers. You need to add Shopify as a receiver in your Spreedly account so Spreedly can send credit card information to Shopify's card vault.

To add Shopify as a receiver, send a POST request to the Spreedly receivers endpoint including the receiver object in the body of the request. The receiver object includes "shopify" as the receiver_type.

To get a vault ID, you first need to tokenize a credit card with Spreedly. This should be done using an iFrame payment form or Spreedly Express for less PCI scope.

To get the token, send a POST request to the Spreedly payment_methods endpoint, and include the credit card information in the body of the request.

After you get a payment method token, you can get the Shopify card vault ID from the Spreedly deliver endpoint. Spreedly delivers the payment method to Shopify's receiver endpoint, and in response Shopify returns the vault ID.

To get the vault ID, send a POST request to the Spreedly deliver endpoint. You need to include Shopify's receiver token as a path parameter, and the payment method token in the body of the request. This tells Spreedly to deliver the credit card associated with the payment method token to the Shopify card vault. You also need to include properly formatted JSON syntax in the body object.

After you get the Shopify payment vault ID, you can complete the payment using the checkoutCompleteWithCreditCardV2 mutation. To complete the checkout, send the payment information in the payment argument of the checkoutCompleteWithCreditCardV2 mutation. Send the vault ID as the vaultId.

• Learn how to authenticate payments with 3D Secure to process payments for customers in the European Economic Area.
• Learn how to manage customer accounts with the Storefront API.
• Support multiple languages on a storefront with the Storefront API.
• Retrieve metafields with the Storefront API to access additional information from different types of resources.
• Learn about the different tools that you can use to create unique buying experiences anywhere your customers are, including websites, apps, and video games.