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Klarna Admin API Guide

Klarna is a fully integrated payment method via NEXT Payments and Stripe, supported both in the storefront checkout and via the Admin API.

Klarna transactions send the customer through a Klarna redirect flow, with the resulting order information provided back to your application. Below are the steps needed to get Klarna set up and working on the Admin API.

API Payment Redirect Flow​

Below is a high-level overview of the user flow when creating orders on the Admin API that utilize the payment method redirect flow.

Payment ProviderStoreExternal CheckoutUserPayment ProviderStoreExternal CheckoutUserUser initiates payment1Create order/redirect to "payment_complete_url"2User completes payment3Store processes payment4Store POSTs order data to "payment_return_url"5Receive data/show order details6

Create Order on Admin API​

When creating a new order using Klarna using the orders_create API method, you must specify the payment_method=klarna as well as provide a payment_return_url. The payment_return_url is your endpoint that will receive a POST request containing the final order data.

Payment Details for Order with Klarna
{
    "payment_method": "klarna",
    "payment_details": {
        "payment_return_url": "<external checkout url>",
        "payment_gateway": "<gateway id>", // optional
        "payment_gateway_group": "<gateway group id>" // optional
    }
}
tip

You can optionally provide a payment_gateway when creating the order to use a Klarna account connected to a specific gateway.

Redirect Customer to Klarna​

The response when creating the order will provide a payment_complete_url. Your application should redirect the customer to this URL for completing the payment on Klarna.

Response with Payment Complete URL
{
    "reference_transaction_id": null,
    "payment_complete_url": "<unique checkout url>"
}

Receiving Order Data​

After the customer has completed their payment, they will be redirected to your application with a POST request containing data in the response key comprising all of the order information as a string. See examples below.

caution

Order data structure follows Admin Order API and is application/x-www-form-urlencoded in a variable called response. If the order data is an empty dictionary , it means payment collection was unsuccessful and the order was not created.

Example Parsing of Order Data
import json

def order_receiver_view(request):
    data = json.loads(request.POST.get("response"))
    ...
    return HttpResponse(status=201)

Upsells​

Klarna supports one-click upsells through the ordersAddLineItemsCreate API, enabling additional items to be added to the order with a payment transaction.

Recurring​

Klarna via NEXT Payments supports recurring transactions and can be used as a payment method for an order with subscription items.

All systems normal