Klarna Drop-in integration

Add Klarna to an existing Drop-in integration.

Our Android Drop-in renders Klarna in your payment form, and redirects the shopper to Klarna to complete the payment. When making a Klarna payment, you additionally need to:

Collect shopper details, and specify these in your payment request. Klarna uses this information for risk checks.
Provide information about the purchased items by specifying lineItems in your payment request.
Capture the payment after the goods have been sent. This triggers the payment instructions to be sent to the shopper.

Before you begin

This page explains how to add Klarna to your existing Android Drop-in integration. The Android Drop-in integration works the same way for all payment methods. If you haven't done this integration yet, refer to our Drop-in integration guide.

Before starting your Klarna integration:

Make sure you have set up your back end implementation.
Add Klarna in your test Customer Area.

Show Klarna in your payment form

Drop-in uses the countryCode and the amount.currency from your /paymentMethods request to show the available payment methods to your shopper.

To have Drop-in render Klarna in your payment form, specify in your request one of the following combinations of countryCode and amount.currency, depending on which Klarna payment method you want to accept:

Country	`countryCode`	`amount.currency`
Australia	AU	AUD
Austria	AT	EUR
Belgium	BE	EUR
Denmark	DK	DKK
Finland	FI	EUR
France	FR	EUR
Germany	DE	EUR
Italy	IT	EUR
Norway	NO	NOK
Spain	ES	EUR
Sweden	SE	SEK
Switzerland	CH	CHF
The Netherlands	NL	EUR
United Kingdom	GB	GBP
United States	US	USD

Make a payment

Klarna requires shopper details such as name and address to approve a payment. To improve shopper experience and conversion rates, provide these details in the payment request and make sure that the parameters in the request match.
Send the shopper name and billing address in the request.

We recommend that you send the shopper name and billing address to improve the shopper experience. If not provided in the request, Klarna will ask the shopper to provide these parameters in the checkout page.

Make sure that the country, the currency, and the shopper locale in the request are compatible.

Klarna will only approve the payment if the country it is made from matches the currency and the country specified in the billing and delivery address.
The billing address must be in the same country as the delivery address.
The Klarna checkout page can only be rendered in another language if the specified locale matches the country and currency used in the request. By default, the checkout page is rendered is English (en-US).

The following table shows the possible combinations that you can send in a payment request:

Country	`countryCode` `billingAddress.country` `deliveryAddress.country`	`amount.currency`	`shopperLocale` default	`shopperLocale` alternative
Austria	AT	EUR	`en_US`	`de_AT`
Belgium	BE	EUR	`en_US`	`nl_BE`, `fr_BE`
Denmark	DK	DKK	`en_US`	`da_DK`
Finland	FI	EUR	`en_US`	`fi_FI`, `sv_FI`
France	FR	EUR	`en_US`	`fr_FR`, `en_FR`
Germany	DE	EUR	`en_US`	`de_DE`
Italy	IT	EUR	`en_US`	`it_IT`
Norway	NO	NOK	`en_US`	`nb_NO`
Spain	ES	EUR	`en_US`	`es_ES`
Sweden	SE	SEK	`en_US`	`sv_SE`
Switzerland	CH	CHF	`en_US`	`de_CH`, `fr_CH`, `it_CH`
The Netherlands	NL	EUR	`en_US`	`nl_NL`
United Kingdom	GB	GBP	`en_US`	`en_GB`
United States	US	USD	`en_US`	-

Make a payment request

When the shopper proceeds to pay, Drop-in returns the paymentComponentData.paymentMethod.

Pass the paymentComponentData.paymentMethod to your server.
From your server, make a /payments request, specifying:
- paymentMethod: The paymentComponentData.paymentMethod from your client app.
- shopperLocale: A combination of language code and country code to define which language should be used in the Klarna checkout page. Default is en_US.
- countryCode: The shopper's country.
- telephoneNumberOptional: The shopper's telephone number, if provided.
- shopperEmail: The shopper's email address. This is where Klarna will send the payment instructions.
- shopperReference: A unique reference to identify the shopper (minimum length three characters).
- returnUrl: The URL that the shopper is redirected to after they complete the payment.
- lineItems: Price and product information about the purchased items. Klarna will only approve the payment if the total amount specified in lineItems matches the amount.value. You can optionally specify productUrl and imageUrl to include a link to and a picture of the purchased items in the invoice.
- shopperName: The shopper's full name and gender, if specified.
- billingAddress Optional: The postal address of the shopper.
- deliveryAddress Optional: The postal address where the purchased goods should be delivered. If not provided, the billing address will be used.
- additionalData.openinvoicedata.merchantData Optional: For some products or business models, Klarna might require additional information. If you need to send in this information, specify here the Base64 encoded JSON of the attachment.body value described in Klarna's documentation.

https://docs.adyen.com/payment-methods/klarna/android-drop-in#payments

curl https://checkout-test.adyen.com/v67/payments \
-H "x-API-key: YOUR_X-API-KEY" \
-H "content-type: application/json" \
-d '{
   "merchantAccount":"YOUR_MERCHANT_ACCOUNT",
   "reference":"YOUR_ORDER_REFERENCE",
   "paymentMethod":{
      "type":"klarna"
   },
   "amount":{
      "currency":"SEK",
      "value": 1000
   },
   "shopperLocale":"en_US",
   "countryCode":"SE",
   "telephoneNumber": "+46 840 839 298",
   "shopperEmail":"youremail@email.com",
   "shopperName":{
      "firstName":"Testperson-se",
      "gender":"UNKNOWN",
      "lastName":"Approved"
   },
   "shopperReference":"YOUR_UNIQUE_SHOPPER_ID",
   "billingAddress":{
      "city":"Ankeborg",
      "country":"SE",
      "houseNumberOrName":"1",
      "postalCode":"12345",
      "street":"Stargatan"
   },
   "deliveryAddress":{
      "city":"Ankeborg",
      "country":"SE",
      "houseNumberOrName":"1",
      "postalCode":"12345",
      "street":"Stargatan"
   },
   "returnUrl":"adyencheckout://your.package.name",
   "lineItems":[
      {
         "quantity":"1",
         "amountExcludingTax":"331",
         "taxPercentage":"2100",
         "description":"Shoes",
         "id":"Item #1",
         "taxAmount":"69",
         "amountIncludingTax":"400",
         "productUrl": "URL_TO_PURCHASED_ITEM",
         "imageUrl": "URL_TO_PICTURE_OF_PURCHASED_ITEM"
      },
      {
         "quantity":"2",
         "amountExcludingTax":"248",
         "taxPercentage":"2100",
         "description":"Socks",
         "id":"Item #2",
         "taxAmount":"52",
         "amountIncludingTax":"300",
         "productUrl": "URL_TO_PURCHASED_ITEM",
         "imageUrl": "URL_TO_PICTURE_OF_PURCHASED_ITEM"
      }
   ],
   "additionalData" : {
     "openinvoicedata.merchantData" : "eyJjdXN0b21lcl9hY ... "
   }
}'

# Set your X-API-KEY with the API key from the Customer Area.
adyen = Adyen::Client.new
adyen.env = :test
adyen.api_key = "YOUR_X-API-KEY"

response = adyen.checkout.payments({
  :merchantAccount => "YOUR_MERCHANT_ACCOUNT",
  :reference => "YOUR_ORDER_NUMBER",
  :paymentMethod => {
    :type => "klarna"
  },
  :amount => {
    :currency => "SEK",
    :value => 1000
  },
  :shopperLocale => "en_US",
  :countryCode => "SE",
  :shopperEmail => "youremail@email.com",
  :shopperName => {
    :firstName => "Testperson-se",
    :gender => "UNKNOWN",
    :lastName => "Approved"
  },
  :telephoneNumber => "+46 840 839 298",
  :shopperReference => "YOUR_UNIQUE_SHOPPER_ID",
  :billingAddress => {
    :city => "Ankeborg",
    :country => "SE",
    :houseNumberOrName => "1",
    :postalCode => "12345",
    :street => "Stargatan"
  },
  :deliveryAddress => {
    :city => "Ankeborg",
    :country => "SE",
    :houseNumberOrName => "1",
    :postalCode => "12345",
    :street => "Stargatan"
  },
  :returnUrl => "adyencheckout://your.package.name",
  :lineItems => [
    {
      :quantity => "1",
      :amountExcludingTax => "331",
      :taxPercentage => "2100",
      :description => "Shoes",
      :id => "Item #1",
      :taxAmount => "69",
      :amountIncludingTax => "400",
      :productUrl => "URL_TO_PURCHASED_ITEM",
      :imageUrl => "URL_TO_PICTURE_OF_PURCHASED_ITEM"
    },
    {
      :quantity => "2",
      :amountExcludingTax => "248",
      :taxPercentage => "2100",
      :description => "Socks",
      :id => "Item #2",
      :taxAmount => "52",
      :amountIncludingTax => "300",
      :productUrl => "URL_TO_PURCHASED_ITEM",
      :imageUrl => "URL_TO_PICTURE_OF_PURCHASED_ITEM"
    }
  ],
  :additionalData => {
    :openinvoicedata.merchantData => "eyJjdXN0b21lcl9hY ... "
  }
})

// Create a Client to establish a connection to our services with your API Key from the Customer Area.
Client client = new Client("YOUR_API_KEY", Environment.TEST);

Checkout checkout = new Checkout(client);

PaymentsRequest paymentsRequest = new PaymentsRequest();

paymentsRequest.setMerchantAccount("YOUR_MERCHANT_ACCOUNT");
paymentsRequest.setReference("YOUR_ORDER_REFERENCE");

PaymentMethodDetails paymentMethodDetails = new DefaultPaymentMethodDetails();
paymentMethodDetails.setType("klarna");

paymentsRequest.setPaymentMethod(paymentMethodDetails);

Amount amount = new Amount();
amount.setCurrency("SEK");
amount.setValue(1000L);

paymentsRequest.setAmount(amount);
paymentsRequest.setShopperLocale("en_US");
paymentsRequest.setCountryCode("SE");
paymentsRequest.setTelephoneNumber("+46 840 839 298");
paymentsRequest.setShopperEmail("youremail@email.com");

Name shopperDetails = new Name();
shopperDetails.setFirstName("TestPerson-Se");
shopperDetails.setGender(Name.GenderEnum.UNKNOWN);
shopperDetails.setLastName("Approved");

paymentsRequest.setShopperName(shopperDetails);
paymentsRequest.setShopperReference("YOUR_UNIQUE_SHOPPER_ID");

Address billingAddress = new Address();
billingAddress.setCity("Ankeborg");
billingAddress.setCountry("SE");
billingAddress.setHouseNumberOrName("1");
billingAddress.setPostalCode("12345");
billingAddress.setStreet("Stargatan");

paymentsRequest.setBillingAddress(billingAddress);

Address deliveryAddress = new Address();
deliveryAddress.setCity("Ankeborg");
deliveryAddress.setCountry("SE");
deliveryAddress.setHouseNumberOrName("1");
deliveryAddress.setPostalCode("12345");
deliveryAddress.setStreet("Stargatan");

paymentsRequest.setdeliveryAddress(deliveryAddress);
paymentsRequest.setReturnUrl("adyencheckout://your.package.name");

List<LineItem> lineItems = new ArrayList<>();
lineItems.add(
        new LineItem()
                .quantity(1L)
                .amountExcludingTax(331L)
                .taxPercentage(2100L)
                .description("Shoes")
                .id("Item #1")
                .taxAmount(69L)
                .amountIncludingTax(400L)
                .productUrl("URL_TO_PURCHASED_ITEM")
                .imageUrl("URL_TO_PICTURE_OF_PURCHASED_ITEM")
);
lineItems.add(
        new LineItem()
                .quantity(2L)
                .amountExcludingTax(248L)
                .taxPercentage(2100L)
                .description("Socks")
                .id("Item #2")
                .taxAmount(52L)
                .amountIncludingTax(300L)
                .productUrl("URL_TO_PURCHASED_ITEM")
                .imageUrl("URL_TO_PICTURE_OF_PURCHASED_ITEM")
);

paymentsRequest.setLineItems(lineItems);

Map<String, String> additionalData = new HashMap<>();
additionalData.put("openinvoicedata.merchantData", "eyJjdXN0b21lcl9hY ...");

paymentsRequest.setAdditionalData(additionalData);

PaymentsResponse paymentsResponse = checkout.payments(paymentsRequest);

// Set your X-API-KEY with the API key from the Customer Area.
$client = new \Adyen\Client();
$client->setXApiKey("YOUR_X-API-KEY");
$service = new \Adyen\Service\Checkout($client);

$params = [
  "merchantAccount" => "YOUR_MERCHANT_ACCOUNT",
  "reference" => "YOUR_ORDER_REFERENCE",
  "paymentMethod" => [
     "type" => "klarna"
  ],
  "amount" => [
     "currency" => "SEK",
     "value" => "1000"
  ],
  "shopperLocale" => "en_US",
  "countryCode" => "SE",
  "telephoneNumber" => "+46 840 839 298",
  "shopperEmail" => "youremail@email.com",
  "shopperName" => [
     "firstName" => "Testperson-se",
     "gender" => "UNKNOWN",
     "lastName" => "Approved"
  ],
  "shopperReference" => "YOUR_UNIQUE_SHOPPER_ID",
  "billingAddress" => [
     "city" => "Ankeborg",
     "country" => "SE",
     "houseNumberOrName" => "1",
     "postalCode" => "12345",
     "street" => "Stargatan"
  ],
  "deliveryAddress" => [
     "city" => "Ankeborg",
     "country" => "SE",
     "houseNumberOrName" => "1",
     "postalCode" => "12345",
     "street" => "Stargatan"
  ],
  "returnUrl" => "adyencheckout://your.package.name",
  "lineItems" => [
     [
        "quantity" => "1",
        "amountExcludingTax" => "331",
        "taxPercentage" => "2100",
        "description" => "Shoes",
        "id" => "Item #1",
        "taxAmount" => "69",
        "amountIncludingTax" => "400",
        "productUrl" => "URL_TO_PURCHASED_ITEM",
        "imageUrl" => "URL_TO_PICTURE_OF_PURCHASED_ITEM"
     ],
     [
        "quantity" => "2",
        "amountExcludingTax" => "248",
        "taxPercentage" => "2100",
        "description" => "Socks",
        "id" => "Item #2",
        "taxAmount" => "52",
        "amountIncludingTax" => "300",
        "productUrl" => "URL_TO_PURCHASED_ITEM",
        "imageUrl" => "URL_TO_PICTURE_OF_PURCHASED_ITEM"
     ]
  ],
  "additionalData" => [
    "openinvoicedata.merchantData" => "eyJjdXN0b21lcl9hY ... "
  ]
];

$result = $service->payments($params);

// Check if further action is needed
if (array_key_exists("action", $result)){
   // Pass the action object to your frontend.
   // $result["action"]
}
else {
   // No further action needed, pass the resultCode to your front end
   // $result['resultCode']
}

# Set your X-API-KEY with the API key from the Customer Area.
adyen = Adyen.Adyen()
adyen.client.xapikey = 'YOUR_X-API-KEY'

result = adyen.checkout.payments({
  "merchantAccount": "YOUR_MERCHANT_ACCOUNT",
  "reference": "YOUR_ORDER_REFERENCE",
  "paymentMethod": {
    "type": "klarna"
  },
  "amount": {
    "currency": "SEK",
    "value": 1000
  },
  "shopperLocale": "en_US",
  "countryCode": "SE",
  "telephoneNumber": "+46 840 839 298",
  "shopperEmail": "youremail@email.com",
  "shopperName": {
    "firstName": "Testperson-se",
    "gender": "UNKNOWN",
    "lastName": "Approved"
  },
  "shopperReference": "YOUR_UNIQUE_SHOPPER_ID",
  "billingAddress": {
    "city": "Ankeborg",
    "country": "SE",
    "houseNumberOrName": "1",
    "postalCode": "12345",
    "street": "Stargatan"
  },
  "deliveryAddress": {
    "city": "Ankeborg",
    "country": "SE",
    "houseNumberOrName": "1",
    "postalCode": "12345",
    "street": "Stargatan"
  },
  "returnUrl": "adyencheckout://your.package.name",
  "lineItems": [
    {
      "quantity": "1",
      "amountExcludingTax": "331",
      "taxPercentage": "2100",
      "description": "Shoes",
      "id": "Item #1",
      "taxAmount": "69",
      "amountIncludingTax": "400",
      "productUrl": "URL_TO_PURCHASED_ITEM",
      "imageUrl": "URL_TO_PICTURE_OF_PURCHASED_ITEM"
    },
    {
      "quantity": "2",
      "amountExcludingTax": "248",
      "taxPercentage": "2100",
      "description": "Socks",
      "id": "Item #2",
      "taxAmount": "52",
      "amountIncludingTax": "300",
      "productUrl": "URL_TO_PURCHASED_ITEM",
      "imageUrl": "URL_TO_PICTURE_OF_PURCHASED_ITEM"
    }
  ],
  "additionalData": {
    "openinvoicedata.merchantData": "eyJjdXN0b21lcl9hY ... "
  }
})

// Set your X-API-KEY with the API key from the Customer Area.
var client = new Client ("YOUR_X-API-KEY", Environment.Test);
var checkout = new Checkout(client);

var paymentRequest = new Adyen.Model.Checkout.PaymentRequest
{
   MerchantAccount = "YOUR_MERCHANT_ACCOUNT",
   Reference = "YOUR_ORDER_REFERENCE",
   PaymentMethod = new DefaultPaymentMethodDetails { Type = "klarna" },
   Amount = new Model.Checkout.Amount(Currency: "SEK", Value: 1000),
   ShopperLocale = "en_US",
   CountryCode = "SE",
   TelephoneNumber = "+46 840 839 298",
   ShopperEmail = "youremail@email.com",
   ShopperName = new Model.Checkout.Name
   {
       FirstName = "Testperson-se",
       Gender = Model.Checkout.Name.GenderEnum.UNKNOWN,
       LastName = "Approved"
   },
   ShopperReference = "YOUR_UNIQUE_SHOPPER_ID",
   BillingAddress = new Model.Checkout.Address
   {
       City = "Ankeborg",
       Country = "SE",
       HouseNumberOrName = "1",
       PostalCode = "12345",
       Street = "Stargatan"
   },
   DeliveryAddress = new Model.Checkout.Address
   {
       City = "Ankeborg",
       Country = "SE",
       HouseNumberOrName = "1",
       PostalCode = "12345",
       Street = "Stargatan"
   },
   ReturnUrl = "adyencheckout://your.package.name",
   LineItems = new List<LineItem>
{
   new LineItem(Quantity:1, AmountExcludingTax:331, TaxPercentage:2100,
   Description:"Shoes", Id:"Item #1", TaxAmount:69, AmountIncludingTax:400, ProductUrl:"URL_TO_PURCHASED_ITEM", ImageUrl:"URL_TO_PICTURE_OF_PURCHASED_ITEM"),
   new LineItem(Quantity:2, AmountExcludingTax:248, TaxPercentage:2100,
   Description:"Socks", Id:"Item #2", TaxAmount:52, AmountIncludingTax:300, ProductUrl:"URL_TO_PURCHASED_ITEM", ImageUrl:"URL_TO_PICTURE_OF_PURCHASED_ITEM"),
},
   AdditionalData = new Dictionary<string, string> { { "openinvoicedata.merchantData", "eyJjdXN0b21lcl9hY ... " } }
};
return paymentRequest;
}

// Set your X-API-KEY with the API key from the Customer Area.
const {Client, Config, CheckoutAPI} = require('@adyen/api-library');
const config = new Config();
// Set your X-API-KEY with the API key from the Customer Area.
config.apiKey = '[API_KEY]';
config.merchantAccount = '[MERCHANT_ACCOUNT]';
const client = new Client({ config });
client.setEnvironment("TEST");
const checkout = new CheckoutAPI(client);
checkout.payments({
  merchantAccount: "YOUR_MERCHANT_ACCOUNT",
  reference: "YOUR_ORDER_REFERENCE",
  paymentMethod: {
     type: "klarna"
  },
  amount: {
     currency: "SEK",
     value: "1000"
  },
  shopperLocale: "en_US",
  countryCode: "SE",
  telephoneNumber: "+46 840 839 298",
  shopperEmail: "youremail@email.com",
  shopperName: {
     firstName: "Testperson-se",
     gender: "UNKNOWN",
     lastName: "Approved"
  },
  shopperReference: "YOUR_UNIQUE_SHOPPER_ID",
  billingAddress: {
     city: "Ankeborg",
     country: "SE",
     houseNumberOrName: "1",
     postalCode: "12345",
     street: "Stargatan"
  },
  deliveryAddress: {
     city: "Ankeborg",
     country: "SE",
     houseNumberOrName: "1",
     postalCode: "12345",
     street: "Stargatan"
  },
  returnUrl: "adyencheckout://your.package.name",
  lineItems: [
     {
        quantity: "1",
        amountExcludingTax: "331",
        taxPercentage: "2100",
        description: "Shoes",
        id: "Item 1",
        taxAmount: "69",
        amountIncludingTax: "400",
        productUrl: "URL_TO_PURCHASED_ITEM",
        imageUrl: "URL_TO_PICTURE_OF_PURCHASED_ITEM"
     },
     {
        quantity: "2",
        amountExcludingTax: "248",
        taxPercentage: "2100",
        description: "Socks",
        id: "Item 2",
        taxAmount: "52",
        amountIncludingTax: "300",
        productUrl: "URL_TO_PURCHASED_ITEM",
        imageUrl: "URL_TO_PICTURE_OF_PURCHASED_ITEM"
     }
  ],
  additionalData: {
    "openinvoicedata.merchantData": "eyJjdXN0b21lcl9hY ... "
  }
}).then(res => res);

The /payments response contains an action object with the information needed to redirect the shopper.

https://docs.adyen.com/payment-methods/afterpaytouch/ios-drop-in#-payments-response

/payments response

{
   "resultCode":"RedirectShopper",
   "action":{
      "paymentMethodType":"klarna",
      "method":"GET",
      "url":"https://checkoutshopper-test.adyen.com/checkoutshopper/checkoutPaymentRedirect?redirectData=...",
      "type":"redirect"
   }
}

If your integration is set up correctly, the action object is passed from your server to the client.

Check the payment result

Drop-in redirects the shopper to complete the payment. When the shopper returns back to your app, Drop-in provides the actionComponentData object.

From your server, make a POST /payments/details request providing:

details: The actionComponentData.details object from Drop-in.

https://docs.adyen.com/payment-methods/afterpaytouch/android-drop-in#-payments-details-request

/payments/details request

  curl https://checkout-test.adyen.com/v67/payments/details \
  -H "x-API-key: YOUR_X-API-KEY" \
  -H "content-type: application/json" \
  -d '{
       "details": {
         "redirectResult": "eyJ0cmFuc1N0YXR1cyI6IlkifQ=="
     }
  }'

You receive a response containing:

resultCode: Use this to present the payment result to your shopper.
pspReference: Our unique identifier for the transaction.

https://docs.adyen.com/payment-methods/afterpaytouch/android-drop-in#-payments-details-response

/payments/details response

{
     "resultCode": "Authorised",
     "pspReference": "88154795347618C"
}

Present the payment result

Use the resultCode from the /payments/details response to present the payment result to your shopper. The resultCode values you can receive for Klarna are:

resultCode	Description	Action to take
Authorised	The payment was successful.	Inform the shopper that the payment was successful. After the goods have been sent, you also need to capture the payment.
Cancelled	The shopper cancelled the payment.	Ask the shopper whether they want to continue with the order, or ask them to select a different payment method.
Refused	The payment was refused by Klarna, as it didn't pass their risk checks.	Ask the shopper to try the payment again using a different payment method.
Pending or Received	Only when processing in the Unites States: Klarna has not confirmed the final status of the payment yet, for example because of suspected fraud. If the payment is not authorised within 24 hours, it is automatically cancelled. See note ¹	Inform the shopper that you've received their order, and are waiting for the payment to be completed. To know the final result of the payment, wait for the AUTHORISATION notification.

When a payment is refused by Klarna, the shopper sees the following message:

¹ If you'd like pending Klarna payments to be cancelled immediately, contact our Support Team. If you have set pending Klarna payments to be cancelled immediately, you will receive for such payments a notification with:

eventCode: AUTHORISATION
success: false

Capture the payment

All Klarna payments have to be manually captured within 90 days after authorisation, even if you have enabled automatic capture on your merchant account.

If you can guarantee that the goods are shipped within 24 hours of capturing the payment, our Support Team can also set up automatic capture for Klarna payments.

Manual captures

To manually capture a Klarna payment, specify in your call to the /capture endpoint:

merchantAccount: The name of your merchant account that is used to process the payment.
modificationAmount: The amount that the shopper should pay. This must be the same as the authorised amount.
originalReference: The original pspReference of the payment that you want to capture. This reference is returned in the response to your payment request, and in the AUTHORISATION notification.

additionalData.openinvoicedata: Information to include on the invoice:

Price and product information for the items that the shopper should pay for.
Optional: Shipping and tracking information.

Price and product information

Although some of the field names are different, the information in additionalData.openinvoicedata is the same as what you provided in lineItems when making a /payments request. The following table shows how the fields correspond.

openinvoicedata	Corresponds with	Description
`itemAmount`	`lineItems.amountExcludingTax`	The price for one item, without the tax, in minor units.
`itemVatPercentage`	`lineItems.taxPercentage`	The tax percentage, in minor units.
`itemVatAmount`	`lineItems.taxAmount`	The tax amount for one item, in minor units.

Shipping and tracking information (optional)

You can optionally use additionalData.openinvoicedata to include shipping and tracking information. This adds information about how the products are shipped to the deliveryAddress that you specified in the /payments request. The shipping and tracking information maps to Klarna's shipping info object. If you have the shipping and tracking information at the time of the capture, we recommend that you send it as it will improve the overall shopper experience. Klarna includes this information in their app, where the info is updated based on the tracking details.

If all items are shipped with the same provider, specify the shipping and tracking information once, as shown in the capture example below.
If one or more items in the order are shipped with different a different provider or tracking details, specify the shipping and tracking information as an array.
You cannot specify different delivery addresses for a single order with multiple items.

openinvoicedata	Corresponds with Klarna's `shipping_info` object	Description
`shippingCompany`	shipping_company	The name of the shipping company, as specific as possible. Maximum 100 characters. If there are multiple shipping companies, specify an array. For example: DHL SE or [DHL SE, PostNord]
`shippingMethod`	shipping_method	Shipping method. Possible values: PickUpStore Home BoxReg BoxUnreg PickUpPoint Own Postal DHLPackstation Digital Undefined
`trackingNumber`	tracking_number	Tracking number for the shipment. Maximum 100 characters. If there are multiple tracking numbers, specify an array. For example: 050823 or [050823, 050824]
`trackingUri`	tracking_uri	URI where the customer can track their shipment. Maximum 1024 characters.
`returnShippingCompany`	return_shipping_company	The name of the shipping company for the return shipment, as specific as possible. Maximum 100 characters. For example: DHL SE
`returnTrackingNumber`	return_tracking_number	Tracking number for the return shipment. Maximum 100 characters.
`returnTrackingUri`	return_tracking_uri	URI where the customer can track their return shipment. Maximum 1024 characters.

https://docs.adyen.com/payment-methods/klarna/api-only#-capture-request

/capture request

{
   "merchantAccount":"YOUR_MERCHANT_ACCOUNT",
   "modificationAmount":{
      "currency":"SEK",
      "value":"1000"
   },
   "originalReference":"COPY_PSP_REFERENCE_FROM_AUTHORISE_RESPONSE",
   "additionalData":{
      "openinvoicedata.numberOfLines":"2",
      "openinvoicedata.line1.currencyCode":"SEK",
      "openinvoicedata.line1.description":"Shoes",
      "openinvoicedata.line1.itemAmount":"331",
      "openinvoicedata.line1.itemVatAmount":"69",
      "openinvoicedata.line1.itemVatPercentage":"2100",
      "openinvoicedata.line1.numberOfItems":"1",
      "openinvoicedata.line1.productUrl":"URL_TO_PURCHASED_ITEM",
      "openinvoicedata.line1.imageUrl":"URL_TO_PICTURE_OF_PURCHASED_ITEM",
      "openinvoicedata.line1.shippingCompany": "DHL SE",
      "openinvoicedata.line1.shippingMethod": "Home",
      "openinvoicedata.line1.trackingNumber": "TRACKING_NUMBER",
      "openinvoicedata.line1.trackingUri": "TRACKING_URI",
      "openinvoicedata.line1.returnShippingCompany": "DHL SE",
      "openinvoicedata.line1.returnTrackingNumber": "RETURN_TRACKING_NUMBER",
      "openinvoicedata.line1.returnTrackingUri": "RETURN_TRACKING_URI",
      "openinvoicedata.line2.currencyCode":"SEK",
      "openinvoicedata.line2.description":"Socks",
      "openinvoicedata.line2.itemAmount":"248",
      "openinvoicedata.line2.itemVatAmount":"52",
      "openinvoicedata.line2.itemVatPercentage":"2100",
      "openinvoicedata.line2.numberOfItems":"2",
      "openinvoicedata.line2.productUrl":"URL_TO_PURCHASED_ITEM",
      "openinvoicedata.line2.imageUrl":"URL_TO_PICTURE_OF_PURCHASED_ITEM"
   },
   "reference":"YOUR_CAPTURE_REFERENCE"
}

You will receive a /capture response containing a pspReference associated with this request. Once we have processed your request, you will also receive a CAPTURE notification. For more information, refer to Capture.

Partial captures

To partially capture a Klarna payment, specify in your call to the /capture endpoint:

modificationAmount: The amount that the shopper should pay. This should be less than the authorised amount.
additionalData.openinvoicedata: Price, product and optionally shipping and tracking information for the items that the shopper should pay for, to be included on the invoice. For the partial capture to be successful, the amounts stated in openinvoicedata need to be correct. You can use the same fields as listed in the manual captures section.

For more information and an example, refer to Invoice lines.

Recurring payments

To make recurring Klarna payments you need to:

Create a shopper token.
Use the token to make future payments for the shopper.

Not all Klarna payment methods or countries support recurring payments. For information about the availability of recurring payments, refer to Klarna documentation.

Create a token

To create a token, include in your /payments request:

storePaymentMethod: true
shopperReference: Your unique identifier for the shopper.

When the payment has been settled, you receive a notification webhook containing:

eventCode: RECURRING_CONTRACT
originalReference: The pspReference of the initial payment.
pspReference: This is the token that you need to make recurring payments for this shopper.

Make sure that your server is able to receive RECURRING_CONTRACT as part of your standard notifications. If you have not requested this additional configuration yet, contact our Support Team.

https://docs.adyen.com/payment-methods/klarna/api-only#recurring-contract-notification

RECURRING_CONTRACT notification

  {
     "live":"false",
     "notificationItems":[
        {
           "NotificationRequestItem":{
              "additionalData":{
                 "shopperEmail":"youremail@email.com",
                 "shopperReference":"YOUR_UNIQUE_SHOPPER_ID"
              },
              "amount":{
                 "currency":"SEK",
                 "value":1000
              },
              "eventCode":"RECURRING_CONTRACT",
              "eventDate":"2019-11-27T16:41:42+01:00",
              "merchantAccountCode":"YOUR_MERCHANT_ACCOUNT",
              "merchantReference":"TestRef",
              "originalReference":"8515748691833061",
              "paymentMethod":"klarna_paynow",
              "{hint:The token for making recurring payments}pspReference{/hint}":"8315748692943051",
              "reason":"",
              "success":"true"
           }
        }
     ]
  }

Make a payment with a token

To make a payment with the token, include in your /payments request:

shopperReference: The unique shopper identifier that you specified when creating the token.
paymentMethod.storedPaymentMethodId: The pspReference from the RECURRING_CONTRACT notification. You can also get this value by using the /listRecurringDetails endpoint.
shopperInteraction: ContAuth.
recurringProcessingModel: The type of recurring payment that you want to make. Possible values:

`recurringProcessingModel`	Description
CardOnFile	Online purchase where shopper is actively making a purchase using their previously stored payment details.
Subscription	A series of transactions with fixed or variable amounts, following a fixed time interval. This is the default value for payment requests where `shopperInteraction`: ContAuth.
UnscheduledCardOnFile	Contracts that occur on a non-fixed schedule using stored payment details. For example, automatic top-ups when cardholder's balance drops below certain amount.

When making a recurring payment, you also need to provide all the parameters required for a Klarna payment request.

A sample request for Klarna — Pay now, when the shopper is actively making a purchase using previously stored payment details:

https://docs.adyen.com/payment-methods/klarna/api-only#-payments-request

/payments request

  {
    "merchantAccount":"YOUR_MERCHANT_ACCOUNT",
    "reference":"YOUR_ORDER_REFERENCE",
    "paymentMethod":{
       "type":"klarna_paynow",
       "{hint:The pspReference from the RECURRING_CONTRACT notification}storedPaymentMethodId{/hint}":"8315748692943051"
    },
    "{hint:The shopperReference that you specified when creating the token}shopperReference{/hint}":"YOUR_UNIQUE_SHOPPER_ID",
    "amount":{
       "currency":"SEK",
       "value":"1000"
    },
    "shopperInteraction":"ContAuth",
    "recurringProcessingModel": "CardOnFile",
    "shopperLocale":"en_US",
    "countryCode":"SE",
    "telephoneNumber": "+46 840 839 298",
    "shopperEmail":"youremail@email.com",
    "shopperName":{
       "firstName":"Testperson-se",
       "gender":"UNKNOWN",
       "lastName":"Approved"
    },
    "billingAddress":{
       "city":"Ankeborg",
       "country":"SE",
       "houseNumberOrName":"1",
       "postalCode":"12345",
       "street":"Stargatan"
    },
    "deliveryAddress":{
      "city":"Ankeborg",
      "country":"SE",
      "houseNumberOrName":"1",
      "postalCode":"12345",
      "street":"Stargatan"
    },
    "returnUrl":"https://your-company.com/checkout?shopperOrder=12xy..",
    "lineItems":[
       {
          "quantity":"1",
          "amountExcludingTax":"331",
          "taxPercentage":"2100",
          "description":"Shoes",
          "id":"Item #1",
          "taxAmount":"69",
          "amountIncludingTax":"400",
          "productUrl": "URL_TO_PURCHASED_ITEM",
          "imageUrl": "URL_TO_PICTURE_OF_PURCHASED_ITEM"
       },
       {
          "quantity":"2",
          "amountExcludingTax":"248",
          "taxPercentage":"2100",
          "description":"Socks",
          "id":"Item #2",
          "taxAmount":"52",
          "amountIncludingTax":"300",
          "productUrl": "URL_TO_PURCHASED_ITEM",
          "imageUrl": "URL_TO_PICTURE_OF_PURCHASED_ITEM"
       }
    ]
  }

Test and go live

Before accepting live payments, test your integration using the test environment and sample data provided by Klarna.
You can then check the status of Klarna test payments in your Customer Area > Transactions > Payments.

Before you go live

Make sure that:

You have considered Klarna's legal and privacy information.
You follow the Klarna guidelines on how to display Klarna in your checkout.
The invoice lines and VAT are displayed correctly on Klarna's pages.
If a shopper gets rejected by Klarna, you offer them another payment method.
You pass the shopper's name and address in your payment request. While optional, providing these parameters improves the shopper experience and increases conversion rates.

Testing in live environment

If you are going to test Klarna payments once you are in the live environment, make sure that you:

Provide real shopper data. For example, your real name, personal email, personal mobile, and home and billing address. Don't provide a company address as billing address.
Choose an item with a reasonable amount that meets Klarna's minimum requirements. For example, for Pay over time, Klarna requires a minimum amount of 35 GBP. Klarna can reject a request if the product is too expensive and they do not have enough transaction history for the shopper.
Don't perform multiple tests in a short span of time from the same device or IP address. This will trigger velocity rule checks, which will lead to the transaction being rejected.

If the conditions above are not met, you might receive a resultCode of Refused . The shopper sees a page with an "Option Not Available" message instead of the Klarna Payments widget. Note that these checks are bypassed in test and are only applied in the live environment.