Update a session

session_id

The acquiring channel in which the session takes place. Ecommerce is default unless specified. Any other values should be defined in the agreement.

One ofECOMMERCEIN_STORETELESALES

Extra Merchant Data (additional information) required for additional risk check. The required parameters will be described in the appendix of contract agreement.

Authorization token.

Provide the billing address of the customer, if you have collected already. If not, then Klarna will collect the details inside the iFrame before authorization.

Token to be passed to the JS client

Promo codes - The array could be used to define which of the configured payment options within a payment category (pay_later, pay_over_time, etc.) should be shown for this purchase. Discuss with the delivery manager to know about the promo codes that will be configured for your account. The feature could also be used to provide promotional offers to specific customers (eg: 0% financing). Please be informed that the usage of this feature can have commercial implications.

Object to provide the details of the customer making the payment.

Design package to use in the session. This can only by used if a custom design has been implemented for Klarna Payments and agreed upon in the agreement. It might have a financial impact. Delivery manager will provide the value for the parameter.

Session expiration date

Used to define the language and region of the customer. The locale follows the format of [RFC 1766](https://datatracker.ietf.org/doc/rfc1766/), meaning its value consists of language-country. Read more on **[Supported Locals and Currencies](https://docs.klarna.com/klarna-payments/in-depth-knowledge/puchase-countries-currencies-locales/)**.

Pass through field to send any information about the order to be used later for reference while retrieving the order details (max 6000 characters)

Used for storing merchant's internal order number or other reference.

Used for storing merchant's internal order number or other reference. The value is available in the settlement files. (max 255 characters).

Used to send in the different merchant URLs that Klarna needs at different stages of the process.

Design customization options for the Klarna Payments iframe. The design options are limited to changing colors. It is not possible to change the font or other designs at the moment.

Total amount of the order including tax and any available discounts. The value should be in non-negative minor units. Eg: 25 Euros should be 2500.

The array containing list of line items that are part of this order. Maximum of 1000 line items could be processed in a single order.

URL to an image that can be later embedded in communications between Klarna and the customer. (max 1024 characters). A minimum of 250x250 px resolution is recommended for the image to look good in the Klarna app, and below 50x50 px won't even show. We recommend using a good sized image (650x650 px or more), however the file size must not exceed 12MB.

Used for storing merchant's internal order number or other reference. Pass through field. (max 1024 characters)

Descriptive name of the order line item.

Additional information identifying the order line item.

URL to the product in the merchant’s webshop that can be later used in communications between Klarna and the customer. (max 1024 characters)

Quantity of the order line item. Must be a non-negative number.

Unit used to describe the quantity, e.g. kg, pcs, etc. If defined the value has to be 1-8 characters.

Client facing article number, SKU or similar. Max length is 256 characters.

Tax rate of the order line. Non-negative value. The percentage value is represented with two implicit decimals. I.e 2000 = 20%.

Total amount of the order line. Must be defined as minor units. Includes tax and discount. Eg: 2000=20 euros Value = (quantity x unit_price) - total_discount_amount. (max value: 200000000)

Non-negative minor units. Includes tax. Eg: 500=5 euros

Total tax amount of the order line. Must be within ±1 of total_amount - total_amount 10000 / (10000 + tax_rate). Negative when type is discount.

Type of the order line item.

One ofphysicaldiscountshipping_feesales_taxdigitalgift_cardstore_creditsurcharge

Price for a single unit of the order line. Must be defined as minor units and exclude any discount. Typically including taxes, however some countries may include specific requirements, see [Tax handling guidelines](https://docs.klarna.com/payments/web-payments/additional-resources/error-handling-and-validations/tax-handling/) for further details. (max value: 200000000)

Subscription details

Total tax amount of the order. The value should be in non-negative minor units. Eg: 25 Euros should be 2500.

Available payment method categories

Asset URLs for the payment method. Using this dynamic asset will make sure that any design update of Klarna will automatically be propagated.

ID of the payment method category to be used while loading the widget later. The possible values are:<ul><li>klarna</li><li>pay_later</li><li>pay_now</li><li>pay_over_time</li><li>direct_bank_transfer</li><li>direct_debit</li></ul>

Name of the payment method category. These names are dynamic depending on what payment method is in the category. Using this dynamic asset will make sure that any copy update of Klarna will automatically be propagated, or any updates of included payment methods by you.

The purchase country of the customer. The billing country always overrides purchase country if the values are different. Formatted according to ISO 3166 alpha-2 standard, e.g. GB, SE, DE, US, etc.

The purchase currency of the order. Formatted according to ISO 4217 standard, e.g. USD, EUR, SEK, GBP, etc.

The shipping address of the consumer. Please note that this is not needed unless the customer has explicitly chosen to enter a separate shipping address. Otherwise the billing address will be automatically cloned.

The current status of the session. Possible values: 'complete', 'incomplete' where 'complete' is set when the order has been placed.

One ofcompleteincomplete

Intent for the session. The field is designed to let partners inform Klarna of the purpose of the customer’s session.

One ofbuytokenizebuy_and_tokenize