The payments API is used to create a session to offer Klarna's payment methods as part of your checkout. As soon as the purchase is completed the order should be read and handled using the [`Order Management API`](https://docs.klarna.com/api/ordermanagement). **Note:** Examples provided in this section includes full payloads, including all supported fields , required and optionals. In order to implement a best in class request we recommend you don't include customer details when initiating a payment session. Refer to [Initiate a payment](https://docs.klarna.com/klarna-payments/integrate-with-klarna-payments/step-1-initiate-a-payment/) section for further details. Read more on [Klarna payments](https://docs.klarna.com/klarna-payments/).

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tuutti/php-klarna-ordermanagement

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The Order Management API is used for handling an order after the customer has completed the purchase. It is used for all actions you need to manage your orders. Examples being: updating, capturing, reading and refunding an order. Read more on the [Order management](https://docs.klarna.com/order-management/) process. # Authentication

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tuutti/php-klarna-checkout

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The checkout API is used to create a checkout with Klarna and update the checkout order during the purchase. As soon as the purchase is completed the order should be read and handled using the [`Order Management API`](https://docs.klarna.com/api/ordermanagement).\n\nRead more on [Klarna checkout](https://docs.klarna.com/klarna-checkout/).

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