API Overview

Klarna Integration Developer Guide
- Recent Revisions to This Document
- VISA Platform Connect: Specifications and Conditions for Resellers/Partners

Introduction to Klarna Integration
- Merchant Account Types

Overview of Processing Klarna Transactions
- HOP Session Workflow
- Inline Session Workflow
- Widget Installation for Inline Workflow
- Refunding a Payment Workflow
- Reversing an Authorized Payment Workflow
- Transaction Statuses Workflow

Klarna API Requests
- Creating a HOP Session
- Creating an Inline Session
- Updating a Session
- Authorize a Payment
- Update an Authorized Payment
- Reverse an Authorized Payment
- Capture a Payment
- Refund a Payment
- Check a Request Status

Reference Information
- Calculating the Grand Total Amount
- Using Line Items
- Reason Codes and Klarna Response Codes
- Klarna Chargebacks
- Generating Reports In the Business Center
- Simple Order API Field Map

On This Page

Recent Revisions to This Document

26.03.01

Updated processing workflows see Overview of Processing Klarna Transactions.

25.01

Added support for Klarna chargeback notifications. See Klarna Chargebacks.

Add new status for chargebacks. See Capture a Payment and Check a Request Status.

Updated and added new workflow graphics that describe how to process Klarna transactions. See Overview of Processing Klarna Transactions.

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