Shopware 5 Klarna Checkout API Update Required by March 31st: Community Seeks Solutions

Shopware 5 Klarna Checkout API Update: A Looming Deadline

A Shopware 5 merchant initiated a discussion regarding a critical update required for the Klarna Checkout API. According to the original poster (MFT), Klarna (now Kustom) is requiring a code modification to switch the API endpoint from Klarna.com to Kustom.co for continued functionality after March 31st, 2026. This change purportedly affects a plugin previously maintained by BestIT, who are no longer supporting it.

The merchant expressed concern that this update is essential for their Shopware 5 store, as many customers rely on Klarna for payments. PayPal is not considered a viable alternative. The core question posed was whether others are facing the same issue and if any workarounds exist.

Key Discussion Points:

• The Problem: The Klarna Checkout API needs to be updated in Shopware 5 plugins to point to Kustom.co instead of Klarna.com to avoid service disruption after March 31st, 2026.
• Affected Plugin: The plugin in question was initially from BestIT, but they no longer offer support.
• Developer Identification: Another user (Max_Shop) pointed out that the plugin might have been developed by 426 GMBH, referencing documentation on klarna-shopware.426-upgrade.com.
• Plugin Version: MFT confirmed using “Klarna Checkout für Shopware 5” version 1.5.3.
• Possible Solution: Another user (NextMike) suggested SafeFive (safefive.de) as a potential solution provider.

Translation of Key German Phrases:

• "Klarna Checkout API Anpassung zum 31.03 notwendig?" translates to "Klarna Checkout API adjustment necessary by March 31st?"
• "laut Klarna bzw. jetzt ja Kustom müsste zur weiteren Nutzung des PlugIns die API von Klarna.com auf Kustom.co im Code geändert werden" translates to "according to Klarna or rather now Kustom, for further use of the plugin, the API from Klarna.com must be changed to Kustom.co in the code."
• "Wer hat das gleiche Problem und gibt es evtl. ein Workaround?" translates to "Who has the same problem and is there possibly a workaround?"

Implications for Shopware 5 Merchants:

Shopware 5 merchants using the Klarna Checkout plugin need to investigate whether their plugin requires this API update. If so, they need to find a solution, either through manual code modification, a plugin update from the original developer (if available), or by engaging a third-party developer.

The discussion highlights the challenges of maintaining e-commerce platforms and the importance of staying informed about API changes and plugin updates. Merchants should proactively check for compatibility issues and plan for necessary updates to ensure continued functionality of their online stores.