PostFinance Checkout is the most practical all-in-one payment solution for Swiss online shops – a contractual partner, a plug-in and five payment options for your customers: PostFinance Card, PostFinance e-finance, TWINT, Visa and Mastercard.

Integrate the relevant plug-in quickly and easily into your standard shop system, directly into Shopify or into an ECWID online shop. Specialists can also connect PostFinance Checkout to their own online shop development via REST web services.

The English documentation for the technical integration of PostFinance Checkout is intended for web agencies and software developers.

1.1Basic functions

Find out more about the back office functions of PostFinance Checkout: What is a space? How can templates be used? How can webhooks etc. be configured?


Find out how to process and manage your payments.

1.3Integration with plug-ins

Integrate PostFinance Checkout into your shop system with the corresponding plug-in. More information can be found in the relevant instructions in English:

More information and SDK documentation in English can be found in our GitHub account:

1.4Connection with connected services

Connect PostFinance Checkout to SaaS shop solutions - we are constantly endeavouring to expand the service:

1.5Connection with web services

PostFinance Checkout can also be used to connect your online shop via a modern REST API. This platform-independent API can be used by any supported programming platform. Our software development kits (SDK) make it easier to integrate an individual solution. SDKs bridge the gap between the platform-independent REST interface (based on modern, open web standards).

More information and SDK documentation in English can be found in our GitHub account:

1.6User manuals for the PAX payment terminals

The following instructions will support you in activating and configuring your payment terminal:


Do you have questions about PostFinance Checkout or integration? Please have a look through the documentation and read the FAQ. If you have any further questions, please contact our support team.