Seamless Financial APIs

The API portal of wallis

The wallis API portal gives you access to all released data and functions of the savings banks and other banks. This allows you infinite solutions - to the point - for millions.

Our API areas at a glance


  • The XS2A interface of the Sparkassen-Finanzgruppe with regulated access options according to PSD2
  • Individual APIs with access to the core banking of the Sparkassen-Finanzgruppe


  • Open Banking API with access to all relevant banks in Germany
  • One API, many services – account information service and payment initiation service
  • Soon also usable for your customers without your own PSD2 authorisation

Coming soon

  • Further APIs around the topics of banking, brokerage and insurance
Unlimited possibilities.

wallis is the perfect enabler for your ideas. The portal gives you access to all APIs of the Sparkassen-Finanzgruppe and our partners. Together, we enable innovative services and new business models along the business strategy of the Sparkassen-Finanzgruppe - also for Sparkassen and alliance partners.

Always at eye level.

Implement your innovative products and business models hand in hand with wallis. We always speak your language. No matter whether you are currently founding, part of a start-up, grown-up or represent a company of the Sparkassen-Finanzgruppe.

We for you.

The experienced wallis team consists mainly of developers. We focus on your needs and continuously develop wallis for you. We have already developed and marketed innovative solutions for the Sparkassen Innovation Hub (S-Hub) and a number of fintechs. Benefit from this experience and from the fact that, as a spin-off of the S-Hub, we have the direct support of Finanz Informatik (FI), one of the largest IT service providers in Europe. This is how we give you deep insights into the Sparkassen-Finanzgruppe.

wallis is the right choice for you.

Developers first.

wallis offers you detailed technical documentation and enables you to get started immediately with your developments.

Security is important to us.

We operate wallis in data centres within the Sparkassen-Finanzgruppe and guarantee the highest security standards.

Many years of experience.

Interface-based banking services have been our daily business for around 20 years. You benefit from this experience when working with wallis.

Powered by Sparkasse.

We operate wallis on behalf of Finanz Informatik (FI) for the German Sparkassen-Finanzgruppe. So we offer you deep insights and direct access.


Are you more of a speedboat than a big tanker? So are we. wallis consists of an agile team that is fully focused on your needs.


We offer you a wide range of solutions: From Open Banking to XS2A to exclusive and individual API services.

Our Use Cases

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