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The many sides of Open API adoption

BPC Sep 27, 2023 9:01:11 AM

Open Banking is not just a trend but a transformative force, driving a sea change in how consumers and businesses interact with financial services. Central to this transformation are Application Programming Interfaces (APIs), which serve as the bridge between financial institutions and third-party services. As we delve deeper into the realm of Open Banking, understanding the variations in API design and deployment becomes crucial. This post seeks to shed light on these variations and introduce two primary models that provide solutions: the "Many to Many" networks and the "National Switch" network.


The Importance of Open APIs in Open Banking

APIs act as connectors, allowing different software applications to communicate and share data seamlessly. In the context of Open Banking, these APIs play a pivotal role in enabling third-party providers to access customer data securely and offer innovative services. For instance, by leveraging open APIs, a utility company can partner with a bank to offer instant payments or even loyalty schemes. The possibilities are vast, but the road to harnessing them requires navigating the diverse landscape of API designs.


Differences in Adoption of Open APIs in Various Markets

While the European Open Banking model is still maturing, the global landscape paints a varied picture. Different markets adopt unique API standards, leading to discrepancies that can hinder the universal application of Open Banking services. These disparities arise from factors like varying regulations, market dynamics, and technological advancements in different regions.


Two Models - "Many to Many" Networks and "National Switch" Network

Our report "The Open Banking revolution needs flexible API connectivity” highlights two primary strategies to address the variation in API templates: the “Many to Many” networks and the “National Switch” network.


Exploring the “Many to Many” Networks Model

This model promotes the creation of an extensive network of APIs between banks and various third parties, such as telecommunication providers, utility companies, and retailers.

Under this setup, banks and third parties design a multitude of APIs, tailored to cater to a diverse range of digital services. From a user's perspective, this means accessing services like balance inquiries, money transfers, and bill payments from within their chosen apps.

The "Many to Many" model has paved the way for instant payments, advanced credit scoring mechanisms, efficient refunds, and innovative subscription payment systems, amongst others.

For banks, this model offers increased touchpoints with customers, an expanded service portfolio, and potentially higher transaction volumes. Customers, on the other hand, enjoy the convenience of accessing a plethora of services from a single platform and the promise of tailored offerings based on their preferences.


Understanding the "National Switch" Network Model

A contrasting approach, the "National Switch" model, hinges on centralization.

In this setup, Central Banks in specific markets introduce a uniform platform with a standardised set of APIs. These APIs are then adapted for diverse use cases, ensuring consistency and streamlining the integration process.

Central Banks play a central role by establishing the foundational infrastructure. They ensure the system remains secure, efficient, and responsive to market needs.

The primary advantage is uniformity, which simplifies integration for third parties. This model also reduces potential friction points and ensures faster transaction processing. Consumers and businesses stand to benefit from real-time services like account-to-account payments, Variable Recurring Payments, and Request to Pay systems.



While the journey of Open Banking is lined with challenges, the two models - "Many to Many" and "National Switch" - offer effective solutions to the issue of API variations. As we reflect upon the future of Open Banking, it is evident that understanding and adopting the right model will be instrumental in shaping a seamless and customer-centric financial ecosystem.