Published Date: 08 September 2023

Open Banking API integrations: Data security in the financial sector


The financial services sector is a highly regulated domain, governed by strict data security rules. This stringency is imperative for ensuring users’ financial data remains confidential – but has also resulted in a cautiousness towards technology that may have inadvertently slowed the progress of digital transformation.

The growing role of Open Banking is to bridge this gap between old banking systems and new digital technology.

An Open Banking API integration allows users to connect their financial accounts with third-party apps and platforms in a controlled and secure way. This interoperability opens pathways for innovation, enabling banks to modernise and streamline their services while still adhering to the industry's stringent security standards.

It also opens the floor to fintech businesses and new applications that are helping propel banking services into a new era of accessibility and convenience.


What is an API?

API stands for Application Programming Interface. It’s a set of protocols, tools, and rules that allows different software applications to communicate and interact with each other.

In the context of finance, APIs play a pivotal role in connecting banking platforms with third-party applications. This technology enables secure and efficient communication between platforms, allowing them to share data and functionalities.

Open Banking API integrations empower businesses and individuals to access, interact with, and leverage financial information and services across various applications. They enhance operational efficiency, improve customer experiences, and support better financial decision-making.


Types of API integrations

  • Internal APIs

Internal APIs are also sometimes known as private APIs. As the name suggests, they’re used within financial institutions to help support automation, improve data security, and manage product development internally.


  • Partner APIs

Partner APIs provide seamless data communication between two specific organisations, such as a bank and a third-party financial management tool.


  • Open APIs

Open APIs differ from Partner APIs by making financial data available to multiple third-party service providers, rather than just one. The API only shares consumer data with their permission and requires regular renewal of permission to maintain the connection.


What is Open Banking?

Open Banking is a financial system that uses standardised APIs to share customer banking data – with their explicit consent – with other financial institutions and authorised third-party providers.

The practise promotes transparency, competition, and innovation within the banking industry. It allows third-party financial service providers, like fintech companies, to access and use customer data to develop new and improved products and services.

Open Banking APIs also offer customers greater control over their own finances. For instance, users can choose to integrate their bank account data with third-party apps to conveniently track their expenses, manage their savings, and plan for the future.


Benefits of Open Banking API integrations

API integrations play a pivotal role in modernising traditional financial services. Advocates of Open Banking highlight several key benefits to both financial services companies and their customers:


  • Better user experience

Open Banking APIs enhance overall consumer experience by moving traditional systems online, promoting interoperability, and improving personalisation.

Financial management becomes a much easier and more streamlined process for users, and businesses can use consumer information to help deliver improved services.


  • Reduced operational costs

Streamlining financial processes through API integrations significantly reduces operational complexities. Automated data exchanges and transactional capabilities help curb administrative overheads, reduce human error, and also free up staff to focus on value-added tasks, enhancing the cost-effectiveness of financial operations.


  • Increased competition

Open Banking APIs support increased market competition, allowing fintech innovators to develop new solutions that fill specific gaps in traditional banking services. This includes specialised tools such as budgeting apps, investment advisory services, or credit-scoring solutions.

This dynamic ecosystem also forces financial institutions to continuously improve their services and adapt to changing customer demands.


  • Improved security

Contrary to concerns, API integrations actually improve financial data security. They encourage a shift towards more secure data-sharing protocols and robust authentication mechanisms.

The implementation of features like Transport Layer Security (TLS) encryption and two-factor authentication (2FA) also allows financial institutions to detect anomalies more effectively and respond promptly to potential breaches.


Technical challenges in financial API integrations

Open Banking presents several specific technical challenges for developers:


  • Data Security

Striking the balance between data accessibility and data security is the most obvious challenge of Open Banking integrations. APIs must facilitate the sharing of sensitive data to external applications, without compromising on security.


  • System interoperability

The financial industry encompasses a wide array of institutions, each with their own unique technological infrastructure and protocols. Open Banking API integrations can help achieve seamless cooperation between these diverse systems.


  • Data consistency

Ensuring accurate and up-to-date information across different platforms is a crucial aspect of Open Banking. Discrepancies in financial data can lead to confusion, errors, and misinformed decisions. However, maintaining consistency becomes more complex when multiple systems need to interact and share data.


I‑Finity are your Open Banking API experts

Open Banking APIs offer many advantages to financial businesses and those providing financial services. Whether you have an idea for a new software as a service product or already have a solution that requires further technical support and architecture, I‑Finity has the technical expertise and proven experience in financial services to help you achieve your business goals.

We have been through the complete security vetting process by Open Banking, which gives us access to the technical framework needed to deliver these highly secure implementations and APIs to our customers. Within the financial services sector we have an Open Banking integration for a Expense Management Software that we provide ongoing development support for

First, we’ll assess and/or audit your existing and proposed operating processes to determine the best approach. Then we’ll work with you to strengthen any existing APIs, architect a custom API, integrate with third-party APIs, or deliver a combination of approaches depending on the exact needs of your project.

Our team follows all best practises needed to protect you and your client’s data, ensuring compliance with all the financial regulations of this highly regulated industry.

Contact us about your Open Banking API requirements today.