10 Examples of Open Banking APIs

10 Examples of Open Banking APIs

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The financial services industry is experiencing a shift towards openness and transparency thanks to the emergence of open banking. Open banking is a global initiative that seeks to create a level playing field for all financial services providers by allowing them to share customer data and integrate their services through application programming interfaces (APIs).

In this blog post, we’ll be taking a deep dive into the world of open banking to explore some of the top APIs available in the market today. Whether you’re a financial services provider or a developer looking to build new fintech applications, these APIs are sure to provide you with the tools you need to succeed. So, let’s get started!

What Are Open Banking APIs?

Open banking APIs facilitate the sharing of banking data and services between different financial institutions, third-party providers, and customers. The primary objective of open banking APIs is to enable seamless and secure data sharing between banks and other authorized third-party providers and enhance transparency and competition in the banking industry.

Open banking APIs provide customers with greater control over their financial data and enable them to securely share their banking information with third-party providers, allowing for more personalized and tailored financial products and services. Open banking is founded on the notion that customers should be able to access and use their banking data in ways that benefit them the most, thereby driving innovation and growth in the financial sector.

Why Are APIs Important In Open Banking?

Web APIs are essential components in the world of open banking. They allow banks and financial institutions to share their data and services with third-party providers, such as fintech startups, in a secure and standardized manner.

APIs enable open banking by facilitating communication between different systems and platforms, allowing seamless integration and interoperability. By providing a standard interface for data sharing, APIs make it easier for third-party providers to access financial data and services, such as account balances, transaction history, and payment initiation.

Moreover, APIs allow banks and financial institutions to create new revenue streams by monetizing their data and services, as they can charge fees for the use of certain APIs. They also enable them to reach new customers and expand their offerings by partnering with third-party providers. APIs are also important in open banking because they promote innovation and competition in the financial services industry.

In summary, APIs are critical to the success of open banking, as they enable secure and standardized data sharing between different systems and platforms, create new revenue streams, promote innovation and competition, and improve customer experience.

With the rise of open banking, many banks worldwide are opening up their APIs to third-party developers to create new products and services. Here are ten examples of banks with open APIs leading the way in this space.

For more context, watch our LiveCast ‘APIs and Open Banking’:

1. Capitol One DevExchange API

Capital One, one of the largest banks in the United States, has opened its APIs to developers through its DevExchange platform. This platform enables developers to build custom integrations and apps that leverage Capital One’s data and services.

The DevExchange API includes access to features such as account balance, transaction history, and reward points. Developers can use these features to create applications that offer personal financial management, rewards tracking, and much more.

One unique aspect of the Capital One DevExchange is its focus on collaboration between the bank and the developer community. The bank offers resources and support to developers to help them build and launch successful applications using the API.

2. Barclays

Barclays is one of the top banks in the world that has opened its API to developers. Barclays offers an extensive range of APIs that developers can use to create innovative banking solutions.

Barclays offers the Barclays Developer Network, providing developers with access to a range of APIs, such as account information, payments, customer data, and authentication services. One of the popular Barclays APIs is the Payment Initiation API, which enables third-party providers to initiate payments on behalf of customers.

3. Citi Developer Hub

Citi is another bank that has embraced open banking by launching its own API platform, the Citi Developer Hub. This platform allows developers to access APIs for various Citi services, including payments, account management, and credit card rewards. The platform also offers resources for developers to build and test their own applications using these APIs.

Citi also provides access to APIs that can help with compliance and regulatory requirements, such as the Payment Initiation API and the Know Your Customer API. These APIs make it easier for developers to comply with regulations while providing innovative solutions to customers.

4. BBVA API Market

BBVA has an open banking API program called BBVA API Market that provides access to a wide range of APIs, including account information, payment initiation, transaction history, and more. With BBVA’s APIs, developers can access account information, make payments, and manage money in real-time.

With BBVA API Market, developers can access a wide range of APIs and developer resources to help them build and test their solutions. Additionally, BBVA provides documentation, code samples, and a dedicated support team to help developers get started quickly.


HSBC is a major bank that has embraced the open banking concept. The bank has implemented various APIs allowing third-party developers to access customer account information, payment processing, and transaction history. HSBC has designed its APIs to support different banking services, such as current accounts, savings accounts, and mortgages.

6. Tikkie

Tikkie is an open API developed by the Dutch bank, ABN AMRO. This API allows developers to integrate Tikkie’s payment service directly into their applications, making it easier for users to send and receive payments.

Tikkie’s API offers various features, including real-time notifications of payments and the ability to view payment details. With this API, developers can customize the user experience to meet the needs of their applications, which could lead to increased engagement and retention rates.

7. Deutsche Bank

Deutsche Bank is another major bank that has jumped onto the open banking trend. The bank offers various APIs through its platform, including the Payment Initiation API, which enables businesses to initiate payments through the Deutsche Bank system.

In addition, Deutsche Bank also provides APIs that enable businesses to access their account information, retrieve historical transactions, and even initiate wire transfers. One example of their APIs is the Cash Management API, which is designed for treasury teams that require real-time account balance and transaction data to optimize their cash management operations.

8. Bank of Scotland API

Bank of Scotland is one of the major players in the open banking space. Their API allows developers to create apps that offer account information, transaction details, and payments. The Bank of Scotland API can be accessed through their Developer Portal, which offers various tools and resources to help developers get started.

With Bank of Scotland’s API, developers can create apps offering various financial services. For instance, an app can provide users with account balances, transaction history, and notifications of upcoming payments or charges.

9. Nordea

Nordea is one of the largest banks in the Nordics and has a significant presence in Europe. Their open banking APIs allow developers to access and retrieve customer account data, payment initiation, and transaction data.

One notable API that Nordea offers is the Account Information API, which provides access to real-time account information, transaction history, and balance data. With this API, developers can retrieve account information for all types of accounts, including loans, savings, and credit card accounts. This can help developers build innovative financial services applications that enable customers to manage their accounts better.

Watch Gunnar Berger from Nordea present at the Nordic APIs Platform Summit:

10. Commerzbank

Commerzbank is another banking institution that has embraced open banking by creating its own API platform, Commerzbank Developer Portal. The portal offers a wide range of APIs that developers can use to build innovative applications and services. With Commerzbank’s API, developers can access customer account information, payment services, transaction data, and much more.

The platform also includes various sandbox environments that enable developers to test their applications and services before going live. One of the most popular APIs on the Commerzbank Developer Portal is the Payment Initiation API, which allows developers to initiate payments on behalf of customers. This API complies with the Payment Services Directive (PSD2) regulations, ensuring secure and seamless payments.

What Can Developers Do With These APIs?

Open Banking APIs have unlocked a new world of opportunities for developers to create innovative financial solutions. Here are just a few things developers can do with these APIs:

  • Access customer financial data: Developers can use open banking APIs to access financial data from bank accounts and use it to build new financial tools and services.
  • Enable secure payment processing: APIs can be used to facilitate payments directly from bank accounts, providing a seamless experience for customers that’s safer than screen scraping.
  • Build personalized financial services: Developers can use open banking APIs to build services tailored to each customer’s individual needs and preferences.
  • Enhance fraud prevention: With APIs, developers can analyze transactional data in real-time to identify potential fraud and take action to prevent it.
  • Create budgeting and savings tools: APIs can be used to help customers better manage their finances by offering tools that help with budgeting, saving, and investment strategies.
  • Streamline financial operations: By automating financial operations with APIs, developers can help businesses save time and money on administrative tasks such as accounting and invoicing.
  • Offer loan and credit solutions: APIs can be used to assess a customer’s creditworthiness and offer loan or credit solutions tailored to their needs.
  • Provide financial education: Developers can use open banking APIs to offer educational resources and financial literacy tools to help customers improve their financial knowledge and make better decisions.
  • Deliver new digital services: APIs enable developers to create new digital services, such as chatbots and virtual assistants, that can help customers with financial transactions and inquiries.
  • Integrate with third-party services: Standard APIs make it easier for developers to integrate with third-party services, such as accounting software and payment gateways, to create seamless customer experiences.

Overall, the possibilities are endless when it comes to what developers can do with open banking APIs. As long as they adhere to regulations and ensure data privacy and security, developers have the potential to create innovative and transformative financial solutions that can benefit customers and businesses alike.

Learn how to protect open banking in our LiveCast ‘Securing Open Banking’:

How Are They Different From Each Other?

Open banking APIs vary significantly in terms of their functionality and scope. Some APIs focus specifically on payment processing, while others may provide access to more comprehensive financial data.

In addition to differences in functionality, APIs can vary in ease of use and developer experience. Some APIs may provide comprehensive documentation and developer support, while others may require more technical expertise to navigate and integrate with. For example, the Citi Developer Hub offers extensive resources and support for developers, including a dedicated developer forum and access to Citi’s APIs. In contrast, HSBC API may require higher technical skills and expertise.

Overall, the differences between open banking APIs can make a significant impact on the capabilities and user experience of applications developed using these APIs. As such, developers should carefully evaluate the various options available to determine which API is best suited to their specific needs and use cases.

How to Secure Personal Information and Financial Data

The security of personal information and financial data is a top priority for banks, fintech, and other financial institutions. Open Banking APIs have taken measures to ensure that they keep personal and financial data safe and secure. Here are some ways that these APIs secure data:

  • Authentication: API providers require that developers authenticate themselves to access APIs. This process usually involves a secure token exchange between the two parties.
  • Encryption: API providers use encryption to secure sensitive data transmitted between servers and devices. The encryption ensures that data is only accessible by authorized parties.
  • Authorization: Developers must have permission to access specific APIs, which can help prevent unauthorized access to sensitive data.
  • Compliance: API providers must comply with security standards such as the General Data Protection Regulation (GDPR) and the Payment Services Directive 2 (PSD2) to ensure the security of data.
  • Monitoring: API providers should have measures in place to monitor API usage and detect any suspicious activity. This can include alerts for unauthorized access attempts, unusual data transfer volumes, or suspicious behavior patterns.
  • Partnerships: Some API providers work with third-party security vendors to ensure the security of their APIs. This may involve partnering with cybersecurity firms or leveraging advanced security tools.

Overall, the security of personal information and financial data is of utmost importance in the open banking world. API providers can take steps to ensure that data remains secure throughout the API development process, including during transmission, storage, and access. By implementing these security measures, open banking APIs can provide developers with the confidence to build innovative and secure financial products and services.

Open Banking APIs: The Bottom Line

Open banking APIs have revolutionized the way we manage our finances. They provide developers with a platform to create innovative solutions that offer greater financial control. With a vast array of open banking APIs available, developers can leverage the different features and benefits of each to build unique products that cater to specific financial needs.

However, with the growing importance of open banking APIs, it is equally crucial to ensure that personal information and financial data are secure. Most API providers employ strict security measures to protect sensitive data, and developer users are equally responsible for following best practices in data protection.