All About Open Banking API – elaborating secrets you don’t know!

Definition of Open Banking APIs

Open banking API are transforming the financial industry by providing third-party providers with access to critical financial data, fostering innovation and improving the quality of customer service.

Financial regulators recognize the importance of open banking APIs for optimizing processes and creating new sources of income. Using standardized APIs, banks collaborate with third-party developers and financial technology companies to create innovative financial instruments and services.

Open banking allows financial institutions to open their APIs for seamless integration with third-party developers. This makes it easier to create valuable solutions such as budgeting apps and personalized services.

These APIs allow consumers to easily access banking information and services from multiple providers. Fintech software development plays a key role in the implementation and promotion of open banking initiatives, fostering innovation and improving the quality of customer service.

These symbiotic relationships stimulate competition and improve financial well-being by changing the way individuals and companies interact with their finances.

Importance and Impact on the Financial Industry

Providing hyper-personalized customer service has been the primary goal of most banking and financial institutions over the past decade. Thanks to the secure exchange of data and services through the open banking api, financial institutions can now better understand the financial behavior, needs and preferences of their customers. This helps them to offer highly personalized products and services. In addition, an open banking business promotes healthy competition by encouraging institutions to continuously improve their services to meet the growing expectations of customers. As a result, customers benefit from a wider range of innovative financial products, more user-friendly interfaces and an improved overall experience. Digital wallets, the best payment gateways and decentralized financing are all examples of how open banking can change the user interface.

Understanding Open Banking APIs

What are APIs?

APIs serve as vital links within the financial ecosystem, facilitating secure data transmission between institutions, third-party providers, businesses, and consumers. Open Banking APIs specifically connect banks’ databases with external applications, enabling a diverse range of services and personalized financial products. These APIs drive innovation and revenue generation through contextual services, leveraging customer insights and fintech innovations. Regulators recognize their role in streamlining financial systems, with data exchange improving efficiency. Open banking APIs revolutionize how users access financial services, enabling the development of innovative apps and services. Financial institutions increasingly utilize these APIs to share consumer data securely, fostering competition and innovation for the benefit of consumers.

How Open Banking APIs Work

Using the Open Banking API, banks create dedicated endpoints for third-party applications, providing encrypted access to data authorized by the consumer. Data aggregators such as Plaid serve as intermediaries, simplifying communications between fintech applications and financial institutions. This simplifies integration by allowing customers to link accounts at any institution for various financial transactions.

An open banking API that allows anyone to connect their bank account to finance a brokerage application will work as follows:

  • The financial institution establishes dedicated FDX API endpoints that other parties can call to obtain certain types of consumer-authorized information. This allows data aggregators to integrate with banking APIs to access financial account data such as account numbers, balances, and transaction history.
  • Then the developers of the brokerage application integrate with the API of the data aggregator. This gives them the ability to allow customers to link accounts through any financial institution that is also connected through the aggregator network.
  • When a customer of the trading application wants to connect their bank account to replenish their account in the application, their bank will confirm its authenticity by asking them to enter their bank account credentials (username and password). If successful, their bank will create an encrypted API token between them and the data aggregator, which includes a unique identifier, which means that the aggregator does not need to store credentials. This token creates a continuous connection between the bank account and the aggregator.
  • After a token has been created between the bank and the aggregator to establish the credentials of a new customer, the aggregator creates another token. The trading application will use this new token to make API calls to the data aggregator. When these API calls are made, the aggregator uses the banking API to obtain the financial data necessary to perform an action requested by the client, such as financing a brokerage application or transferring money from the application to his bank account.

Key Players in Open Banking Ecosystem


Many third-party financial technology players offer financial services to companies and businesses. Cashfree Payments uses APIs to provide businesses with user-friendly solutions tailored to the needs of their industry. For example, Cashfree offers bank transfer services and payments as a service for business bank accounts.

It offers 100% cashless online integration with specialized customer service managers. In addition, this platform uses the API for 100% automation and simplification of coordination. The Cashfree instant payment feature and the instant add recipients feature are popular among businesses.


YAP is a next-generation open banking API platform. It offers debit and credit cards, prepaid accounts, UPI payments, and cross-border money transfers via an AI-driven API.

Banks integrating their APIs can develop and create their own branded financial instruments that meet the specific needs of customers.


The Open credit enablement Network (OCEN) was launched on July 22, 2020 with the aim of rethinking the flow of digital lending in India. Credit service providers (ISPs) use standardized APIs to create new types of loan offers.

The protocol will help to fill the current credit deficit due to the traditional lending scheme.

Advantages of Open Banking API

The open banking API model can simplify the provision of many valuable services to both consumers and suppliers.

For example, banking organizations can collect actionable data from internal and external sources regarding purchasing habits, financial goals, and risk tolerance. This data can be used to provide more accurate multi-channel marketing and provide proactive solutions and consulting services.

Open banking API are essential for banking organizations to accelerate product development processes and respond quickly to changing digital technologies. This can help, in particular, to implement voice banking, P2P, risk management and credit processing services.

Evolve with the Customer Base

Each industry should expand its offerings over time. The new customer base is more tech-savvy and expects to access these financial products from their devices.

In fact, emerging economies such as India and China have the largest number of financial technology clients. Interestingly, more than 50% of banking customers use the services of non-traditional companies.

42.6% of the younger and more tech-savvy audience use the services of non-traditional banks and expect to continue using them. The Open banking APIs allow this customer base to access financial offers from players in the financial technology industry.

Digital-focused customers, who are regular customers of companies like Amazon, Apple and Facebook, have come to expect instant gratification. As the older generation also becomes familiar with technology, banks are under pressure to provide expertise.

Positive Customer Experience

The main reason for the growth of open banking APIs is the growth of innovation. These positive developments in the financial technology industry lead to a higher level of customer service than banks.

These financial technology players may decide to focus on specific pain points for clients. Consequently, they can offer more customized frictionless solutions. In fact, one third of all banking customers use the services of at least one third-party provider.

Fintech companies have identified and created financial offers that are easy to use, relevant and attractive. In addition, features such as high security and scalability ensure a positive customer experience.

Increased Innovation

Expertise in the field of financial technology can be used by exchanging financial data with third-party applications. Banking processes can improve at a rapid pace, while internal teams ensure continuity of service.

However, in the current scenario, fintech companies offer customers a higher positive experience (57.8%) than banks (49.5%).

Fintech companies are using technology to revolutionize financial processes. For example, clients can use APIs to add multiple recipients at the same time instead of manual input, which is prone to human error.

In fact, the relationship between improving the quality of customer service and an increase in the number of financial technology companies is obvious. This trend is observed in such fintech centers as India, the United States, the United Arab Emirates, the Netherlands and China.

In addition, facial recognition, chatbots and artificial intelligence have led to increased customer engagement. This has led to the growth of conversational banking.

New Streams of Revenue

With the coming of open banking, banks will be able to monetize their APIs. This will lead to new revenue streams. In fact, 43% of banks prefer a model where they charge a fee on every API transaction.

Banks and financial technology players have their own strengths.

Banks have huge financial capabilities and experience working with large processing networks. In addition, they have a huge customer base and customer trust. On the other hand, financial technology players have a culture that places great importance on innovation, speed, and customer satisfaction.

Together, these two organizations are more likely to generate shared revenue through collaboration and efficient use of data.

JP Morgan Chase provides an excellent example here. They teamed up with On Deck, a financial technology company, to provide loans to small businesses within a few hours. They took advantage of On Deck’s exclusive credit assessment services.

In addition, banks will benefit economically from partnerships with third parties, since they do not need to invest internal resources in technological development.  In fact, the API can help banks save money because they have access to ready-made solutions. This can help banks reduce their costs, as well as provide investment and profitability forecasts.

Banks can collect information about customers’ financial needs, purchasing habits, and risk appetite through collaboration. This will allow them to support multi-channel marketing and reduce dependence on additional costs. As a result, they can offer new financial products and increase their income.

Increased Scalability

Banks can decouple architectural components into blocks and then rejoin them through APIs. This allows for greater resiliency and a highly independent yet scalable platform.

Moreover, this helps in reducing the cost of development as it helps switch to a federated model instead of a point-to-point infrastructure.


Fintech accesses customer financial data through open banking APIs to study trends and patterns that can then be used to generate personalized financial products. They process the information through artificial intelligence to improve customer engagement.

Exploring Lesser-Known Secrets of Open Banking APIs

Data Security and Privacy Measures

Large-scale adoption of open banking has to be preceded by strong privacy laws and data protection bills. These laws establish rules for third party use.

Why are they important?

Because there are a lot of risks ranging from money laundering and data theft to terrorist financing.

Some laws are already in place for the same. For instance, the Personal Data Protection Bill of 2019, aims to protect individuals’ data.

Customer Rights

The absence of grievance redressal systems severely hampers customers’ rights. Moreover, they erase the bank or third party’s liability in case of fraudulent activity.

The RBI issued Customer Rights in December 2014 which lists laws for the protection of customer’s right to grievance redressal and compensation. Moreover, the right to privacy ensures that customers’ personal data remain private except in case of specific consent.

Compliance Risk

Open banking mandates high compliance with privacy laws and prudential regulations.

Compliance risk can arise due to penalties or damages due to supervisory actions. Moreover, they can also be caused due to an action/inaction of a third-party service provider.

Cybersecurity Risks

With the expanse of open banking and data-sharing, comes increased cybersecurity risks.

Any loss to a customer due to a data breach would require the bank or financial

institution to compensate for the same. Moreover, issues like misuse, falsification and malware are equally threatening to the institutions.

Real-Life Applications and Success Stories

Open banking case 1: Cathy and the accounting software

Cathy is a small business owner. She does the accounting for her business with a web-based accounting software. She spends a lot of time copying transaction data from her online banking software to her accounting software.

How can open banking help Cathy?

Cathy’s accounting software supports open banking. She instructs it to sync with her bank account number 1234. The accounting software requests access to account 1234 from Cathy’s bank. As a precaution, the bank asks Cathy if she really wants to share her transaction data with the accounting software – and asks her to digitally prove her identity by logging in to her bank. After this one-time setup, the data flows periodically from the bank to the accounting software. Cathy’s accounting software is always up to date – automatically.

Open banking use case 2: Cindy and the mortgage

Cindy is in the process of buying a home, but it is not easy to find one she really likes. When she finds her dream house, she wants an instant confirmation of the mortgage, so she can lock that deal in with the seller.

5. Technologies that power open banking

Financial services are based on trust, and it is vital for banks that their customers trust them. Customers should trust banks to keep their money safe, process transactions correctly, and protect their data. When banks introduce digital technologies such as open banking, they must not only improve the quality of customer service or create conditions for the emergence of dynamic digital ecosystems with a wide range of digital applications and solutions. When banks implement open banking, it is crucial that the underlying open banking technology package can establish, maintain and strengthen customer trust in their bank. What technologies are needed to participate in open banking ecosystems and how can these technologies be used to build trust with partners and customers?

When banks participate in an open banking ecosystem, they need to master several digital technologies, including APIs. APIs are used to exchange financial data in an open banking ecosystem. Using the API and surrounding technologies correctly, you can establish yourself as a reliable participant in the ecosystem with your partners and customers.

  • Partners: To establish trust with partners, it is important to secure APIs and the data they carry according to best practices; develop APIs according to established specifications and industry standards; and create a smooth onboarding experience.
  • Clients: To establish trust with clients, banks need to educate them; show that bank clients are in control of their data; request the consent of the bank client for any data sharing or transaction triggered by the API; and create a smooth and convenient user experience for clients.

Tips for Developers and Businesses

Benefits for Developers and Businesses:

  • Advanced Product Offerings: Integrate financial data into applications and services, creating personalized capabilities (for example, budgeting tools, automated investment management).
  • Attract new customers: reach a wider audience looking for innovative financial solutions.
  • Reduced development time: Take advantage of predefined API functions, speeding up development.
  • Increased efficiency: automation of manual tasks, optimization of processes and reduction of operating costs.

Best Practices for Implementation:

  • Security First: Prioritize data protection and user privacy. Implement robust authentication, authorization, and encryption measures.
  • Choose Reliable Providers: Select compliant and reputable API providers with a proven track record in security and innovation.
  • Clear User Consent: Obtain explicit consent for data sharing, ensuring users understand how their data is used and protected.
  • Seamless Integration: Integrate APIs seamlessly into your existing infrastructure and user interface.
  • Comply with Regulations: Be familiar with and adhere to relevant Open Banking regulations and standards (e.g., PSD2 in Europe).

Choosing the Right API Provider:

  • API Functionality and Coverage: Ensure the provider offers the data and services you need for your specific use case.
  • Security and Compliance: Evaluate the provider’s security practices and regulatory adherence.
  • Developer Support: Assess the quality of documentation, tutorials, and technical support available.
  • Pricing and Fees: Choose a provider with a pricing model that aligns with your business needs and usage patterns.

Strategies for Monetizing Open Banking Services:

  • Subscription Model: Charge users a monthly or annual fee for access to your app or service.
  • Transaction-Based Fees: Charge fees based on the number or value of transactions initiated through your service.
  • Premium Features: Offer tiered plans with additional features for paying users.
  • Partnerships: Collaborate with other businesses to create combined offerings or reach new market segments.

Conclusion : Future of Open Banking API

There is an ongoing debate about competition between banks and financial technology companies, as the threat to traditional banking models is obvious. However, the advantages of cooperation between banks and third-party players outweigh the problems but traditional banks using open banking so the API can create new sources of income, while financial technology companies have access to the customer base and experience of banks. This gives banks the opportunity to excel in customer interface and relationship management. It is interesting to see how banks are adapting to the technological advances of open banking APIs.

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