API Integrations for Fintech: How Do They Work?

Bozhena Hryvnyak

Bozhena Hryvnyak

March 9, 2023

Ever wondered how other financial apps do it ALL

From managing bank accounts to applying for loans! These apps provide a one-stop shop for all your financial needs. It’s like having a personal financial advisor at your fingertips! 

But have you ever wondered how they make it happen?

Behind this lies a secret – APIs (Application Programming Interfaces). That’s what makes these apps so powerful.

And you can use them for your convenience, too! But actually, the benefits of APIs go beyond just convenience.

Give a more seamless experience = attract more users = increase engagement with your app or website. That’s how it works!

If you’re curious about the magic behind those all-in-one financial apps, then you’re in the right place. Here we discuss the power of APIs in fintech and beyond, common API integrations, when you need them, and how to implement them.

Let’s go!


What is an API integration?

First things first: an API, or Application Programming Interface, allows different software systems to communicate and interact. 

They’re vital for fintech, giving companies access to vast amounts of financial data and services. With APIs, a fintech company can be a service provider of everything from account aggregation to fraud detection and much more!

APIs are like servers in a restaurant. They help software programs ask for things from other systems and get a response back, just like how customers tell servers what they want to order.

In the same way, APIs allow different third-party apps and websites to talk to each other and share information in a structured and secure manner. They’re like bridges between different systems, enabling you to use your favorite app to order food from a restaurant. 

api in restaurant - process explained

In the case of fintech, APIs are particularly important because they allow those all-in-one financial apps to access and share data from various sources. 

For example, an app that helps you manage your investments might use an API for fintech to access data from different stock exchanges or financial news sites.

Another example of its use is to access your bank account for any financial service (like using your credit card) right from your phone. 

APIs are enabling banks, financial institutions, and fintech startups to share their services and data with other companies. Open banking APIs are at the forefront of this trend, allowing third-party providers to access your bank account information.

So if you’ve ever wondered how your favorite financial apps play so nicely together, now you know – it’s all thanks to APIs!

What are the most common API integrations?

As we mentioned, fintech API integrations can help you connect different systems and enable seamless data transfer, creating new opportunities for growth and innovation. 

That’s how you stay ahead of the competition and better serve your customers!

With that, let’s talk about the ultimate fintech power-up moves. 

Here are some common types of APIs that can take your product and its functionality to the next level:

Banking APIs

It’s one of the most common types of API, and it’s well-deserved! 

Banking APIs allow apps to access information from user’s bank accounts, such as transaction data and account balances. For example, you can easily collaborate with a bank or financial institution.

That’s how bank integration API can make your apps offer services such as real-time access to your account and money transfers.

Payment APIs

That’s what you call the magic behind those apps that let you pay and transfer money between accounts

By using payment APIs, developers can create apps that make it a breeze to handle all your transactions without ever leaving the app. 

Say goodbye to paper receipts and hello to secure transactions with the help of payment processors, such as Stripe, PayPal, Square, and others.

Credit bureaus

By using credit APIs, developers can create apps that help you improve your credit score, manage your debts, and more. It’s like having a personal finance coach in your pocket! 

For example, there are API integrations for fintech with Experian, Equifax, and TransUnion for loan underwriting and risk assessment.

Identity verification

Next time you log into some of the financial apps and it asks you to verify your identity, you can thank APIs for keeping your information safe and secure

These APIs use a variety of methods to verify a person’s identity, such as analyzing their government-issued ID, checking their biometric data (like their fingerprints), and more. 

That’s how developers can create apps that help prevent identity fraud and make sure that only authorized users have access to sensitive financial information.

For example, such identity verification providers are Jumio, Onfido, or Experian. These fintech API integrations can help with identity verification and fraud detection.

Data analytics and reporting

These APIs allow data collection from various sources.

The collected data is then analyzed to identify patterns, trends, and other important insights. This process helps companies make better financial decisions, improve their services, and more.

Google Analytics, Mixpanel, and Tableau are the APIs that can help you analyze user data and track business model performance.


In the world of fintech, building strong relationships with customers is key to success. That’s where CRM (Customer Relationship Management) APIs come in. 

These powerful tools are crucial for financial companies to manage and maintain strong relationships with their customers while also improving efficiency and productivity. 

For example, companies can access and store customer data such as contact information, transaction history, and preferences. This data can then be used to provide more personalized services to customers, improve customer satisfaction, and even predict customer behavior.

Salesforce, Zoho, and Hubspot are customer relationship management (CRM) tools that can improve customer satisfaction and help you efficiently build and manage relationships.


When it comes to fintech, blockchain APIs are game-changers. 

Blockchain technology allows for secure and transparent transactions, making it an ideal tool for financial companies. With blockchain APIs, companies can leverage the power of this technology to build secure and efficient financial applications.

For example, it is possible to access decentralized data and perform transactions with Ethereum, Bitcoin, or Hyperledger.

SMS and Email services

A total must-have for companies that want to communicate with their customers in a timely and effective manner. With these APIs, it’s possible to send automated notifications, alerts, and updates to customers via SMS or email.

For example, a bank can use SMS and email services APIs to send real-time alerts to customers regarding their account balances, transactions, and payment due dates. This ensures that customers are always aware of their financial status and can take action when needed.

Say “hello” to such APIs as Twilio and Sendgrid for sending notifications and alerts to customers.

Benefits of API integrations for fintech products

API integration is one of the key drivers of innovation in the fintech industry, and for good reason! 

Integrating APIs into fintech products has many benefits that can help companies stay ahead of the competition and provide a better customer experience.

Here are some key benefits, according to a recent study by Cloud Elements:

  • Boost Business Strategy: 55% of the respondents said that API integration is critical to their business strategy;
  • Increase Customer Satisfaction: 60% believe API integration will significantly impact customer upgrades or renewals;
  • Expand Partnership Opportunities: 62% aim to become a platform provider to integrate with partners, maintain customer stickiness, and/or find new revenue opportunities;
  • Versatile Uses: APIs are used for various purposes, such as building B2B products (55%), mobile products (36%), B2C/consumer products (29%), employee productivity (26%), and IoT applications (22%);
  • Monetize Your APIs: 56% charge for API access or integration services, creating new revenue streams for your business.

By embracing the power of API integration, businesses can enhance their digital strategy, drive customer loyalty and increase revenue opportunities. 

Sounds like a magic wand in the fintech industry world!

Challenges in API integrations for fintech products

Whether it’s a mobile banking app or a payment solution product – API integration may become a complex process.


api integrations challenges
  • Security: You don’t want anyone getting their hands on sensitive financial data, so it’s important to ensure that the API provider has robust security measures in place. Otherwise, you might be in for a world of trouble.
  • Compliance: Regulations like GDPR and PSD2 might damage your fun, but they’re critical to follow. 
  • Scalability: Can your API integration handle the growth if your fintech app or product takes off? Make sure it can scale up to meet the demand, or you’ll be in a tough spot.
  • Integration: Integrating APIs can be challenging, especially if the API provider uses a different technology stack. It’s like a puzzle that you have to fit together perfectly.
  • Data management: You want to avoid getting swamped by data, so make sure your API integration doesn’t add to the chaos. Keep your data organized and under control, or you’ll be up the creek without a paddle.
  • Dependency: Once you integrate an API, you’re in it for the long haul. If your provider has issues, you might find yourself in hot water.
  • Quality: If your API provider is less than stellar, your fintech app or product won’t be very appealing. Test the API thoroughly to make sure it’s up to snuff.

When do you need to integrate?

Picture this: you’re running online banking services with all the bells and whistles – customers can open accounts, make transactions, and manage their finances online. 

But there’s one thing missing – credit scores and reports. So, you decide to integrate an API from a credit rating agency.

However, there are a few issues you need to keep in mind:

  1. For starters, the credit rating agency has a different tech stack than you, so integrating the API will require some serious development know-how and resources. If not done properly, it could set you back big time or even cause the project to flop entirely.
  2. To make matters worse, the credit rating agency’s API is only available in a specific data format, so you’ll have to convert it to work with your platform. This process can be complicated and time-consuming and increases the risk of errors creeping in.
  3. And just when you thought it couldn’t get any trickier, the credit rating agency regularly updates its API. If you don’t keep up with these updates, it could impact your platform’s finance integration and overall performance. Maintaining the integration requires extra resources and effort to keep things running smoothly.

The finance integration process can be a bit of a headache for fintech companies, as it requires a significant amount of development resources and expertise. And let’s face it, nobody wants to deal with added complexity, right? 

But that being said, the benefits of API integration can make it well worth the effort.

How to face API integrations?

Have you ever tried to juggle multiple tasks at once and ended up feeling overwhelmed and frazzled? 

The API integration can feel like that, too. 

That’s why we’re here to help you make it as smooth and stress-free as possible. Our team is made up of experts with the necessary technical and development skills to handle the integration process.

One of our recent projects was an award-winning investment platform that needed integration with various third-party accounting solutions and financial APIs for business health monitoring and built-in analytics.

Here’s how our dedicated team helps with API integration:

  • Project Management: Our team has experienced project managers who will oversee the integration project from start to finish. Planning, scheduling, and coordinating the work of the team ensures fast time to market and that the development cost is within budget.
  • Technical Expertise: A team of experts with the necessary technical expertise handles the integration process perfectly. This includes developers, systems architects, and security experts who will ensure that the integration is done correctly and efficiently.
  • Testing: The importance of testing in the integration process can not be underrated! That’s why we have a team of experts who will test the API and ensure that it meets the requirements and expectations.

We know that integrating API for fintech can be a daunting task, which is why we’re committed to making the process as simple and efficient as possible.

Whether you’re looking to add payment processing or data analytics to your platform, we’ve got you covered. Reach out to make your API integration a success!

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