Fintech API Integration Services

Nimble AppGenie offers fintech API integration services for startups, mid-size companies, and enterprise-level services. We cover 25+ payment, KYC, crypto, and card APIs integrated into your product. We perform it with no broken connections, no downtime, and offering full compliance, which is a part of our end-to-end fintech software development services.

Trusted By Fintech Leaders Worldwide

Our company is trusted by the leading fintech leaders worldwide. These people have trusted us with their resources, and we proved them right. Here is the list of top leaders:

Why Does Your Fintech Product Need the Right API Stack?

Your fintech products need the right API stack to serve as a bridge between your platform, banking partners, data providers, and payment processors.

The modern fintech products are built on APIs. In the current era, no company creates everything from scratch. With the right API stack, you can determine how fast you launch and how compliant you are in this competitive market. The success of your app does depend on the API stack powering its ecosystem. Through a well-designed API stack, you should accelerate development, reduce the overall operational complexity, and enhance the user experience.

By choosing the right API stack, fintech companies can enhance scalability, strengthen security, and quickly adapt to the changing market demands. Nimble AppGenie, a top fintech API integration service, integrates 25+ fintech APIs across payments, KYC, crypto, and card issuance. Here, we handle the complete process from selection, sandbox, testing, production deployment, and even the ongoing maintenance.

Why Does Your Fintech Product Need the Right API Stack?

API Categories We Integrate

Our team integrates third-party API for fintech, and we facilitate seamless, secure money transfers and transaction handling. Here are the categories of fintech APIs we integrate:

Payment APIs

Our experts select a layered payment infrastructure to provide you with 25+ payment API integrations, including Stripe, PayPal, Adyen, Braintree, Razorpay, PayU, Paytm, and many more.

KYC & Identity APIs

As the leading fintech API integration services, we enable KYC and identity APIs, helping businesses to ensure that the user is genuine. This assists you in automating the process of verifying customers’ identity by ensuring compliance and using the latest technologies.

Crypto APIs

We act as a middleman that wraps the complex blockchain data into easy-to-use software tools. Our team creates a backend infrastructure to integrate existing wholesale APIs and monetize complete access.

Card Issuance APIs

Nimble AppGenie offers card issuance APIs integration that allows businesses to securely create, manage, and to distribute the physical or virtual payment cards. This helps the businesses to issue physical or virtual cards directly from their own systems.

All Integrations

We are the leading fintech APIs integration Service Provider, offering all types of integrations. Here is a grid representing all the integrations.

PAYMENT APIs

Stripe
PayPal
Visa
Flutterwave
Paystack
M-Pesa
Apple Pay
Venmo
Cash App
OnAfriq
Lean Bank
GIMAC
Ozow EFT

KYC API integration

Sumsub
Uqudo
Trulioo
Persona
Smile ID

CRYPTO APIs

Coinbase
Binance
CoinDCX
Quidax

CARD ISSUANCE

Visa Card Issuance
Mastercard Card Issuance

Our API Integration Process

As a top fintech app development company, we discover your app, identify the prospective errors in your system, understand your requirements, and then proceed with the complete API integration procedure. Here’s a step-wise process that we opt for:

Discovery and API Selection

We understand your project requirements after viewing and analyzing your requirements. Next, we discover the different types of APIs your app or platform requires. We select the right API stack for your platform and discuss it with you.

Sandbox Setup & Initial Integration

Our team first sets up a sandbox for your app or platform, which helps to have an isolated and simulated environment to build, test, and debug the code safely without affecting the live systems or real data. Thus, we’ll not impact the live app interface and its functionality.

End-to-End Testing

In this step, we perform a thorough test for every API that we include in your app. It helps us to minimize and eliminate bugs while building an API for your platform. With thorough testing, we ensure that your user experience has impactful functionality.

Webhook & Event Configuration

Here, we establish an automated, real-time communication between two systems. Here, three primary configurations were established, including event triggers, payload structures, and reliable delivery & security protocols. Then we build a complete integration for your app.

Live Deployment

After building, we deploy the API in the live app and platform. We deploy the API to production with monitoring it actively. Here, we confirm that all live transactions do process correctly before finally handling it to your team.

Documentation & Handover

This is the last stage, where we hand over the app after API integration in mobile app, and full integration documentation was provided. Additionally, after the handover, your team can maintain and extend the integration independently.

Fintech API Integrations Starting at $8,000

Connect payments, banking, KYC, compliance, and more with secure, scalable integrations tailored to your business.

Which APIs Does Your Product Need?

If you are developing a fintech app, whether it's an eWallet app, Neobank app, crypto wallet app, remittance app, or payment platform, we integrate the diversified types of APIs based on your requirements. Here’s what we do as a top fintech API integration services:

eWallet App

For eWallet app development, you will require APIs such as Stripe, PayPal, Apple Pay, Google Pay, M-Pesa, Airtel Money, and Sumsub.

Neobank App

For Neobank app development, we integrate APIs such as Visa Card Issuance, Mastercard, Lean Bank, Sumsub, and Trulioo.

Crypto Wallet

For crypto wallet development, you need to integrate the APIs such as Coinbase, Binance, Quidax, and SumSub.

Payment Platforms

For the payment platforms integrations, we opt for Stripe, PayPal, Visa, Google Pay, and Apple Pay.

Remittance App

You can create a remittance app by opting for integrations such as Flutterwave, OnAfriq, M-Pesa, Airtel Money, Paystack, and Smile ID.

African Fintech App

In the case of the African fintech app, we offer Flutterwave, Paystack, M-Pesa, and OnAfriq. Along with this, you can integrate GIMAC, Airtel Money, Smile ID, and Ozow EFT.

Compliant API Integration — Every Time

Every API integration we deliver is built to the compliance standards that your product operates under. Here, security is built into the integration architecture. As a fintech API integration service, we build security into the integration architecture, and we do not add it afterwards. In every fintech app, we offer compliant-ready API integrations. Here are the standards we cover:

Payment Security

PCI-DSS Level 1, 3D Secure 2 (3DS2), Card Tokenisation

Data Privacy

GDPR (EU/UK), CCPA (US)

Identity & Financial Crime

KYC, AML, VASP Compliance

Regional Regulations

FCA (UK), CBUAE (UAE), RBI (India), BEAC, BCEAO, SAMA (Saudi Arabia)

Fintech API Integration Projects We Have Delivered

If you are still confused about connecting with us for fintech API integration, here are our case studies to go through:

Currency Converter- for Foreign Bank

Problem:

Faced issues related to rate discrepancies
High API latency
Hidden conversion markups
Handling refunds in different currencies

The Stack

Backend framework: Node.js with Express or Python with Flask
Frontend: built with React and styled with Tailwind CSS.
Live exchange rate provider: Integrates with services like exchange rate via HTTP requests.
Hosting: Deployed on platforms like Render or Vercel

Result

The users were willing to exchange their currencies smoothly via our system.
The platform integrated caching to skip redundant processing and offered code-level enhancements, resulting in high processing speed.
Through a scalable architecture, the platform was able to handle thousands of queries.
The refunds were handled smoothly, allowing users an interactive experience.

Multi-API African Wallet — Swap Africa

Problem

Navigating high fragmentation
Complex FX regulations
Interoperability bottlenecks
Fluctuating network reliability

The Stack

Frameworks: Flutter or React Native
Backend Layer: Node.js, Python, and Go (Golang)
Databases: MongoDB, PostgreSQL
KYC/AML Providers: Jumio, Onfido, Smile Identity

Result

We built a connected panel that allowed different programs, databases, and systems to communicate seamlessly.
Our team built an automated compliance software, utilizing cross-border payment platforms, enforcing strict internal FX risk policies.
For the interoperability, we built a middleman software, and fixed data from the start.
Through progressive sync and queuing, and local data caching, the fluctuation issue was resolved.

Neobank API Stack — UAE Neobank

An app where users can find multiple draft platforms to play and engage with the top players.

Problem

Regulatory compliance issues
Cybersecurity risks
Customer acquisition and retention

The Stack

Used tools like VComply, Comp AI, and Secfix
SIEM and EDR tools for cybersecurity
Used tools like CRM, CDP, and privacy-first marketing

Result

Through identifying the compliance regulations for the particular regions, the regulatory compliance issues were resolved.
Adopting the secured and encrypted network helped us to ensure cybersecurity.
Through an integrated user interface, the platform was able to retain target users.

Why Choose Nimble AppGenie for API Integration?

There are many reasons to choose Nimble AppGenie for API integration, such as being already integrated in production, offering compliance-ready solutions, with compliance and security integration, and with post-integration support. Here’s why you need to choose Nimble AppGenie:

Offers Simple & Direct Philosophy

Without trial and error, we have already integrated 26 APIs in live fintech products. With the edge cases already solved. We offer client-centric solutions, focus on cutting development time, and ensure seamless integrations.

Proven Track Record

Nimble AppGenie has 8+ years of experience deploying secure, cloud-ready architectures and complex 3rd-party integrations. The company has expertise in building and integrating both standard REST and complex GraphQL APIs.

Compliance-Ready from Day One

The company builds every integration to meet PCI-DSS, GDPR, and market-specific regulatory requirements. Nimble AppGenie integrates regulatory frameworks directly into the architecture, rather than adding security as an afterthought.

Offers a lifecycle from Sandbox to Production

Nimble AppGenie, as the best fintech API integration service, offers a transition from the sandbox to production. Here, we begin the lifecycle from the discovery phase, sandbox testing, sprint releases, and live deployment. All the experts are handled successfully by the experts.

African & MENA API Specialists

Our team offers services for African & MENA companies. We cover it all from Flutterwave, Paystack, M-Pesa, GIMAC, OnAfriq, Airtel Money, Ozow, Lean Bank, Uqudo, Smile ID, and API integration. No other company covers all types of API integrations.

Provides Multi-API Projects

Most of the products require 5-10 APIs that are integrated simultaneously. Our team scopes, prioritises, and delivers the complete full-stack solution. Here we create an architecture that supports multiple internal APIs.

Offers Post-Integration Support

Nimble AppGenie offers post-integration support; we even offer services related to API change and updating their SDKs. Additionally, we maintain integrations after go-live, so your products keep working as the providers evolve.

Why Choose Nimble AppGenie for Neobank Development?

Build Payroll Software That Grows With You

From automation to compliance, we create solutions for modern businesses. Secure, scalable, and tailored to your needs.

Frequently Asked Question?

The fintech API integration services act as a digital bridge that enables different financial software systems and applications to share and communicate successfully with other apps. These services fill the gap through an app and via digital connection.

You can connect with the top fintech API integration service providers who will help you in the complete integration process through discovery, selecting the right API stack, using a sandbox, building the complete API, deployment, and then launching the updated version

We offer Sumsub, Trulioo, Veriff, Onfido, and Jumio. We help businesses to integrate KYC in their fintech app by connecting with the leading providers.

Yes, we are the leading fintech API integration service provider that integrates blockchain-based payment systems. This is highly feasible and highly effective for fast and global transactions. We can help you to achieve it via established payment processors and enterprise banking APIs.

Yes, you can issue virtual payment cards via API integrations, and you can manage and distribute virtual payment cards directly from your own systems using programmable APIs. This will help you to resolve the users’ challenges related to payment cards.

Yes, Nimble AppGenie does offer post-integration support and maintenance. We do not leave you just after integrating the APIs; we further support it as per the leading and trending technologies evolve.

For a fintech API integration project, it might take 3 weeks to 5 months, depending on the complexity of your platform, the skills of the developers, and the number of APIs you want to integrate.

Yes, you can get a quote for your fintech API integration simply by filling out the form, and our team will connect with you within 24 to 36 hours after evaluating your requirements and examining the types of APIs that can be integrated for further development.

Success stories Client Testimonials

Nimble AppGenie is committed to delivering results that satisfy our client’s needs and their business objectives. Here are testimonials from our clients about their experiences of working with us.

Exceptional service tailored to our unique business needs. The team’s expertise brought my idea to life, making to process seamless. Their dedication to quality is commendable. Highly recommended for their professionalism and results.

Uri. S

(Managing Director of Xparking, USA)

“Nimble AppGenie delivered a standout website that has attracted significant traffic. Their collaborative and organized approach made the development process smooth. Their expertise shines in the end product, making them the go-to web development company in London.

Francis Ejiegbu

(CEO of StepbyStepFitness, UK)

We hired Nimble AppGenie for web development services related to our edtech platform, Glu Learning. They integrated well with our team to solve all the problems and deliver remarkable solutions. Their team have great command of both client side and server side technology. We highly appreciate and recommend their services.

Ryan Williams

(CEO of GLU Learning, United Arab Emirates)

"Our journey with Nimble AppGenie is defined by their consistent availability, reliability, and efficiency. As we look towards expansion, I'm confident our partnership will grow even stronger. And we are eagerly anticipating the next chapter with them.

Dr. Christian Herbert Ayiku

(CEO of DafriBank, South Africa)

For the last year, we have been working closely with the Nimble team to develop our app. Nimble has provided consistent customer care, good communication, solutions to issues, and an end product that we're all really happy with.