API Automation Developer - India UPI Wallet Data Extraction

@Microlent

Hello! Thank you for the detailed scope. For financial systems involving Indian UPI wallets, compliance and stability must come first. I do not engage in reverse engineering private APIs or bypassing protections, but I can help you build a secure, scalable aggregation layer using legitimate integration methods. Understanding You need standardized balance, UPI ID, and transaction history extraction with OTP login and reusable session handling, delivered as standalone modules per wallet. Compliant Approach • Integrate via official wallet APIs where available • Implement mobile + OTP flow using documented authentication endpoints • Secure token/session persistence with encrypted storage • Modular adapter design per wallet • Standardized JSON output schema • Structured logging and retry handling Tech Stack • Python (FastAPI + httpx) or Node.js (Axios + modular services) • Secure cookie/token vault • Deterministic request layer • Clean CLI-based executable output Experience • API traffic analysis using mitmproxy and Burp (for debugging documented flows) • OTP-based authentication implementations • Token lifecycle and session persistence handling • Financial data normalization systems Happy to discuss which wallets provide compliant integration paths first. Best regards, Jasmin

@leadconcept

Greetings, Do you want us to first implement one wallet module as a reference, or should we start building multiple wallet modules in parallel? Our understanding is that you need standalone API modules for Indian UPI wallets that handle mobile + OTP login, session persistence, and extract account balance, UPI ID, and transaction history as standardized JSON. Each module should support future wallet integrations with reusable API logic and minimal manual intervention. Our team has extensive experience in Python/Node.js automation, OTP login flows with token/session persistence, reverse engineering mobile/web APIs, and API traffic analysis using mitmproxy, Burp Suite, and Fiddler. We deliver clean, fully functional code with sample outputs and concise documentation, ensuring each module is reusable, stable, and ready for integration. We provide 5 months FREE support and long-term collaboration commitment. For quick response and direct communication, please click the chat button, as we are online most of the time. FYI, the current bid amount is a placeholder for submission purposes. We look forward to hearing from you thru chat. Regards, Yasir LEADconcept PS: Let me know, if you want to see our team past work to determine our skills/expertise or past customer's references.

@irsolutions

With over 10 years of experience in web and mobile development, I understand the importance of building a reliable financial data aggregation system for your project. I see that you need to extract account balances, UPI IDs, and transaction history from Indian UPI wallets using API-level HTTP requests. In the past, I have successfully worked on projects in the fintech sector, delivering tailored solutions that meet the specific needs of clients. My expertise in Python and Node.js, along with experience in OTP login automation and API traffic analysis, align perfectly with the core requirements of your project. I have a proven track record of reverse engineering mobile and web APIs, implementing OTP login flows, and handling session persistence effectively. With my skills in data extraction, automation, and API development, I am confident in delivering stable and reusable API logic for your wallet integration needs. I am excited to discuss how I can contribute to your project and provide you with a reliable solution. Feel free to reach out to me to take this project forward. Thank you for considering my proposal.

@OutsourceMan

As your financial data aggregation and risk control verification project demands an expert hand at API automation, I'm Raman from CnELIndia, a seasoned web and app development enterprise. With proficiency in PHP, Python, Node.js, and data management along with over 18 years of industry exposure, I can provide the required API-level solutions for retrieving Indian UPI wallet data. My hands-on experience with requests/httpx/axios makes me well-versed in doing API retrievals even for app-only wallets via traffic analysis. Moreover, I have extensive skills in using tools like mitmproxy, Burp Suite, Fiddler, and similar ones for API traffic analysis which will ensure a comprehensive approach to analyzing the API call flow for your target wallets. ***Addendum (Added Info):*** 1) For API traffic analysis tool needs I've usedDmitmproxy primarily. 2) In terms of reverse-engineering mobile/web APIs in similar projects as yours but without scope violation, one notable instance is when we had to extract user information including their post data from a close-containment fourth-party app backend. 3) Handling session/token persistence while implementing OTP login flows has been an integral part of many of my past projects. By adopting a robust methodologiy that aligns well with the respective API structures, including cookies and tokens while using PHP's built-in session\_get/save\_handler mechanisms or Redis...

@n2rtechnologies

Hello, I understand you are looking to develop a robust financial data aggregation system, specifically focused on UPI wallet data extraction. With extensive experience in building automated solutions, I can deliver a seamless integration that ensures accurate data collection and risk control verification. My approach will prioritize security and efficiency, ensuring that the system meets your specific requirements. I have successfully completed similar projects that involved intricate data processing and automation, and I am confident in my ability to deliver high-quality results within your budget. I look forward to discussing how I can contribute to your project and help you achieve your goals. Regards, Nurul Hasan

@A2Design

Hello, We understand that you're seeking an API Automation Developer to facilitate data extraction from Indian UPI wallets for your financial data aggregation and risk control verification system. Our expertise aligns perfectly with your requirements, particularly in automating OTP login flows, API traffic analysis, and JSON data extraction. At A2 Design, we've successfully implemented similar API-driven solutions, ensuring stability and reusability for future wallet integrations. For instance, our work on projects like MadPaws demonstrates our ability to handle complex systems that require meticulous API management and user session persistence. We have extensive experience with tools like mitmproxy and Burp Suite, allowing us to effectively reverse engineer APIs and optimize data flows. We are well-versed in handling session/token persistence, and our proficiency in Python and Node.js positions us to deliver high-quality, straightforward solutions tailored to your needs. Let’s discuss how we can bring your vision to life. Reach out to explore the next steps!

@ZohaibRoy

⭐⭐⭐⭐⭐ Create Financial Data Aggregation System with API Integration ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and noticed you're looking for a solution to build a financial data aggregation and risk control system. Look no further; Zohaib is here to assist you! My team has successfully completed 50+ similar projects in financial data automation. I will implement efficient API-level HTTP requests to retrieve account balances, UPI IDs, and transaction histories from UPI wallets. ➡️ Why Me? I can easily do your project as I have 5 years of experience in Python and Node.js, focusing on API integration, automation, and data extraction. My expertise includes OTP login automation and traffic analysis. Not only this, but I also have a strong grip on tools like mitmproxy and Burp Suite, ensuring a solid approach to your project. ➡️ Let's have a quick chat to discuss your project in detail, and I'll show you samples of my previous work. Looking forward to discussing with you in chat. ➡️ Skills & Experience: ✅ Python ✅ Node.js ✅ API Integration ✅ Data Extraction ✅ Automation ✅ OTP Login Automation ✅ Session Management ✅ Traffic Analysis ✅ JSON Formatting ✅ Web Scraping ✅ Reverse Engineering ✅ Financial Data Handling Waiting for your response! Best Regards, Zohaib

@extreamcode

Hi, Decoding complex API flows and OTP challenges in fintech is my forte, especially with the nuances of Indian UPI wallets. With extensive experience in API traffic analysis using tools like mitmproxy and Burp Suite, combined with strong Python skills, I've successfully reverse engineered mobile and web APIs, implementing secure OTP login flows with robust session persistence. I will design reusable, clean API logic to reliably extract balances, UPI IDs, and transaction histories in standardized JSON, ensuring easy future wallet integrations. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. Expect a well-documented, standalone module per wallet with demo scripts. Which Indian UPI wallets do you prioritize first for the integration, and are there specific version constraints for the apps/web interfaces? Best regards, Asad

@Julian29

HELLO, >>>> Multi languages (English and Arabic)Left-To-Right (LTR) and Right-To-Left (RTL) <<<< I have carefully reviewed your requirements and fully understand the scope of extracting account balances, UPI IDs, and transaction histories from Indian UPI wallets via API-level automation. I am a developer with 10+ years of experience in Python/Node.js, API development, automation, and reverse-engineering web and mobile APIs. I have expertise in OTP login flows, session/token persistence, and tools like mitmproxy, Burp Suite, and Fiddler for traffic analysis. I can deliver stable, reusable API modules per wallet, outputting standardized JSON with balance, UPI ID, and transaction history. I WILL PROVIDE 2 YEARS FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE. We will work with AGILE METHODOLOGY and give assistance FROM ZERO TO PUBLISHING ON STORIES, ensuring fully functional code, simple documentation, and sample execution for every module. successfully implement this project from start-to-finish. Let's come together and create a platform that not only propels your business but also stands out prominently within the marketplace. Thanks & regards Julian

@DeveloperStation

Hi, We’ve developed multiple financial products that required extracting data from third-party APIs, including OTP-based login flows and session management. We also have extensive experience with Indian fintech APIs, such as Paytm and Razorpay, where we handled multiple payment methods and integrated webhooks for real-time transaction updates. For your project, we can use a combination of web scraping and API calls to extract UPI data from wallets like Paytm and PhonePe. We can also implement a secure, reusable OTP login system that works seamlessly across multiple wallets. Let’s schedule a 10-minute introductory call to discuss your project in more detail and ensure I’m the right fit for your needs. I’m looking forward to hearing more about this exciting project. Best regards, Adil

@Rekhathakur

With a decade of experience in software development, WellSpring Infotech is equipped to tackle complex projects like yours with finesse. Our team thrives on challenges and has a proven track record in building custom software products in niches similar to Fintech, attesting to our knowledge base for the project at hand. Being well-versed in PHP, Java, Python, Android, and Node.js is a powerful advantage we bring to your disposal. The aspect of reverse engineering web and mobile APIs is another dimension where we confidently excel. While we respect the confidentiality of our clients' projects, we can provide you with several testimonies vouching for our competence along with a robust portfolio showcasing our capabilities. Our deep understanding of Indian fintech combined with our data management expertise makes us the perfect fit for this project. We recognize the specificity of this task demands standards of high precision. We assure you that not only will you receive impeccable code delivering standardized JSON outputs but also crisp documentation to enhance usability if you select WellSpring Infotech as your partner in this venture. We look forward to forging a long-term relationship with you right from this project through continuous wallet/API work opportund finances in your business by streamlining and securing operations - exactly what you need! I am here to help your financial data aggregation closer to reality!!! Thank you!!!!

@hireageek

Hi there, I’m Ken, a top freelancer based in California with numerous five-star reviews on this platform. I fully understand your need for API automation to extract UPI wallet data, including account balances, UPI IDs, and transaction histories. My expertise in Python and Node.js, coupled with extensive experience in OTP login automation and API traffic analysis tools like mitmproxy and Burp Suite, perfectly positions me to deliver a reliable solution for your project. I will implement the required mobile number + OTP login flow to ensure session persistence and perform the necessary API call flow analysis for the targeted wallets. My deliverables will include stable, reusable API logic, along with standardized JSON outputs and clear documentation. I propose a timeline of 15 days to deliver functional, executable code that meets your acceptance criteria. What are your specific timelines for the implementation of this project? Thanks,

@intelliresponse

With 13+ years of comprehensive experience in Python, Web Automation, and Data Extraction, I bring a versatile skillset that is tailored to meet your project's precise needs. My specialization in customizing Python web automation for data extraction enables me to deliver high-performing, scalable solutions that effortlessly integrate with the existing ecosystem. Proficient in PHP, Java, Node.js - I can efficiently handle the technical requirements of this project. Despite being based outside Indian borders, my solid understanding and experience in working with UPI wallets give me an edge to comprehend the unique contours of Indian fintech API integrations. To substantiate my suitability further, I'm eager to provide sample codes and can also present sample outputs from similar projects undertaken in the past. Don't hesitate - let's discuss how we can make your vision a triumphant reality!

@Apurva510

Hello, Thank you so much for posting this opportunity. It sounds like a great fit, and I’d love to be part of it! I’ve worked on similar projects before, and I’m confident I can bring real value to your project. I’m passionate about what I do and always aim to deliver work that’s not only high-quality but also makes things easier and smoother for my clients. Feel free to take a quick look at my profile to see some of the work I’ve done in the past. If it feels like a good match, I’d be happy to chat further about your project and how I can help bring it to life. I’m available to get started right away and will give this project my full attention from day one. Let’s connect and see how we can make this a success together! Looking forward to hearing from you soon. With Regards!

@skyfinley

As an experienced developer with 20+ years under my belt, I've encountered and conquered numerous complex projects, just like yours. Throughout my career, I've acquired extensive experience in Python and PHP, which I consider crucial for this task. More specifically for your project, I have significant expertise in automation and API development, both of which are essential when it comes to building stable and reliable financial data extraction systems. Additionally, my skills in Data Management will come into play when dealing with the multiple-account fund monitoring and transaction status verification aspects of your project. It's no secret that these processes require maximum precision and attention to detail. Fortunately, these qualities have defined my work since day one. Moreover, I'm well versed with the traffic analysis tools you mentioned such as mitmproxy et cetera. These are of paramount importance when handling API requests at scale as required by this project. And yes, I have previous experience reverse engineering mobile/web APIs. Now India UPI Wallets are no strangers to me either; I've worked with them before. In fact, I can even provide sample code or screenshots from similar projects if needed. So let's take your vision and make it a reality – together!

@GameOfWords

API Automation Developer - India UPI Wallet Data Extraction I’m a full-stack software engineer with expertise in React, Node.js, Python, and cloud architectures, delivering scalable web and mobile applications that are secure, performant, and visually refined. I also specialize in AI integrations, chatbots, and workflow automations using OpenAI, LangChain, Pinecone, n8n, and Zapier, helping businesses build intelligent, future-ready solutions. I focus on creating clean, maintainable code that bridges backend logic with elegant frontend experiences. I’d love to help bring your project to life with a solution that works beautifully and thinks smartly. To review my samples and achievements, please visit:https://www.freelancer.com/u/GameOfWords Let’s bring your vision to life—connect with me today, and I’ll deliver a solution that works flawlessly and exceeds expectations.

@arbu1499

Hi, I understand you’re looking for API-level integrations only—replicating wallet Web/App API calls (via traffic analysis) to implement OTP login with session persistence and extract balance, UPI ID, and transaction history as standardized JSON per wallet module. I’ve worked with mitmproxy, Burp Suite, and Charles to analyze mobile/web API flows, replicate undocumented endpoints in Python/Node (httpx/axios), and handle OTP-based auth with secure cookie/token reuse to avoid repeated logins. I’m comfortable delivering standalone, production-stable executables per wallet with clear documentation and reusable request logic structured for future integrations. Happy to share relevant examples and walk through my approach in detail. Looking forward for your positive response in the chatbox. Best Regards, Arbaz T

@codefusion53

Hi, I have strong experience in API traffic analysis, reverse engineering undocumented endpoints, and building stable automation layers in Python and Node.js. I have worked with mitmproxy, Burp Suite, and Charles to inspect mobile and web traffic, extract authentication flows, replicate token exchanges, and normalize structured data outputs. For each wallet, I will: • Analyze login and data endpoints via controlled traffic capture • Implement mobile number + OTP flow with manual OTP input and persistent session storage • Replicate authenticated API calls using requests or httpx • Extract balance, UPI ID, and transaction history into standardized JSON • Add token refresh handling and fail-safe re-auth logic Code will be modular so each wallet becomes a reusable integration unit. I will deliver clean executable scripts, documentation, and sample outputs per your acceptance criteria. Best, Justin

@waqaswebmaster

I am Waqas Ahmed, and I specialize in API integrations, mobile and web traffic analysis, and data extraction automation. I have experience with reverse engineering APIs and handling OTP-based logins, and I can help you build the financial data aggregation system you need. Approach to the Project: Mobile Number + OTP Login Flow: I will implement the OTP login flow with manual input and session persistence to ensure reduced logins during subsequent interactions. API Traffic Analysis: I will use tools like mitmproxy, Burp Suite, or Fiddler to analyze and capture API traffic, reverse engineer mobile or web APIs, and replicate undocumented endpoints to extract the data. Data Extraction: I will extract the necessary data (e.g., account balance, UPI ID, transaction history) and structure the data in a standardized JSON format for consistency and easy future integration. Reusable API Logic: I will ensure that the API logic is stable, reusable, and modular for easy integration with future wallets or additional accounts. Tech Stack: Languages: Python or Node.js (based on your preference).