[DMP 2025]: AI-Powered Middleware for ONDC/OCEN API Compliance

[tanishk2907]

Ticket Contents

Description

BFSI institutions face friction in aligning internal APIs with ONDC/OCEN due to complex specs and high technical effort. This slows rollout of inclusive financial services. HarborLink aims to bridge this gap by using GenAI to auto-generate middleware, converting bank APIs into compliant standards. It enables faster onboarding of banks, reducing both time and resource costs.

Goals & Mid-Point Milestone

Goals

• Build a parser to ingest OpenAPI/Swagger API specs from banks
• Use GenAI to map/transform API formats to ONDC/OCEN middleware structure
• Create a lightweight CLI or web interface for previewing and testing generated middleware
• Containerize middleware and build sample plug-and-play deployment
• Mid-point milestone: Demo integration of one BFSI API with ONDC using HarborLink

Setup/Installation

• Python/Node.js environment
• Deployment and database: Docker & Postgres
• OpenAI API key or GenAI backend
• Sample OpenAPI specs from mock BFSI systems

Expected Outcome

1. HarborLink tool that accepts an input API spec and outputs ONDC/OCEN-compliant middleware

2. CLI or basic UI for BFSI teams to upload/test their APIs

3. Sample container deployment for quick BFSI sandbox testing

4. One-click integration starter pack for banks

Acceptance Criteria

1. GenAI reliably converts at least 3 different BFSI APIs

2. Middleware passes validation against ONDC/OCEN schemas

3. Middleware is deployable in sandbox and tested with dummy data

4. CLI/UI enables error-free upload, preview, and deployment

Implementation Details

Use LLM (e.g., GPT-4) to parse and generate middleware mapping rules

API format: OpenAPI 3.0

Middleware logic using FastAPI/Express.js

Store config and transformations in a DB for traceability

Optional schema validation with JSON Schema libraries

Mockups/Wireframes

To be added if UI is developed – optional CLI or Swagger-based uploader

Product Name

Harborlink

Organisation Name

Sampatti Card

Domain

Fintech

Tech Skills Needed

Python, Node.js, API integration, Docker, OpenAPI, LLMs

Mentor(s)

TBD

Category

Accessibility

[mohan-bee]

@tanishk2907 I would like to take up this issue !

[PuneetJadoun]

Hello @tanishk2907 I would like to contribute to This Project as I am familiar with Nodejs , Python , API integration as well .

[rohit220604]

Hi @tanishk2907 ,

I’m Rohit Jaliminchi, and I’m really interested in contributing to the HarborLink project under C4GT.

I have experience working with Python, RESTful APIs, and Docker, and I’m familiar with OpenAPI specifications. I’m excited about the project’s goal of simplifying BFSI API integration using GenAI and middleware automation. I’m confident I can contribute to building the CLI/UI tools and containerized deployment workflows, and I’m eager to learn more about ONDC/OCEN standards through this project.

Looking forward to collaborating and contributing to HarborLink!

Thanks,
Rohit Jaliminchi
GitHub: @rohit220604

[Vaibhaav-Tiwari]

hey @tanishk2907
i have prior experience with APIs as well as Docker as well as I'm really adaptive
do let me know if there is any slack or matrix channel where we can communicate further

[YASH-YADAV-dynamo]

heya @tanishk2907
I’ve previously worked with ONDC internal APIs and had conversations with the OCEN team (though they haven't been very active lately). If there's a chance to re-engage with them, I’d love to contribute.

I’ve worked on a FinTech startup using similar tech (including R3 Corda private ledgers) — GitHub: Kubar-Protocol. I'm comfortable with APIs, private data handling, OCEN, OpenAPI, Swagger, Node.js, Docker, LLMs, and middleware automation.

This project really excites me, and I’d be happy to contribute if I fit the bill. Please feel free to share any community links or assign tasks.

Some of my POW .
Showing I have worked in FinTech, with LLMs, and full-stack projects involving a lot of API's and research.

Thanks,
Yash
github

[Rishikesh63]

@tanishk2907 i have to submit only proposal for this ?

[shikjazz]

Hi @tanishk2907 ,

I’m Shikhar Sharma, and I’m really interested in contributing to the HarborLink project under C4GT.

I have experience working with Python, RESTful APIs, and Docker, and I’m familiar with OpenAPI specifications. I’m excited about the project’s goal of simplifying BFSI API integration using GenAI and middleware automation. I’m confident I can contribute to building the CLI/UI tools and containerized deployment workflows, and I’m eager to learn more about ONDC/OCEN standards through this project.

Looking forward to collaborating and contributing to HarborLink!

Thanks
GitHub: @shikjazz

[riskmr3275]

Subject: Interest in Contributing to HarborLink – C4GT

Hi Tanishk,

I hope you're doing well!

I'm Risu Gupta, and I’m writing to express my interest in contributing to the HarborLink project under C4GT. I’m genuinely excited about the project’s goal of streamlining BFSI API integration with ONDC/OCEN standards using GenAI-driven middleware.

With a strong foundation in JavaScript, Node.js, Express.js, and React.js, and experience working with RESTful APIs, Docker, and OpenAPI specifications, I believe I can meaningfully contribute to the project. I'm comfortable building CLI tools, lightweight UIs, and setting up containerized deployment workflows. I also have working knowledge of AI and Large Language Models (LLMs), which aligns well with HarborLink’s use of GenAI for transforming and mapping APIs.

Please let me know how I can get started or if there are any contribution guidelines I should follow. I’m looking forward to working with the team!

Warm regards,
Risu Gupta
GitHub: @riskmr3275

[purnasheker]

I am ready GitHub: @purnasheker

[botwithlag]

I would love to work on this issue

[n14rishitha]

Hello @tanishk2907 @VedantKhairnar,

I'd like to Contribute to the HarborLink project, namely on:

-Parsing OpenAPI/Swagger specs from BFSI institutions.

-Applying the GenAI-driven middleware converter (based on GPT-4/alternative) to convert APIs into ONDC/OCEN-compliant variants.

-Creating the CLI/web interface for testing and deployment.

-I am familiar with FastAPI/Express.js, OpenAPI specs, and GenAI integrations, and I can work towards the objective of minimizing technical frictions for BFSI partners.

Can you give this task to me? I'll make sure the middleware is in validation criteria and offer a demo integration as the mid-point milestone.

[me-tusharchandra]

Hi @tanishk2907, just wanted to confirm, map/transform API formats can be done using traditional methods. What is the main use case of Genai in this project? I understood the rest of the workflow just confused in this. Thanks!

[tubakhxn]

Hi @tanishk2907 @VedantKhairnar ,
This project really excites me! With my background in full-stack development, experience with API integration, and growing expertise in GenAI applications, I believe I can contribute effectively to HarborLink. Recently, I built an LLM-powered learning assistant called EduBot that demonstrates my skills in combining frontend/backend systems with intelligent guidance logic. I've also explored OpenAPI specs and containerized deployments in academic and side projects.

I’m passionate about impactful fintech solutions and am confident I can help design the GenAI-based middleware logic, build a clean CLI/UX for API uploads, and ensure smooth Dockerized deployment.

GitHub:@tubakhxn
Portfolio: https://tubakhan.vercel.app/

Looking forward to contributing to this innovative project! 🚀

[DigvijaysinhChudasamaIITM]

Hello @tanishk2907 and Sampatti Card team,

This project immediately caught my attention as it sits at the intersection of two areas I’m highly skilled and passionate about: API automation and GenAI applications. With hands-on experience in building and deploying robust backend systems using Python (FastAPI) and Node.js (Express.js), I’ve worked extensively with OpenAPI/Swagger specs, designing and consuming APIs for both internal microservices and external integrations.

In my recent roles, I’ve also containerized full-stack applications using Docker, implemented PostgreSQL for traceable config storage, and developed middleware solutions that support data transformations and validation pipelines. I’ve actively explored LLMs and prompt engineering, and I’m excited by the potential of GenAI to abstract complex API mapping and reduce onboarding time for financial institutions.

Given my background and problem-solving approach, I believe I could bring both technical proficiency and innovation to HarborLink. I'd love the opportunity to contribute and iterate toward a reliable, developer-friendly tool that makes inclusive fintech services more accessible. Looking forward to your consideration and feedback!

Warm regards,
Digvijaysinh Chudasama