🚀 FastAPI-Integrations-Hub: Zoho APIs, SSO, WorkDrive, RAG & Chatbot

This project demonstrates a scalable, modular integration hub using Python FastAPI, designed to seamlessly incorporate multiple advanced features like Zoho Single Sign-On (SSO) (OAuth 2.0 & OpenID Connect), Zoho WorkDrive APIs, RAG (Retrieval-Augmented Generation), chatbot integrations, and future enterprise APIs — all under one unified architecture.

✅ Refactored using FastAPI routers for clean, maintainable, and scalable code — perfect for continuously evolving multi-feature use cases!

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💡 Features

• ✅ Login with Zoho SSO (OAuth 2.0 + OpenID Connect)
• 🔑 Decode id_token (JWT) to extract user profile info (name, email, Zoho User ID)
• 🗂️ Access personal WorkDrive folders (My Folders)
• 👥 Access team folders (Team Folders)
• 🧠 Future support for RAG (retrieval-augmented generation) modules
• 🤖 Extendable chatbot integrations (LLMs, agent-based bots, etc.)
• 💼 Maintain user sessions with FastAPI (in-memory or future scalable storage)
• 🧩 Highly modular router-based structure for adding any number of APIs cleanly

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🗂️ Project Structure

your_project/
├── main.py               # Main FastAPI app entry point
├── config.py            # Central configuration (env vars, API base URLs)
├── .env                 # Environment variables (client ID, secret, etc.)
├── requirements.txt     # Python dependencies
├── README.md            # Project documentation (this file)
├── templates/
│   ├── login.html       # Login page template
├── routers/
│   ├── __init__.py
│   ├── zoho/
│   │   ├── __init__.py
│   │   ├── auth.py     # Auth routes (login, callback, logout)
│   │   ├── folders.py  # WorkDrive folder routes
│   │   └── zoho_client.py  # Zoho API helpers
│   ├── rag/
│   │   ├── __init__.py
│   │   ├── rag_routes.py  # Retrieval-augmented generation logic
│   │   └── rag_utils.py
│   ├── chatbot/
│   │   ├── __init__.py
│   │   ├── chatbot_routes.py  # Chatbot endpoints
│   │   └── chatbot_utils.py
│   └── otherapi/
│       ├── __init__.py
│       ├── routes.py
│       └── utils.py
├── constants/
│   ├── __init__.py
│   ├── response_messages.py  # Centralized response messages
│   └── status_codes.py       # HTTP status codes
└── utils/
    ├── __init__.py
    └── shared.py     # Shared helpers
    └── zoho_folder_helpers.py     # Zoho api file itration common function
    ├── zoho_client.py
    ├── helpers.py
    

📁 Folder usage

• routers/zoho/ — Zoho SSO and WorkDrive logic.
• routers/rag/ — RAG-based modules (e.g., vector DB queries, knowledge retrieval).
• routers/chatbot/ — AI chatbot integrations and agent logic.
• routers/otherapi/ — additional APIs (placeholder for future integrations).
• constants/ — central definitions for response messages and status codes.
• utils/ — shared helpers and utilities across modules.

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💡 How it works

1️⃣ User clicks Login with Zoho button.
2️⃣ Redirected to Zoho OAuth page.
3️⃣ User authenticates and grants consent.
4️⃣ App exchanges code for tokens (access_token, id_token).
5️⃣ id_token is decoded to get user profile.
6️⃣ Session stored (initially in-memory, can be upgraded later).
7️⃣ User gains access to features like:

• ✅ My Folders
• ✅ Team folders
• 💬 Future: RAG-powered knowledge queries
• 🤖 Future: Chatbot interactions 8️⃣ User can logout anytime.

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✨ Future directions

• 🔒 JWT signature validation for production.
• 🗂️ Expand WorkDrive to include file upload and management.
• 🤖 Integrate advanced AI agent workflows.
• 🔎 Add RAG for contextual enterprise Q&A.
• 🌐 Integrate more SaaS or internal business APIs.

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⚙️ Setup Instructions

1️⃣ Clone the repository

git clone https://github.com/vishwajitvm/FastAPI-Integrations-Hub.git
cd FastAPI-Integrations-Hub

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2️⃣ Create virtual environment & install dependencies

python -m venv venv
source venv/bin/activate    # On Windows: venv\Scripts\activate
pip install -r requirements.txt

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3️⃣ Add environment variables

Create a .env file in the root directory and paste:

FLASK_SECRET_KEY=your_secret_key_here
ZOHO_CLIENT_ID=your_zoho_client_id_here
ZOHO_CLIENT_SECRET=your_zoho_client_secret_here
ZOHO_REDIRECT_URI=http://localhost:8000/callback

⚠️ Match your Zoho app redirect URI exactly.

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4️⃣ Run the app

uvicorn main:app --host 127.0.0.1 --port 8000 --reload

Then open http://localhost:8000/ in your browser.

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🟢 Quick Bash Summary

python -m venv venv
source venv/bin/activate
pip install -r requirements.txt

# Create .env and paste credentials

uvicorn main:app --host 127.0.0.1 --port 8000 --reload

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📄 API Documentation

FastAPI automatically provides interactive and static API documentation out of the box!

1️⃣ Swagger UI URL

 http://localhost:8000/docs

• Interactive interface to explore and test your endpoints directly.

• Supports authentication flows, parameters, and request bodies.

• Ideal for developers and API testers.

2️⃣ ReDocURL

 http://localhost:8000/redoc

• Clean, well-structured static documentation view.

• Great for sharing with business or non-technical stakeholders to explain available APIs.

• Provides easy navigation and human-readable endpoint summaries.

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⚡️ Additional Notes

No extra setup is needed — both docs are auto-generated from your FastAPI routers and docstrings.

You can customize descriptions, summaries, and request/response schemas directly in your router files using standard FastAPI annotations.

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✉️ Contact

Created by Vishwait VM — vishwajitmall0@gmail.com

Feel free to reach out for questions, suggestions, or collaborations! 🚀

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