Chatbot with Node.js & OpenRouter API

A simple and interactive chatbot, powered by a Node.js backend to securely handle API requests to the OpenRouter AI service.

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✨ Features

• Toggleable Chat Window: Show or hide the chatbot interface with a click.
• AI Responses: Send messages and receive replies instantly via the OpenRouter API.
• Secure API Handling: Uses a Node.js and Express server to protect the API Key, ensuring it is never exposed on the client-side.
• Markdown Support: The chatbot can respond with styled text, lists, and even code blocks.

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🚀 Tech Stack

• Frontend: HTML, CSS, JavaScript
• Backend: Node.js, Express.js
• API: OpenRouter.ai (using the DeepSeek: R1 (free) Model)
• Libraries:
  • dotenv For managing environment variables.
  • marked.js To render markdown in chat responses

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📁 Folder Structure

├── public/        
│   ├── index.html
│   └── script.js
├── server.js           # Main server
├── .env                # Environment variables
├── package.json
└── README.md

Prerequisites

You need to have Node.js and npm installed on your system.

Installation

1. Clone the Repository

   git clone https://github.com/AdityaLF/ChatBot.git
   cd ChatBot

2. Install NPM Packages

   npm install

3. Set Up Environment Variables

   • Open the template file, .env.example
   • Fill it out by replacing API_KEY_HERE with your actual API KEY.
   • Save your changes, then rename the file from .env.example to .env

4. Run the Server Start the backend server.

   node server.js

5. Open in Browser Navigate to http://localhost:3000 in your web browser to see the application live.

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👤 Author

• GitHub: @AdityaLF
• Discord: @05.07am
• Support Me: ko-fi.com/adityaf

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📄 License

This project is licensed under the MIT License.