ChatBot API with LangChain and Express.js

This project provides an API that exposes a chatbot using LangChain with Express.js. The chatbot uses a Retrieval-Augmented Generation (RAG) approach to retrieve relevant information . This README outlines the setup, configuration, and usage of the API.

Prerequisites

Before you begin, ensure you have the following installed:

• Node.js (version 14 or higher)
• npm or yarn

Installation

1. Clone the repository:

   git clone https://github.com/Ryrahul/Express-LangChainJs.git
   cd chatbot-api
   

Configuration

The API uses environment variables for configuration. Create a .env file in the project root and see the .env.example for reference

Usage

After installation and configuration, you can start the API:

npm start

Endpoints:

• *POST /chat
  • Request body: { "message":"Your Message" }

Document For Rag Retrival

• Navigate to -->> src/utils/save-to-db.ts
• Add Your File Path