LangSearch, An AI Search Engine

This repository contains the code and instructions needed to build a sophisticated answer engine that leverages the capabilities of Groq, Mistral AI's Mixtral, Langchain.JS, Brave Search, Serper API, and OpenAI. Designed to efficiently return sources, answers, images, videos, and follow-up questions based on user queries, this project is an ideal starting point for developers interested in natural language processing and search technologies.

Technologies Used

Next.js: A React framework for building server-side rendered and static web applications.
Tailwind CSS: A utility-first CSS framework for rapidly building custom user interfaces.
Vercel AI SDK: The Vercel AI SDK is a library for building AI-powered streaming text and chat UIs.
Groq & Mixtral: Technologies for processing and understanding user queries.
Langchain.JS: A JavaScript library focused on text operations, such as text splitting and embeddings.
Brave Search: A privacy-focused search engine used for sourcing relevant content and images.
Serper API: Used for fetching relevant video and image results based on the user's query.
OpenAI Embeddings: Used for creating vector representations of text chunks.
Cheerio: Utilized for HTML parsing, allowing the extraction of content from web pages.

Getting Started

Prerequisites

Ensure Node.js and npm are installed on your machine.
Obtain API keys from OpenAI, Groq, Brave Search, and Serper.

Obtaining API Keys

OpenAI API Key: Generate your OpenAI API key here.
Groq API Key: Get your Groq API key here.
Brave Search API Key: Obtain your Brave Search API key here.
Serper API Key: Get your Serper API key here.

Installation

Clone the repository:

git clone https://github.com/yourusername/perplexity-inspired-llm-answer-engine.git

Install the required dependencies:
```
npm install
```
or
```
bun install
```

Create a .env file in the root of your project and add your API keys:

OPENAI_API_KEY=your_openai_api_key
GROQ_API_KEY=your_groq_api_key
BRAVE_SEARCH_API_KEY=your_brave_search_api_key
SERPER_API=your_serper_api_key

Running the Server

To start the server, execute:

npm run dev

bun run dev

the server will be listening on the specified port.

Ollama Support

Since this is set up with the OpenAI SDK, you can easily swap out most parts of the code to use Ollama instead. To get started,

Swap the endpoint from Groq to your Ollama localhost
Change the model string to one you have installed.
Finally use ‘ollama’ as API key 🔑

More info: https://ollama.com/blog/openai-compatibility

Backend + Node Only Express API

In addition to the Next.JS version of the project, there is a backend only version that uses Node.js and Express. Which is located in the 'original-express-api' directory. This is a standalone version of the project that can be used as a reference for building a similar API. There is also a readme file in the 'original-express-api' directory that explains how to run the backend version.

Contributing

Contributions to the project are welcome. Feel free to fork the repository, make your changes, and submit a pull request. You can also open issues to suggest improvements or report bugs.

M-Awwab-Khan/LangSearch