Integrating ChatGPT with Node.js App using OpenAI API: JSON Formatted Responses Tutorial

In this tutorial, we will guide you through the process of integrating ChatGPT with a Node.js application using the OpenAI API. ChatGPT is a state-of-the-art deep learning model developed by OpenAI that can generate human-like text responses to a variety of prompts and questions.

Before we begin, make sure you have an OpenAI API key. You can sign up for an API key at the OpenAI website.

Step 1: Create a new Node.js project
First, create a new Node.js project by running the following command in your terminal:

mkdir chatgpt-nodejs
cd chatgpt-nodejs
npm init -y

Step 2: Install the necessary packages
Next, install the necessary packages using the following command:

npm install axios dotenv

Step 3: Set up your OpenAI API key
Create a new file called ".env" in the root of your project directory and add your OpenAI API key like this:

OPENAI_API_KEY=YOUR_API_KEY_HERE

Step 4: Create a new file for your ChatGPT integration
Create a new file called "chatgpt.js" in the root of your project directory. This file will contain the code for integrating ChatGPT with your Node.js application.

Step 5: Import the necessary modules
In the "chatgpt.js" file, import the necessary modules like this:

const axios = require('axios');
require('dotenv').config();

Step 6: Create a function to send a prompt to ChatGPT
Next, create a function called “sendMessage” that will send a prompt to ChatGPT and receive a response using the OpenAI API.

const sendMessage = async (prompt) => {
  const response = await axios.post('https://api.openai.com/v1/engines/davinci/completions', {
    prompt: prompt,
    max_tokens: 150,
  }, {
    headers: {
      'Authorization': `Bearer ${process.env.OPENAI_API_KEY}`,
      'Content-Type': 'application/json',
    },
  });

  return response.data.choices[0].text.trim();
};

Step 7: Create a function to handle user input
Create a function called “handleInput” that will handle user input, send a prompt to ChatGPT, and return the response.

const handleInput = async (input) => {
  const prompt = `The following is a conversation with an AI assistant. The assistant is helpful, creative, clever, and very friendly. nnUser: ${input}nAI:`;

  const response = await sendMessage(prompt);

  return response;
};

Step 8: Implement a simple chat interface
Create a simple chat interface using the “readline” module, which will take user input, send it to ChatGPT, and display the response.

const readline = require('readline');

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
});

rl.question('User: ', async (input) => {
  const response = await handleInput(input);
  console.log(`AI: ${response}n`);
  rl.close();
});

Step 9: Run your Node.js application
To run your Node.js application and start chatting with ChatGPT, run the following command in your terminal:

node chatgpt.js

You can now start interacting with ChatGPT and receive human-like text responses in a chat-like interface.

In this tutorial, you have learned how to integrate ChatGPT with a Node.js application using the OpenAI API. You can further enhance the chat interface by adding more features and customization to suit your specific use case. Feel free to experiment and explore other capabilities of ChatGPT and the OpenAI API to create more engaging and interactive applications.