How to use OpenAI API with ExpressJS

OpenAI is a cutting-edge artificial intelligence company that offers a powerful API for developers to integrate natural language processing capabilities into their applications. In this article, we will explore how to use OpenAI API with ExpressJS, a popular web framework for Node.js.

Step 1: Sign up for OpenAI API

First, you need to sign up for OpenAI API and get your API key. You can do this by visiting the OpenAI website and creating an account. Once you have your API key, you can start using the API in your application.

Step 2: Install ExpressJS

If you haven’t already installed ExpressJS, you can do so by running the following command in your terminal:

npm install express

Step 3: Create a new ExpressJS application

Next, create a new ExpressJS application by running the following command in your terminal:

express openai-app

Step 4: Install Axios

To make HTTP requests to the OpenAI API, we will use the Axios library. Install Axios by running the following command in your terminal:

npm install axios

Step 5: Set up your ExpressJS application

In your ExpressJS application, set up a route to handle the API request to OpenAI. Here’s an example of how you can do this:

const express = require('express');
const axios = require('axios');
const app = express();
const apiKey = 'YOUR_API_KEY';

app.get('/openai', async (req, res) => {
  const prompt = 'Once upon a time';
  const response = await axios.post('https://api.openai.com/v1/engines/davinci/completions', {
    prompt: prompt,
    max_tokens: 100
  }, {
    headers: {
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${apiKey}`
    }
  });

  res.json(response.data);
});

app.listen(3000, () => {
  console.log('OpenAI API server is running on port 3000');
});

Step 6: Test your application

You can now test your ExpressJS application by running it in your terminal:

node app.js

Visit http://localhost:3000/openai in your browser to see the response from the OpenAI API.

Conclusion

In this article, we have learned how to use OpenAI API with ExpressJS to leverage the power of artificial intelligence in our applications. By following these steps, you can easily integrate OpenAI API into your web project and harness the capabilities of natural language processing.