Getting Started with OpenAI API in JavaScriptby@oliviabrown
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Getting Started with OpenAI API in JavaScript

by Olivia BrownJanuary 19th, 2023
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This guide provides an overview of how to get started with the OpenAI API in JavaScript. It covers the necessary tools and provides code examples for building AI-enabled applications. It's a beginner-friendly guide that can help developers to install the necessary tools and dive into building AI-enabled apps using OpenAI API and JavaScript.
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Are you a developer looking for a way to add some language processing power to your projects? Look no further than the OpenAI API! It’s a cloud-based service that gives you access to the language processing capabilities of the OpenAI model. You can use it for all sorts of fun and helpful things like:

  • Translating text from one language to another

  • Summarizing long articles or documents

  • Answering questions

  • Generating new text and ideas.

The OpenAI API is super easy to use, and you can integrate it with your existing apps. Plus, you can fine-tune the API for specific use cases, like training it on your industry’s language and terminology. So, whether you’re a developer, a marketer, a researcher or just someone looking to add some language processing capabilities to your projects, the OpenAI API is a great tool for you.


To effectively work through this article, it would be beneficial to have the following:

  • Node.js setup on your machine.

  • Familiarity with JavaScript language.

Generate API key

To generate an API key for the OpenAI API, you’ll need to sign up for an account on the OpenAI website at

Once you’ve signed up and logged in, you’ll be able to create a new API key by find your profile menu of the website and clicking on the “View API Keys” button.

In the API Key page, clicking on the “Create API Key” button. After you’ve created your API key, you’ll be able to view it on the API keys page, where you can also manage and revoke it if necessary.

Javascript openai package

The openai package is a JavaScript library that makes it super easy for you to interact with the OpenAI API in your code. It provides a simple, user-friendly interface for making API calls and handling responses, so you don’t have to worry about all the nitty-gritty details of making HTTP requests and parsing responses.

You can install the openai package using npm, by running the following command in your terminal or command prompt:

npm install openai

The package has several classes and methods that match up with different endpoints of the OpenAI API, and it makes it simple for you to make requests and handle responses.

It also has helpful functions for things like authentication and handling pagination and rate limits. Plus, it also has a Configuration class that lets you set up the OpenAI API in a more flexible way, and pass in different options.

Please note that this package is currently in beta, and subject to change. You can always check the latest version at

Generate an article using the OpenAI API

const { Configuration, OpenAIApi } = require('openai');

// Create an instance of the OpenAIApi class by passing a configuration object
const openai = new OpenAIApi(new Configuration({
    apiKey: "YOUR_API_KEY" // your API key goes here

// Define a function to generate text
const generateText = async (prompt) => {
    // Make a call to the createCompletion method of the OpenAIApi class
    // and pass in an object with the desired parameters
    const response = await openai.createCompletion({
        model: 'text-davinci-003', // specify the model to use
        prompt: prompt, // specify the prompt
        temperature: 0.8, // specify the randomness of the generated text
        max_tokens: 800, // specify the maximum number of tokens to generate

    // Return the generated text from the response
    return response.choices[0].text;

// Call the generateText function and pass the prompt
console.log(generateText("Write a short article on - how to write a book for beginners")); 

This code snippet is using the openai package to generate text completions for a given prompt.

I defined a function called generateText which takes a prompt as an input and returns the generated text. Inside the function, I created an instance of the OpenAIApi class by passing a configuration object which includes the API key.

Then, I made a call to the createCompletion method of the OpenAIApi class, passing an object with properties such as the model to use, the prompt, the temperature, and the maximum number of tokens to generate.

I also awaited for the response, and returned the generated text from the response

Article generated using openai api

Yes, that’s right! With just a few lines of code, I was able to use the OpenAI API’s Completion endpoint and the davinci model to generate an article. And after some quick formatting in Word, I had a polished piece of text ready to go. It’s that easy.


I hope my little code example showed you how easy it is to use the OpenAI API. With just a few lines of code, you can get started creating cool AI projects. All you need is some JavaScript knowledge and the OpenAI package installed. If you take the time to read the OpenAI API documentation, you’ll learn all the ins and outs of using the API. Now that you know how to get started with the OpenAI API in JavaScript, you’re ready to make some awesome AI projects!