How to ChatGPT API?

ChatGPT has quickly become one of the most popular AI chatbots available today. Developed by OpenAI, ChatGPT launched in November 2022 and immediately drew attention for its human-like conversational abilities. While ChatGPT itself is free to use, many developers are eager to integrate ChatGPT into their own applications and services. Luckily, OpenAI provides a ChatGPT API that makes this possible. This article will explain how to get started using the ChatGPT API to turbocharge your next project.

By the way, have you heard about Arvin? It’s a must-have tool that serves as a powerful alternative to ChatGPT. With Arvin(Google extension or iOS app), you can achieve exceptional results by entering your ChatGPT prompts. Try it out and see the difference yourself!

Overview of the ChatGPT API

The ChatGPT API allows you to integrate the AI assistant into your own apps and websites. It’s a REST API that you can query from any programming language. Some key things to know:

  • It’s a paid API that requires an API key. Plans start at $0.002 per 1k tokens.
  • The API lets you send a prompt and receive a response from ChatGPT. Responses can be up to 4096 tokens.
  • There are endpoints for both chat completions and content moderation.
  • You make requests by sending JSON data and receive JSON responses.
  • It’s easy to get started with the API using cURL or languages like Python, JavaScript, etc.

Signing Up for an API Key

To use the ChatGPT API, you’ll need to sign up for an API key. Here are the steps:

  1. Go to and sign up for an account.
  2. Once logged in, go to your account dashboard.
  3. Click on “View API keys” and then “Create new secret key”.
  4. Give the key a name and click “Create secret key”.
  5. Copy the newly generated API key to use in your code.

Take note of your API key as you’ll need to pass it with every API request. Keys should be kept secret.

Making Your First API Request

Let’s now make your first request to the ChatGPT API. We’ll use cURL on the command line here, but the same principles apply for any programming language.

First, we’ll define our secret API key and prompt:


PROMPT="Hello, how are you today?"

Next we’ll make a cURL request to the /v1/completions endpoint:

curl \
  -H 'Content-Type: application/json' \
  -H "Authorization: Bearer $API_KEY" \
  -d '{
    "model": "text-davinci-003", 
    "prompt": "'$PROMPT'",
    "temperature": 0,
    "max_tokens": 100

The API will return a JSON response with the ChatGPT completion:

  "id": "cmpl-6DRd11KuY3uOeOiA7NjhCkCmzuvZ",
  "object": "text_completion",
  "created": 1677069323,
  "model": "text-davinci-003",
  "choices": [
      "text": "\n\nI'm doing well, thanks for asking! How about yourself?",
      "index": 0,
      "logprobs": null,
      "finish_reason": "length"

And there we have it – ChatGPT has responded to our prompt! With the basics down, let’s look at how to integrate this into an application.

Integrating the API into Your Application

Here are some best practices for integrating the ChatGPT API into your apps:

Use an async API client – Use a client like the OpenAI Python library so you can call the API asynchronously instead of blocking.

Cache responses – Cache ChatGPT’s responses in a database to avoid hitting rate limits and improve performance.

Queue up user requests – Queue prompts from users as they come in and handle them asynchronously.

Implement error handling – Handle errors like rate limits gracefully so your app remains stable.

Monitor costs – Keep an eye on your monthly API usage as costs can add up quickly. Enforce limits per user if needed.

Plan for moderation – Have a strategy to moderate harmful content from ChatGPT responses.

Update the model – Switch to more capable ChatGPT models once available like gpt-4.

Example Code for Calling the API

Here’s some example Python code for asynchronously calling the ChatGPT API:

import openai

openai.api_key = "sk-123456789123456789123456789"

async def generate_response(prompt):
  response = openai.Completion.create(
  return response

async def main():  
  prompt = "Hello assistant, how can I make pizza dough from scratch?"
  response = await generate_response(prompt)

This uses the OpenAI Python library to call the API asynchronously. The generate_response function handles querying the API.


The ChatGPT API makes it easy to integrate conversational AI into any application. With an API key, you can start building apps powered by ChatGPT today. Some best practices are caching, queueing requests, implementing error handling, and planning for moderation. Refer to the OpenAI documentation for more details on integrating the API into your next project. Happy coding!

By the way, if you want to find other types of prompts, please visit AllPrompts. We can help you to find the right prompts, tools and resources right away, and even get access to the Mega Prompts Pack to maximize your productivity.


How much does the ChatGPT API cost?

The ChatGPT API costs $0.002 USD per 1,000 tokens. So a 1,000 token request would cost $0.002. OpenAI also offers monthly packages for high volume usage.

What programming languages can be used with the API?

The ChatGPT API is a REST API, so it can be called from any programming language including Python, JavaScript, Java, C#, Ruby, PHP, and more.

Are there limits on ChatGPT API usage?

Yes, the ChatGPT API has limits on things like the max request size, frequency, and number of concurrent requests. These limits prevent abuse and ensure stability. Check OpenAI’s docs for specifics.