How to Build a Simple API Using GitHub Copilot in Under 30 Minutes (2026)

Building an API can seem daunting, especially if you're a solo founder or indie hacker juggling multiple projects. But it doesn't have to be! With the help of GitHub Copilot, you can whip up a simple API in under 30 minutes. If you're wondering whether you can really do this without diving deep into backend complexities, the answer is yes. Let’s break it down.

Prerequisites: What You’ll Need

Before we dive in, make sure you have the following:

• GitHub Account: You need this to access Copilot.
• Visual Studio Code: The editor where you’ll be writing your code.
• Node.js: You’ll need this installed on your machine for building the API.
• GitHub Copilot Subscription: $10/month or $100/year. A free trial is available for new users.

Step 1: Set Up Your Environment (5 Minutes)

1. Install Node.js: Go to the Node.js website and download the latest version. Follow the installation instructions.
2. Open Visual Studio Code: Install the GitHub Copilot extension from the marketplace if you haven’t already.
3. Create Your Project Directory: Open your terminal and run:

   mkdir simple-api
   cd simple-api
   npm init -y
   

Step 2: Install Dependencies (5 Minutes)

You’ll need Express.js for your API. In your terminal, run:

npm install express

Step 3: Start Coding with GitHub Copilot (15 Minutes)

1. Create an index.js file in your project directory:

   touch index.js
   

2. Use GitHub Copilot to Generate Code: Start typing the following in index.js, and let Copilot suggest the code:

   const express = require('express');
   const app = express();
   const PORT = process.env.PORT || 3000;
   
   app.get('/api/hello', (req, res) => {
       res.json({ message: 'Hello, World!' });
   });
   
   app.listen(PORT, () => {
       console.log(`Server is running on port ${PORT}`);
   });
   

3. Run Your API: In your terminal, execute:

   node index.js
   

   You should see Server is running on port 3000.

4. Test Your API: Open a browser and navigate to http://localhost:3000/api/hello. You should see the JSON response: {"message":"Hello, World!"}.

Step 4: Troubleshooting Common Issues

• Port Already in Use: If you get an error about the port being in use, try changing the port number in the index.js file.
• Copilot Suggestions Not Appearing: Make sure the GitHub Copilot extension is enabled in VS Code and that you’re logged in.

What's Next?

Now that you have a simple API running, consider expanding its functionality. You could add more endpoints, integrate a database, or even deploy it using services like Heroku or Vercel.

Conclusion: Start Here

Building an API doesn't have to be a lengthy process. With GitHub Copilot, you can leverage AI to speed up your coding and get your product up and running quickly. If you follow these steps, you can have a working API in less than 30 minutes.

For those looking to dive deeper into API development or explore more complex functionalities, consider checking out our podcast, Built This Week, where we discuss tools and techniques for indie builders like you.