How to Use GitHub Copilot to Write Your First API in 1 Hour

If you're a solo founder or indie hacker, the thought of building an API might feel daunting, especially if your coding skills are limited. But what if I told you that with the right tools, you could have a functional API up and running in just one hour? That’s where GitHub Copilot comes in. As of February 2026, this AI-powered coding assistant can help you write code faster and with fewer errors. Let’s dive into how to leverage GitHub Copilot to build your first API.

Time Estimate: 1 Hour

You'll need about an hour to complete this tutorial if you follow the steps closely. Grab a cup of coffee, and let's get started!

Prerequisites

1. GitHub Account: You need to sign up for GitHub if you don’t have an account.
2. Visual Studio Code: Download and install VS Code.
3. GitHub Copilot: You can use GitHub Copilot for $10/month after a 60-day free trial. Make sure to install the Copilot extension in VS Code.
4. Node.js: Install Node.js to run your API.

Step-by-Step Guide

Step 1: Set Up Your Project

1. Open VS Code and create a new directory for your project:

   mkdir my-first-api
   cd my-first-api
   

2. Initialize a new Node.js project:

   npm init -y
   

Step 2: Install Express

Express makes it easy to create APIs in Node.js. Install it by running:

npm install express

Step 3: Create Your API File

1. Create a new file called app.js:

   touch app.js
   

2. Open app.js in VS Code.

Step 4: Use GitHub Copilot to Write Code

Start typing in app.js and let GitHub Copilot suggest code. For example, type:

// Create an Express app
const express = require('express');
const app = express();

// Set up a basic route
app.get('/api', (req, res) => {
    res.send('Hello World!');
});

// Start the server
app.listen(3000, () => {
    console.log('API is running on http://localhost:3000');
});

Copilot will suggest the rest of the code. Accept the suggestions by pressing Tab.

Step 5: Run Your API

1. Save your changes.
2. Run the API:

   node app.js
   

3. Open your browser and go to http://localhost:3000/api. You should see "Hello World!" displayed.

Step 6: Test Your API

You can use tools like Postman or cURL to test your API endpoints. For example, using cURL:

curl http://localhost:3000/api

Troubleshooting

• If your API doesn’t start: Check for syntax errors in your code. GitHub Copilot might not always get it right, so read through the suggestions carefully.
• If you get a 404 error: Make sure you’re hitting the correct endpoint in your browser or testing tool.

What's Next?

Now that you have a basic API running, consider expanding its functionality. You might want to add more routes, connect to a database, or implement authentication. GitHub Copilot can assist with these tasks as well.

Conclusion: Start Here

Using GitHub Copilot, building an API doesn’t have to be a tedious task. With just an hour’s investment, you can get a functional API up and running. Remember, the key is to leverage the suggestions Copilot provides while ensuring your code is logically sound.

If you’re looking to dive deeper into API development, consider checking out our podcast, Built This Week, where we discuss tools and techniques that can help you build faster and better.