How to Build a Simple API Using Cursor in Under 2 Hours

Building APIs can often feel overwhelming, especially for indie hackers and solo founders who have limited time and resources. But what if I told you that you could build a simple API in under 2 hours using Cursor? In 2026, Cursor has become a go-to tool for developers looking to streamline their coding process. Let's dive into how you can leverage this tool to create an API quickly and effectively.

Time Estimate

You can finish this project in about 2 hours, including setup and testing.

Prerequisites

Before we get started, make sure you have:

• A free Cursor account (no credit card required).
• Basic knowledge of JavaScript or Python.
• A code editor (like VSCode).
• Postman or any API testing tool.

Step-by-Step Guide

Step 1: Setting Up Cursor

1. Create a Cursor Account: Go to Cursor’s website and sign up for a free account.
2. Install the Cursor CLI: Open your terminal and run the following command to install the Cursor Command Line Interface:

   npm install -g cursor-cli
   

Step 2: Create Your API Project

1. Initialize a New Project: In your terminal, navigate to your desired project directory and run:

   cursor init my-api
   

   This command creates a basic project structure for you.

2. Set Up Your API Endpoint: Open the index.js file in your code editor. You can use the following code to create a simple GET endpoint:

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

Step 3: Running Your API

1. Install Dependencies: Make sure to install Express by running:

   npm install express
   

2. Start the Server: In your terminal, run:

   node index.js
   

   You should see "Server running on port 3000" in your terminal.

Step 4: Testing Your API

1. Use Postman: Open Postman and create a new GET request to http://localhost:3000/api/hello.
2. Check the Response: You should receive a JSON response:

   { "message": "Hello, world!" }
   

Troubleshooting

• Error: Port Already in Use: If you encounter this error, change the PORT variable in the code to another number (like 3001).
• No Response in Postman: Ensure your server is running and the endpoint path is correct.

What's Next?

Now that you have a simple API running, consider expanding its functionality. You can:

• Add more endpoints for different resources.
• Integrate a database like MongoDB or PostgreSQL.
• Deploy your API using platforms like Vercel or Heroku.

Conclusion

Building a simple API with Cursor is not only possible but can be done in under 2 hours. This is a great starting point for indie hackers looking to integrate APIs into their projects. Start here: sign up for Cursor, follow the steps above, and get coding!