Every developer has been there.

You come up with a promising side project idea, sketch out the features, choose the tech stack, and start planning the launch. Then comes one of the most frustrating parts of the process: finding a domain name.

You brainstorm dozens of ideas only to discover that most of them are already registered, parked, or unavailable. Manually checking every domain through registrars can quickly become a time-consuming task that slows down the entire creative process.

To speed things up, I started using a simple Node.js script to check multiple domain ideas at once.

Why Automate Domain Availability Checks?

When you're brainstorming names, speed matters.

Instead of opening multiple browser tabs and checking domains one by one, automation allows you to:

Validate domain ideas instantly
Test multiple naming variations
Reduce manual work
Improve startup and SaaS branding workflows
Save time during project planning

For developers who frequently build side projects, this can significantly streamline the naming phase.

A Simple Node.js Solution

The following example demonstrates how to check multiple domain names using an API endpoint.

const checkDomain = async (domain) => {
const url = https://api.example.com/check?domain=${domain};

try {
const response = await fetch(url);
const data = await response.json();

return {
  domain,
  available: data.available
};

} catch (error) {
return {
domain,
available: false,
error: error.message
};
}
};

const checkMultipleDomains = async (domains) => {
const results = await Promise.all(domains.map(checkDomain));

results.forEach(result => {
console.log(
${result.domain}: ${
result.available ? "✅ Available" : "❌ Taken"
}
);
});
};

checkMultipleDomains([
"myapp.io",
"fastapi.dev",
"cooltool.co"
]);
How It Works

The script follows a straightforward process:

Accept a list of domain names.
Send requests to a domain-checking API.
Collect responses asynchronously.
Display availability results in the console.

Using Promise.all() allows all checks to run concurrently, making the process much faster than checking domains individually.

Benefits for SaaS Founders and Developers

If you're building SaaS products, developer tools, AI applications, or startup projects, domain research often becomes part of the workflow.

Automated domain validation can help you:

Generate branding ideas faster
Evaluate naming options in bulk
Avoid investing time in unavailable names
Create internal naming workflows for teams
Support product launch planning

The approach is also useful when testing different TLDs such as:

.com
.io
.dev
.app
.co
.ai
Taking It Further

Once you have a basic checker working, you can expand it by:

Exporting results to CSV
Building a web dashboard
Integrating AI-powered name generation
Adding domain scoring systems
Connecting availability checks to project management tools

You could even integrate the process into your development workflow to validate naming options before launch.

Final Thoughts

Finding the perfect domain name is often harder than building the first version of a project. Automating domain availability checks with Node.js removes a repetitive task and helps you focus on what matters most—building your product.

Whether you're launching a SaaS platform, developer tool, startup, or side project, a simple automation script can save valuable time and make the brainstorming process far more efficient.

Have you built any tools to automate domain research or startup naming? Share your workflow and ideas in the comments.