Cosmic JS Blog Stay tuned for community news, company announcements and updates from the Cosmic JS team.

How to Deploy a Website with a Custom Domain Using Cosmic JS


Cosmic JS is a powerful CMS API that allows you to manage content for your websites and applications faster and easier.  But did you know that you can also use Cosmic JS to deploy code to your website (in any language) from any GitHub repository?  In addition to deploying content and code, starting today you can also add unlimited domains to your deployed application.  This is revolutionary because it means that moving forward all you need to launch your website is a git repository, a domain name provider and Cosmic JS!  No more hosting server necessary!  I’ve added a couple of screencasts for your viewing.  Let’s get started.

Create a Bucket

After logging in to your Cosmic JS account, create a new bucket.  After creating your new bucket, you will be prompted to install an app.

Install an App

Let's go ahead and install an app, but you could just as easily skip this step and deploy your own application pointed to your Cosmic JS bucket.  After installing your app, you will be prompted to deploy the application.

Deploy the App

Next click "Deploy Web App" to launch the web application to http://[your-bucket-slug].cosmicapp.co.  Once you do this it will take about a minute for the application to deploy on a custom instance of the Cosmic JS app server.  While this is working its magic, let's add our custom domains…

Add Custom Domains

The Cosmic app server subdomain is great for development and staging, but when you go live, you're going to want to add our own custom domains.  Cosmic JS makes this incredibly easy by providing the option to add custom domains to your deployed application.  Here are the 4 easy steps:

1. Go to Settings > Deploy Web App > Add Custom Domains (upgrade your account if needed)
2. Add your custom domains
3. Click "Set Domains"
4. Go to your domain name registrar's website and point your A Name Records to the Cosmic JS app server located at 162.243.13.186

Now navigate to your domain and notice that you now have your application hosted at your custom domain!  Add as many domains / subdomains as you need!  Whenever you need to deploy changes to the app, just push the changes up to your GitHub repository and click "Redeploy Web App".

Cosmic JS now gives you the power to deploy a website faster and more nimbly than any other system.  And all you need is a git repository, a domain name provider and Cosmic JS!

You may also like


The Cosmic CLI puts you in the cockpit of your Cosmic JS Dashboard, giving you access to the powerful features of the Cosmic JS API, all from the comfort of your command line interface.

The process of building your messenger bot is fairly simple the hardest part is setting up your machine to talk to talk to Facebook. That's why today I'm going to walk you through that real quick. Once it is all done you can get right on the way to creating your own bot.

Cosmic JS debutes its Enterprise Plans for Content Management and Application Development. 

In this article, I will show you how you can use Cosmic JS to deploy your own JAMstack website in just a few clicks.  When you JAM with Cosmic, you not only get the benefit of a fast, optimized static website, but your content is also available in the Cosmic JS API.

With all the recent Gatsby fervor, we were delighted to get to sit down with Kyle Mathews, founder of Gatsby and a software engineer living in San Francisco. Follow Kyle on GitHub and Twitter, and enjoy the Q/A. 

The Cosmic CLI is a great way to use all of the powerful features of the Cosmic API from the comfort of your command-line tool.  With this release, you now have some powerful capabilities to demo and deploy Cosmic Apps for faster development and collaboration.