Build Apps Faster API-first CMS for building content-powered apps in any programming language.

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Developers at successful companies choose Cosmic JS

For Developers


Cosmic JS offers an intuitive API that can deliver content to any website or application. This gives you the freedom to build your application using any programming language and allows for easier scaling within your development team.

Developer tools and features are offered as valuable time-savers during the development process. It's easier than ever to manage your project from the first line of code, to content population, to launch day.

For Content Editors


Cosmic JS offers a streamlined editing experience that gives you everything you need to publish content quickly and easily. Since there is no CMS installation, you can easily build content in any phase of development and avoid unnecessary process bottlenecks.

Add rich text, drag and drop media and upload video. Set roles and permissions for easy content collaboration within your team. Content management is faster, easier and keeps the project on track.

What Can You Create?


This simple note taking app lets you manage notes inside of your command line application.  Use the Cosmic JS API to view your notes from anywhere on any device.

Note to Self

An Angular JS ecommerce app that allows you to process orders from customers and accept Stripe payments for goods and services.  Manage inventory in your Cosmic JS Dashboard or in the admin area on the website.

Ecommerce App

Website built using the Node.js Website Boilerplate.  Fully responsive down to mobile, SEO ready, includes a contact form and full site search.

Roofing Company

This powerful website gives you both the flexibility to manage content from the Cosmic JS API and the speed of static HTML.  Plus you can use Markdown files and automate the build process using Webhooks.  Check out the accompanying article to see how it's built.

Static Website

Vue universal website built using the Nuxt.js framework.  Adapted by Sebastien Chopin from the Next.js website.  Code is shared between the client and server making development a breeze.  Add Cosmic JS-powered content and you're taking your website to the Nuxt.js level.

Nuxt.js Website

A React blog that connects to your Cosmic JS Bucket efficiently through the GraphQL API.  Install in a few clicks and check out the blog on how it's built.

React GraphQL Blog

Product Tour


People Have Said...

Cosmic JS removes many headaches by just working, right out the box. Plus, it is blazingly fast!

Application Developer, Digital Agency, London, UK

A more intuitive API than any other API-based CMS out there.

Software Engineer, Creative and Interactive Agency, Sydney, AUS

You can build a pretty complex CMS and API in about 10 minutes with Cosmic JS.

Director of Digital & Emerging Media, The Smithsonian Design Museum, New York, NY

Next time I need to build a CMS I'll definitely replace WordPress with Cosmic JS and slap a React front end on it.

Developer, National Magazine, Sydney, AUS

Cosmic JS makes me continuously say, where have you been all my life!

Software Engineer, Interactive Agency, Pennsylvania, USA

Cosmic JS totally rocks!

iOS developer, Interactive Agency, New York, NY