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 example app demonstrates how you can use React, MobX and the Cosmic JS API to create and remove posts from your bucket.

MobX Example App

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

A simple landing page for lead email capture to MailChimp.  Install, deploy and begin capturing email addresses in minutes.

Email Capture

A voting app that uses React for UI, MobX for state management and React Bootstrap for the frontend framework.  Add unlimited polls, upload images for each option and each poll has its own unique link.

Voting App

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 simple inventory management application powered by the Cosmic JS API built with Laravel and Vue.js.

Inventory App

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