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Content API and developer toolkit


Powerful modeling

Extensive tooling

Fast setup




👋 Welcome to the documentation site for the Cosmic headless CMS. In this site, find references to interact with the Cosmic API and available clients including methods to CREATE, READ, UPDATE, and DELETE content from your Buckets.

If you do not have a Cosmic account with a Bucket already set up, you will need to sign up and follow the steps to create a new Bucket. Create free account →


Cosmic provides a globally fast and secure content management system and API toolkit. Use our optimized CMS infrastructure to power content for your websites and apps. Focus on your app and business logic, not CMS infrastructure. Read customer stories to learn how modern development teams use Cosmic to rapidly scale their business goals.

Use Cases

What can you build with Cosmic? We provide the tools for content management and collaboration to power content for everything from simple websites, mobile apps, blogs, to full-featured portals with personalized content and configurations.


The only limitation is your imagination.

See available app templates, extensions, and how-to articles by active members of our community for more ideas. And watch some videos below.

Explore Videos

Getting Started with Cosmic and Next.js (Part 1)

Build a Blog Using Nuxt.js + GraphQL + Cosmic

Check out more videos on the Cosmic YouTube channel.


💬 Join the conversation on Slack

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📃 Read community how-to articles


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About This Site

This site uses the Nextra static site generator which uses Next.js and MDX. It includes dark mode 🌒, is hosted on Vercel ▲, and the codebase is available open source on GitHub. Contributions welcome!