Headless CMS for Remix: Step-by-Step Tutorial

Remix is one of the best full-stack React frameworks available today. Its nested routing model, loader functions, and server-first philosophy make it a natural fit for a headless CMS architecture — and Cosmic is the CMS that fits that model best.

In this tutorial, you'll build a Remix app connected to Cosmic, fetch content in loader functions using the TypeScript SDK, render it in routes, and deploy to Vercel or Netlify.

Target keyword: Remix headless CMS tutorial

Prerequisites

• Node.js 18+
• A free Cosmic account (sign up here)
• Basic familiarity with React and TypeScript

Step 1: Create a Remix App

Scaffold a new Remix project:

Choose the defaults when prompted. Remix will scaffold a full project with TypeScript support out of the box.

Start the dev server to confirm everything works:

You should see the default Remix welcome page at .

Step 2: Install the Cosmic TypeScript SDK

Install the official Cosmic SDK:

This gives you — the fully typed client you'll use to fetch content from your Cosmic bucket.

Step 3: Set Up Your Cosmic Bucket

1. Log in to Cosmic and create a new bucket (or use an existing one).
2. Create an Object Type called with these metafields:
   • (text)
   • (markdown)
   • (date)
   • (textarea)
3. Add a few test blog post objects.
4. Navigate to Settings > API Keys in your bucket and copy your Bucket Slug and Read Key.

Step 4: Configure Environment Variables

Create a file in your project root:

Remix reads files automatically in development. For production, you'll set these in your hosting provider's dashboard.

Step 5: Create a Cosmic Client Module

Create a reusable client so you don't repeat the initialization in every route:

The suffix tells Remix to never bundle this file for the client — keeping your API keys server-side only.

Step 6: Fetch Content in a Loader Function

Now create a blog index route that fetches all posts:

Step 7: Fetch a Single Post

Now create the individual blog post route:

Step 8: Handle Errors Gracefully

Remix has built-in error boundaries. Add one to your root or route file:

Step 9: Deploy to Vercel

Vercel has first-class Remix support. Install the Vercel CLI and deploy:

Follow the prompts. When asked about the framework, select Remix.

Then add your environment variables in the Vercel dashboard under Settings > Environment Variables:

Redeploy to pick up the variables:

Deploy to Netlify (Alternative)

If you prefer Netlify:

Add your environment variables in the Netlify dashboard under Site Settings > Environment Variables, then trigger a new deploy.

What's Next

You now have a fully functional Remix app powered by Cosmic. From here you can:

• Add more Object Types (products, team members, case studies)
• Use Cosmic's AI Agents to auto-generate blog content
• Connect the Cosmic MCP Server to your AI toolchain
• Use the Cosmic CLI to manage content models from the terminal

Pricing

Cosmic's Free plan is forever free — no credit card required.

Additional users are $29/user/month on any plan.

Related Resources

• Headless CMS for Remix — Landing Page
• Headless CMS for React
• Cosmic Docs

Ready to build? Sign up free — no credit card required. Or book a demo with Tony to get a guided walkthrough.