Why Most CMSs Are Not Built for Developers
Traditional CMSs were built for content managers. Developers were an afterthought: forced to use templating engines, work around rigid data models, or deploy and maintain CMS infrastructure alongside their actual application.
Modern headless CMSs improved things, but most still demand trade-offs: learn GROQ (Sanity), deploy a separate studio (Sanity), pay enterprise prices for basic API access (Contentful), or self-host and manage your own database and auth (Strapi).
Cosmic was built developer-first from the start. Here is what that means in practice.
What Cosmic Gives Developers
REST API That Stays Out of Your Way
Cosmic's API returns clean, structured JSON. No wrapper schemas to unwrap. No proprietary query language to learn. No SDK required for basic requests.
Filter by type, search by title, filter by metadata values, sort, paginate. All with URL parameters. The response is predictable JSON every time.
TypeScript SDK with Full Type Safety
The official package gives you a chainable query API with complete TypeScript types:
Autocomplete, type inference, and runtime safety. No hacks needed.
CLI for Bucket Management
The Cosmic CLI lets you scaffold projects, push content models, manage objects, and run migrations from the terminal:
Script your content infrastructure the same way you script everything else.
MCP Server for AI-Native Development
Cosmic ships with an MCP (Model Context Protocol) Server. Connect your Cosmic bucket directly to any MCP-compatible AI coding tool:
- Cursor — Query, create, and update Cosmic content without leaving your editor
- Claude Code — Let Claude manage your content model and create objects as part of a larger dev task
- GitHub Copilot — Fetch content schemas and object data inline while writing code
Your AI assistant becomes aware of your content structure, your object types, and your data. Content operations become as natural as reading a file.
Agent Skills for Cursor, Claude Code, and Copilot
Cosmic Agent Skills are pre-built tool definitions that give AI coding assistants the ability to interact with your Cosmic bucket. Install the skill and your AI assistant can:
- List object types and their schemas
- Fetch, create, update, and delete objects
- Upload and manage media
- Query content with filters and metadata conditions
No custom integration required. Point the skill at your bucket and start building.
AI Agents Built Into the Platform
Cosmic AI Agents are fully autonomous. They are not just autocomplete helpers or writing assistants. They perform real tasks independently:
Content Agents research topics, write drafts, generate images, and publish to your bucket on a schedule. Set up a content pipeline once and walk away.
Code Agents connect directly to your GitHub repository. They read your codebase, create branches, commit code changes, and open pull requests. Your CMS can ship code.
Computer Use Agents control a browser. Navigate URLs, click elements, fill forms, capture screenshots. Use them for E2E tests, competitive research, or automated monitoring.
Team Agents join your Slack, WhatsApp, or Telegram workspace. Your team triggers content operations from the tools they already use.
Multi-agent workflows chain these together. A computer use agent monitors Hacker News, a content agent writes a post on the trending topic, a code agent commits SEO improvements. All on a schedule. All without a human in the loop.
Event-Triggered Workflows
Trigger workflows on content events: on object create, on object update, on object publish. Chain agents together based on what happens in your bucket. Build content pipelines that react to your editorial workflow, not just your clock.
Webhooks
Fire webhooks on any content event: create, update, delete, publish, unpublish. Point them at Vercel, Netlify, Zapier, your own API, or any endpoint. Available on all plans (as a feature add-on on self-service plans).
Multi-Bucket Architecture
Every Cosmic project can contain multiple Buckets. Use separate buckets for staging and production, for different sites, or for different environments. The Cosmic AI agents can operate across multiple buckets in the same project — reading from one, writing to another.
Framework Compatibility
Cosmic works with every modern JavaScript framework. Same REST API. Same SDK. No adapters, no bridge libraries, no special setup per framework.
| Framework | Integration | Template Available |
|---|---|---|
| Next.js | App Router, Pages Router, RSC, SSG, SSR, ISR | Yes |
| React | Client, server, hooks | Yes |
| Vue | Composition API, Options API | Yes |
| Nuxt | useAsyncData, useFetch, server routes | Yes |
| Astro | SSG, SSR, island components | Yes |
| Remix | Loaders, actions | Yes |
| Svelte / SvelteKit | load functions, stores | Yes |
Also works with: Express, Fastify, Deno, Bun, Next.js API routes, React Native, Electron, and any HTTP client in any language.
Pricing for Developer Teams
Pricing verified April 2026.
| Plan | Price | Buckets | Team Members | Objects | AI Agents |
|---|---|---|---|---|---|
| Free | $0/month | 1 | 2 | 1,000 | 1 (manual) |
| Builder | $49/month | 2 | 3 | 5,000 | 3 (scheduled) |
| Team | $299/month | 3 | 5 | 20,000 | 10 (scheduled) |
| Business | $499/month | 5 | 10 | 50,000 | 25 (scheduled) |
| Enterprise | Custom | Custom | Custom | Custom | Custom |
Additional team members: $29/user/month. All plans include the REST API, TypeScript SDK, CLI, MCP Server, and AI tokens.
What Developers Say
"Cosmic is: us never having to ask a developer to change anything on the backend of our website."
Maximilian Wuhr, Co-Founder at FINN
That is what a developer-first CMS looks like in practice: content editors get autonomy, developers get freed from CMS maintenance tickets.
Start Building in Minutes
Free plan: 1 Bucket, 2 team members, 1,000 objects, full API access, AI tokens included. No credit card required.
Evaluating Cosmic for your team? Book a 30-minute call with Tony, Cosmic's CEO.
Developer resources:
