Cosmic MCP Server: Install & Setup

Install Cosmic in Claude Code

Remote URL

Claude Code

claude mcp add --transport http cosmic https://mcp.cosmicjs.com/v1/buckets/{bucket_slug}

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "cosmic": {
      "url": "https://mcp.cosmicjs.com/v1/buckets/{bucket_slug}"
    }
  }
}

npm

Claude Code

claude mcp add cosmic -e COSMIC_BUCKET_SLUG=... -e COSMIC_READ_KEY=... -- npx -y @cosmicjs/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "cosmic": {
      "command": "npx",
      "args": [
        "-y",
        "@cosmicjs/mcp"
      ],
      "env": {
        "COSMIC_BUCKET_SLUG": "...",
        "COSMIC_READ_KEY": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Cosmic MCP server do?

Manage Cosmic CMS content, media, object types, and AI generation from any MCP client.

Is the Cosmic MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Cosmic run locally or remotely?

Local + Remote. Can run locally or be used as a hosted remote server.

How do I add Cosmic to Claude Code?

Run: claude mcp add --transport http cosmic https://mcp.cosmicjs.com/v1/buckets/{bucket_slug}

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