Cosmic MCP Server

com.cosmicjs/mcp

Repository Registry

What is the Cosmic MCP server?

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

How to install Cosmic

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

COSMIC_BUCKET_SLUG
required
Slug of the Cosmic bucket to operate on
COSMIC_READ_KEY
required
secret
Bucket read key. Enables the read-only tools
COSMIC_WRITE_KEY
secret
Bucket write key. Required for create, update, delete, and AI generation
Authorization
required
secret
Bearer <read_key> for reads, or Bearer <read_key>:<write_key> to allow writes

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@cosmicjs/mcp"
      ],
      "env": {
        "COSMIC_BUCKET_SLUG": "<YOUR_COSMIC_BUCKET_SLUG>",
        "COSMIC_READ_KEY": "<YOUR_COSMIC_READ_KEY>",
        "COSMIC_WRITE_KEY": "<YOUR_COSMIC_WRITE_KEY>",
        "Authorization": "<YOUR_AUTHORIZATION>"
      }
    }
  }
}

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