Cosmic MCP Server

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.

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

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

[mcp_servers.mcp]
url = "https://mcp.cosmicjs.com/v1/buckets/{bucket_slug}"

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

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

This one needs environment variables set before it will start: COSMIC_BUCKET_SLUG (Slug of the Cosmic bucket to operate on), COSMIC_READ_KEY (Bucket read key. Enables the read-only tools), COSMIC_WRITE_KEY (Bucket write key. Required for create, update, delete, and AI generation). The author declared them in the registry entry; get the values from the project itself.

This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.

Endpoints