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design

The canonical 12ui CLI, SDK, MCP server, and visual interface design skills

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build.protocol_tooling.mcp#mcp#mcp-server#design#just-every#image-to-html#image-to-react#image-to-app#layered-document#design-corpus#visual-retrieval

Install design in your MCP client

design is a Model Context Protocol server. Add it to your MCP client config once, restart, and the server's tools become available to your AI assistant. The same JSON snippet below works across all four major clients — only the config file path differs.

  1. Locate your client's MCP config file.
    • Cursor: ~/.cursor/mcp.json
    • Claude Desktop (macOS): ~/Library/Application Support/Claude/claude_desktop_config.json
    • Claude Desktop (Windows): %APPDATA%\Claude\claude_desktop_config.json
    • VS Code: Settings → Extensions → MCP
    • Windsurf: Settings → MCP Servers
  2. Add design to the mcpServers map — paste the snippet below into your config file. If you already have other MCP servers, merge the entry into the existing mcpServers object.
  3. Restart your client so it picks up the new server.
  4. Verify — ask the assistant to list available tools; design's tools should appear.
{
  "mcpServers": {
    "design": {
      "command": "npx",
      "args": [
        "-y",
        "@12ui/design"
      ]
    }
  }
}

Install design in Cursor

Open ~/.cursor/mcp.json in your editor, paste the snippet above into mcpServers, save, and restart Cursor. design will show up in the assistant's tool list on next launch.

Install design in Claude Desktop (macOS)

Open ~/Library/Application Support/Claude/claude_desktop_config.json in your editor, paste the snippet above into mcpServers, save, and restart Claude Desktop (macOS). design will show up in the assistant's tool list on next launch.

Install design in Claude Desktop (Windows)

Open %APPDATA%\Claude\claude_desktop_config.json in your editor, paste the snippet above into mcpServers, save, and restart Claude Desktop (Windows). design will show up in the assistant's tool list on next launch.

Install design in VS Code

Open Settings → Extensions → MCP in your editor, paste the snippet above into mcpServers, save, and restart VS Code. design will show up in the assistant's tool list on next launch.

npm package: @12ui/design

Transport

design supports the following MCP transports. Most AI clients use stdio by default for locally-installed servers.

stdio

From the design README

# @12ui/design `@12ui/design` is the canonical 12ui CLI, SDK, MCP server, and agent-skill package. The `12ui` binary stays stable while package imports and installation use the new name. Install with Node on macOS, Linux, or Windows: ```bash npx -y @12ui/design skill install ``` Or use the genuinely npm-free macOS/Linux installer: ```bash curl -fsSL https://12ui.com/install.sh | sh ``` Both paths pin the exact CLI version, install `12ui-design` into every detected Codex, Claude Code, Grok CLI, Cursor CLI, Antigravity, and GitHub Copilot CLI installation, and open the 12ui device-approval page. The resulting user-owned credential has `design.convert` and `design.corpus.retrieve`, is verified before use, and is stored mode-0600 at `$XDG_CONFIG_HOME/12ui/credentials.json` or `~/.config/

Other Model Context Protocol servers in the same space as design. Each one adds different capabilities to your AI assistant — pick based on the data sources or workflows you need.

Browse the full MCP server directory or use Stork's one-line install to let your agent pick the right server automatically.