Musterlab
Connect your AI
All styles

Design systems, readable by people and machines.

Musterlab extracts the visual language of real product websites: colour palette, typography, spacing, surfaces and layout. Every style is stored as a structured design system and can be exported as DESIGN.md, Tailwind theme, CSS variables or design tokens.

Browse

Search by name or idea and filter by theme. Open a style to explore its palette, typography, spacing, components and guidelines. Expand the preview for a closer look, then copy a design guide or download CSS variables, a Tailwind theme or design tokens. Related styles help you keep exploring.

Open the catalogue

Connect your AI

The catalogue is available to Claude, Codex, Cursor and other MCP clients through the endpoint /mcp. Requests need a personal API key, and a key works while its owner has an active Pro subscription. Three steps:

  1. Create an account

    Sign up with your email. Favourites work right away; the MCP server needs the next two steps.

    Sign up

  2. Get Pro

    €9 a month or €84 a year, paid through Stripe. Change or cancel at any time from the billing page.

    Open billing

  3. Create a key

    Up to five active keys, each shown once. The setup snippets for each client are on the same page; revoke a key whenever you like.

    Open API keys

Then add the server to your client. As JSON, the shape Cursor and most other clients read:

{
  "mcpServers": {
    "musterlab": {
      "url": "https://musterlab.space/mcp",
      "headers": { "Authorization": "Bearer <api-key>" }
    }
  }
}

Or from the terminal, for Claude Code:

claude mcp add --transport http musterlab https://musterlab.space/mcp --header "Authorization: Bearer <api-key>"

Available tools: search styles, list industries and fonts, fetch a style by id or domain, find similar styles, and export a design system in any of the four formats.

Your account

The library needs no account: every style, its design system and all four exports are open to anyone. An account adds favourites. Mark a style with the heart on a card or on its detail page and find it again under Favourites. Your API keys and subscription live in the account area.