MCP setup · Anthropic
CSS Crème in Claude Desktop
One command connects Claude Desktop to 12 tools that search real design systems, pull a DESIGN.md with measured contrast, and decode any public site into tokens. Free, no account, no API key.
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Run one command
npx -y add-mcp https://csscreme.com/mcp -a claude-desktop -n csscreme -g- Where it is written
~/Library/Application Support/Claude/claude_desktop_config.json
Desktop has no project scope: the config is global. On Windows the file is under
%APPDATA%\Claude\. -
Or write it by hand
The same result without running anything, in
~/Library/Application Support/Claude/claude_desktop_config.json:{ "mcpServers": { "csscreme": { "type": "http", "url": "https://csscreme.com/mcp" } } } -
Confirm it connected
Quit and reopen Claude Desktop. The tools icon in the message box should list
csscreme.Then try it. Ask Claude Desktop: “Use csscreme to find a calm fintech dashboard theme, then pull its DESIGN.md.” It should call
search_themes, thenget_design_md.
What Claude Desktop can now do
search_themesFirst call when the user has no design system yet.list_themesWhen the user wants options rather than one answer.get_design_mdBefore writing any UI. Save it at the repo root.get_theme_tokensAfter the components are written and the tokens need to land.how_to_useOnce per project, for the wiring.get_install_commandWhen the user says "install it" and the id is known.get_agent_rulesOnce, so the rules apply every session instead of one message.decode_urlWhen the user says "match the design of <site>", or has fetched a page as markdown and needs what that markdown lost.css_featureBefore writing CSS that uses anything newer than flexbox, so the code is right for today and not for the model's training date.get_design_md_for_urlWhen the user says "match <site>" and you are about to write UI. Save it at the repo root.decode_siteWhen the question is whether a site is really on a design system, rather than what one page happens to use.verify_design_mdAt the start of a session when a DESIGN.md is already present.
The full MCP page, with a live try-it panel, the
limits and the changelog.
Endpoint: https://csscreme.com/mcp