Marmo UI

What Marmo UI is

Marmo UI is an open-source React design system paired with a hosted MCP server for AI agents composing dashboards and apps in a project's style. It provides live component APIs, composition patterns, and generation rules for named @marmoui/ui components. Its library includes more than 50 production-ready UI components, with a Figma library and Storybook. Generated files pass through an MCP review step that checks for incorrect imports, invented props, and broken compositions. Developers install the React package as @marmoui/ui using npm. Pro supports on-brand generation from a DESIGN.md file containing details such as brand colors, typography, tokens, and component overrides. Its install guide documents connections for Claude Code, Codex, Cursor, Gemini CLI, Windsurf, and other MCP clients. The free tier includes core components under the MIT license, documentation, Storybook, and a Figma library; it also allows unlimited projects, commercial use, and no rate limits. Generated code belongs to the user, uses their own LLM tokens, and lives in their repository, according to the pricing FAQ. Pro costs $9.99 a month, and a 14-day trial is available.