serafimcloud/21st

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

5423 stars · 313 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

21st.dev is an open-source community registry and marketplace of React UI components built with Tailwind CSS and Radix UI, following shadcn/ui conventions. Components are published, discovered, and installed as copyable source code via npx shadcn or AI coding tools, with MCP support for component code retrieval.

Use cases

• find react tailwind components for my app
• install shadcn-style ui components with npx
• publish my react component to a community registry
• get ui component code into claude code or cursor via mcp
• browse hero sections and marketing blocks for a landing page
• find animated react components with demos

When to choose

• you build React apps with Tailwind CSS and want modern, copy-paste components
• you want a shadcn/ui-compatible registry with a large community catalog
• you want component source code you fully own and can edit
• you use AI coding tools and want components delivered as prompts or via MCP

When to avoid

• you need framework-agnostic or non-React components
• you prefer traditional npm packages with versioned dependencies rather than copied source
• your project doesn't use Tailwind CSS or Radix UI conventions
• you need guaranteed long-term maintenance of every component, since quality varies by community author

Facets

library · maturity active

ui-components frontend-framework css-framework package-manager mcp web-development frontend web-design developer-tools browser shadcn-ui tailwindcss react-components component-registry component-marketplace design-engineering radix-ui copy-paste-components ai-code-generation web nodejs typescript

Member repositories

For agents

markdown · JSON · MCP: product_card(name="serafimcloud/21st")