21st.dev Magic
AI UI component generator: describe it in words, get production React + Tailwind code.
About
21st.dev Magic is an MCP (Model Context Protocol) server that generates modern UI components from natural-language descriptions. Type /ui create a modern navigation bar with dark mode toggle in your AI IDE chat and it searches 21st.dev's component library — described as "npm for design engineers," with 12,000+ community and official components, themes, and SVG brand logos — then generates a polished React + Tailwind component and adds it to your project.
The ecosystem includes the @21st-dev/cli installer (Cursor, Windsurf, Cline, Claude Code), a VS Code extension with DOM selection, design-context management (.21st/design.json), and a local UI code-review mode. Components are copied as source you own, shadcn/ui-style, with zero runtime dependency on the registry. Limitations: requires an API key from the Magic console; generated components still need review for accessibility and design-system fit; and output quality depends on how well the prompt describes the target.
What it can do
- Natural-language UI component generation via /ui
- Search 12,000+ registry components, themes, and logos
- Project-aware variants with design-context rules
- Copy-as-source output: React + Tailwind + TypeScript
Setup
Run npx @21st-dev/cli@latest install and select your IDE, or add @21st-dev/magic to your MCP config with an API key.
Prerequisites
Node.js; a 21st.dev API key; an MCP-compatible IDE or agent.
Use cases
Works with
Trust score — 8/10
Scored 8/10 (verified tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 69; Trending score 82/100 from researcher assessment.
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.