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@21st-dev

21st Labs

21st Labs

We build tools for developers who ship fast and care about craft.

Open Source

ProjectDescription
1codeOrchestration layer for coding agents (Claude Code, Codex)GitHub stars
21st.devnpm for design engineers — largest marketplace of shadcn/ui components, blocks and hooksGitHub stars
Magic MCPMCP server for AI-powered frontend development in Cursor, Windsurf, and ClineGitHub stars
21st SDKThe fastest way to add an AI agent to your app — runtimes, sandboxed execution, streaming, drop-in React componentsGitHub stars
Agent ElementsProduction-ready React components for chat, tools, and AI workflows — a shadcn-style registry of agent UI primitivesGitHub stars

Links

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  1. magic-mcpmagic-mcpPublic

    It's like v0, but in your Cursor / Claude Code / Windsurf: search 10,000+ React/Tailwind components, generate new UI with AI, and publish your own — right from your editor. Magic MCP is now the 21s…

    JavaScript 5.6k 416

  2. clicliPublic

    JavaScript 18 4

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