21st.dev MCP (search 12k+ community components) vs similar

4 options side by side. Our @design-infra pieces render live under the design system you choose; upstream pieces show their live demo where the host allows embedding, otherwise a screenshot with a link to the real thing. Pick or pass, then copy the feedback for your agent.

• A21st.dev MCP (search 12k+ community components)21stimage
  

  Open live demo
  keyTechnicalTrustworthy

  Free tier: search + limited daily installs. Install a found item with: npx shadcn@latest add "https://21st.dev/r/<author>/<slug>?api_key=$API_KEY_21ST".

  $npx @21st-dev/cli@latest init --client claude

  Gallery pageOpen live demo

  Pick PassAdd to shortlist
• BDesign lab (temporary option board)oclive

  Design lab · temporary

  Request access button

  Three takes on the primary CTA in the hero. Hover and click each one.

  Try each option, then tell your agent which one you want — e.g. go with B or A, but with C's hover. It will apply it and delete this page.

  ACurrent

  Request access

  BArrow nudgeChosen

  Request access

  COutline + press

  Request access
  drop-inMinimalTechnical

  Temporary page an agent installs in a consumer project to render candidate variants of the user's own component side by side, with their theme and content: <DesignLab title> + <LabOption id label notes chosen>. Lands at app/design-lab/page.tsx + components/design-lab.tsx; the user says which option they want, the agent applies it and removes both files.

  $npx shadcn@latest add @design-infra/design-lab

  Gallery pageOpen live demo

  Pick PassAdd to shortlist
• CAgentation toolbaragentationimage
  

  Open live demo
  Technical

  Mount <Agentation /> only in development (see skills/setup-project). Free for internal use; commercial license only if you redistribute it in a product.

  $pnpm add -D agentation && claude mcp add agentation -- npx -y agentation-mcp server

  Gallery pageOpen live demo

  Pick PassAdd to shortlist
• DAnatomy · Isometric explainer skillanatomyimage
  No preview yetOpen live demo ↗
  TechnicalRefinedPlayful

  MIT. Optional tier 3 skill, compatible with Claude Code and Codex. Needs Node 20.10+ and Chrome/Chromium. Existing figures install separately with pnpm add anatomy-figures. Custom models require factual and visual review; large figures may take substantial time.

  $DISABLE_TELEMETRY=1 npx -y skills@latest add wheresryan22/anatomy --skill anatomy -a claude-code codex -y

  Gallery pageOpen live demo

  Pick PassAdd to shortlist

From design-infra compare — 21st.dev MCP (search 12k+ community components) vs similar:
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Compare: https://www.owencoonahan.xyz/design-infra/compare?ids=21st/magic-mcp,oc/design-lab,agentation/agentation,anatomy/anatomy-skill&theme=editorial&label=21st.dev+MCP+%28search+12k%2B+community+components%29+vs+similar