21st.dev Magic MCP

為什麼要用

核心特性

v0-style component generation backed by 21st.dev's library
shadcn/ui, Tailwind, and Framer Motion patterns
Refine an existing component in place
Browse 5000+ pre-made components
Free tier with paid scaling

即時演示

實際使用效果

magic-mcp.replay ▶ 就緒

0/0

安裝

選擇你的客戶端

~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "magic-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@21st-dev/magic@latest"
      ]
    }
  }
}

開啟 Claude Desktop → Settings → Developer → Edit Config。儲存後重啟應用。

~/.cursor/mcp.json · .cursor/mcp.json

{
  "mcpServers": {
    "magic-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@21st-dev/magic@latest"
      ]
    }
  }
}

Cursor 使用與 Claude Desktop 相同的 mcpServers 格式。專案級設定優先於全域。

VS Code → Cline → MCP Servers → Edit

{
  "mcpServers": {
    "magic-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@21st-dev/magic@latest"
      ]
    }
  }
}

點擊 Cline 側欄中的 MCP Servers 圖示，然後選 "Edit Configuration"。

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "magic-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@21st-dev/magic@latest"
      ]
    }
  }
}

格式與 Claude Desktop 相同。重啟 Windsurf 生效。

~/.continue/config.json

{
  "mcpServers": [
    {
      "name": "magic-mcp",
      "command": "npx",
      "args": [
        "-y",
        "@21st-dev/magic@latest"
      ]
    }
  ]
}

Continue 使用伺服器物件陣列，而非映射。

~/.config/zed/settings.json

{
  "context_servers": {
    "magic-mcp": {
      "command": {
        "path": "npx",
        "args": [
          "-y",
          "@21st-dev/magic@latest"
        ]
      }
    }
  }
}

加入 context_servers。Zed 儲存後熱重載。

claude mcp add magic-mcp -- npx -y @21st-dev/magic@latest

一行命令搞定。用 claude mcp list 驗證，claude mcp remove 移除。

使用場景

實戰用法： 21st.dev Magic MCP

Generate a polished landing-page hero in under a minute

👤 Frontend engineers shipping fast ⏱ ~15 min intermediate

何時使用： You need a hero section right now and don't want to start from a blank file.

前置條件

Server/skill installed and authenticated — See repo README

步驟

Search for inspiration

Search 21st for hero sections that mix gradient + product screenshot.✓ 已複製

→ 5–10 starter components
Generate the final one

Create a Hero component: dark gradient bg, headline 'Ship faster.' subhead 'AI for serious teams.' a primary CTA + secondary CTA, social proof row.✓ 已複製

→ A complete tsx file using shadcn primitives

結果： A real production-shape component in one prompt.

注意事項

Generated components assume shadcn primitives are installed — Generated components assume shadcn primitives are installed — run npx shadcn add button card first.

搭配使用： filesystem · flyonui-mcp

組合

與其他 MCP 搭配，撬動十倍槓桿

magic-mcp + filesystem

Pair with filesystem for complementary capabilities

Use this server together with filesystem to complete a multi-step task.✓ 已複製

magic-mcp + flyonui-mcp

Pair with flyonui-mcp for complementary capabilities

Use this server together with flyonui-mcp to complete a multi-step task.✓ 已複製

工具

此 MCP 暴露的能力

工具	輸入參數	何時呼叫	成本
create_component	description, framework	Need a new UI component	21st credits
refine_component	component_code, instruction	Tweak an existing component	21st credits
search_components	query	Find a pre-made starting point	1 API call

成本與限制

運行它的成本

API 配額: See provider docs for rate limits
每次呼叫 Token 數: Varies by tool
費用: See repo README for pricing details
提示: Cache tool results and avoid repeated identical calls.

安全

權限、密鑰、影響範圍

憑證儲存： Use environment variables; never commit secrets

資料出站： Tool calls go to the provider's API as documented

故障排查

常見錯誤與修復

API key invalid

Get a key at 21st.dev/settings/api and set TWENTY_FIRST_API_KEY.

驗證： search_components returns results

component uses missing shadcn import

Run npx shadcn add <component> for each unresolved import.

驗證： Vite/Next builds cleanly

替代方案