21st.dev Magic AI Agent

Name: 21st.dev Magic AI Agent
Author: 21st-dev

@21st-dev

Repository Homepage

About 21st.dev Magic AI Agent

It's like v0 but in your Cursor/WindSurf/Cline. 21st dev Magic MCP server for working with your frontend like Magic

Basic information

Config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "magic-mcp": {
      "command": "npx",
      "args": [
        "@21st-dev/cli@latest",
        "install",
        "<client>",
        "--api-key",
        "<key>"
      ]
    }
  }
}

Tools

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Overview

What is 21st.dev Magic AI Agent?

An AI-powered MCP server that creates modern UI components from natural language descriptions. It integrates with Cursor, Windsurf, and VSCode (including Cline) to generate polished, customizable React components in your IDE.

How to use 21st.dev Magic AI Agent?

Generate an API key at 21st.dev Magic Console, then install via one CLI command (npx @21st-dev/cli@latest install <client> --api-key <key>) or manually add an MCP config entry. In your AI Agent’s chat, type /ui followed by a description of the component you need.

Key features of 21st.dev Magic AI Agent

AI-powered UI generation from natural language descriptions.
Multiple IDE integrations (Cursor, Windsurf, VSCode, Cline).
Access to a library of pre-built, customizable components.
Real-time preview of components as you create them.
Full TypeScript support for type‑safe development.
SVGL integration for professional brand assets and logos.

Use cases of 21st.dev Magic AI Agent

Rapidly generate navigation bars, forms, or buttons by describing them.
Add modern UI patterns to an existing project without manual coding.
Prototype UI variations quickly inside your IDE.
Enhance existing components with advanced features (coming soon).

FAQ from 21st.dev Magic AI Agent

How does Magic AI Agent handle my codebase?

It only writes or modifies files related to the components it generates, following your project’s code style and structure without affecting other parts of your application.

Can I customize the generated components?

Yes, all generated components are fully editable with well‑structured code, just like any other React component in your project.

What happens if I run out of generations?

You will be prompted to upgrade your plan if you exceed your monthly limit. Existing components remain fully functional.

Is there a limit to component complexity?

Magic AI Agent can handle components of varying complexity, from simple buttons to complex interactive forms. For best results, break very complex UIs into smaller components.

What runtime or dependencies are required?

Node.js (latest LTS recommended) and one of the supported IDEs (Cursor, Windsurf, or VSCode with Cline). The server only requires an API key from 21st.dev.

Comments

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