21st.dev Magic + Cursor: Complete MCP Integration

21st.dev Magic is a MCP server that Create crafted UI components inspired by the best 21st.dev design engineers..

When integrated with Cursor, you can:

• Generate crafted UI components using AI design patterns
• Live preview of generated components
• Full TypeScript support for generated components

This guide provides step-by-step instructions to set up 21st.dev Magic in Cursor, including configuration, examples, and troubleshooting.

What You'll Achieve

After completing this setup:

• 21st.dev Magic will be fully integrated and operational
• You can use 21st.dev Magic tools directly in Cursor
• All 21st.dev Magic capabilities will be available for your workflows
• Access to 4 different tools

Prerequisites

Before starting, ensure you have:

• 21st.dev account
• API key
• 21st.dev Magic API key for authentication
• Cursor installed and configured
• Compatible operating system (Windows, macOS, Linux)

Installation

Step 1: Install 21st.dev Magic

Manual installation steps:

1. Generate API key from 21st.dev Magic Console
2. Add configuration to IDE-specific JSON config
3. Restart IDE to load MCP server

Configuration

Step 2: Configure Cursor

1. Open Cursor settings
2. Navigate to MCP server configuration
3. Add 21st.dev Magic server with appropriate settings
4. Save and restart if needed

Examples

Once configured, you can use 21st.dev Magic in Cursor:

Create Navigation Bar

Generate a modern responsive navigation component

Ask Cursor: "/ui create a modern navigation bar with responsive design"

Expected Result: Responsive navigation component with mobile menu, logo placement, and styling

Generate Dashboard Card

Create a dashboard card with metrics display

Ask Cursor: "/ui design a dashboard card showing user analytics with charts"

Expected Result: Card component with chart integration, metrics display, and responsive layout

Build Form Component

Create a contact form with validation

Ask Cursor: "/ui create a contact form with validation and modern styling"

Expected Result: Form component with input validation, error states, and submit handling

Design Landing Hero

Generate a landing page hero section

Ask Cursor: "/ui build a hero section for a SaaS product with CTA buttons"

Expected Result: Hero component with headline, description, call-to-action buttons, and background

Testing Your Setup

1. Launch Cursor
2. Verify 21st.dev Magic is available in the tools list
3. Test basic 21st.dev Magic functionality

Troubleshooting

Common Issues

API Key Invalid

Symptoms: Authentication errors, Access denied messages, Server connection failures

Cause: Invalid or expired API key

Solution:

• Generate new API key from 21st.dev Magic Console
• Update API_KEY in IDE configuration
• Restart IDE to reload configuration

IDE Not Detecting MCP Server

Symptoms: MCP commands not available, Server not listed in IDE

Cause: Incorrect configuration file or location

Solution:

• Verify config file is in correct location for your IDE
• Check JSON syntax in configuration file
• Restart IDE after configuration changes
• Use CLI installation for automatic setup

Component Generation Fails

Symptoms: Empty responses, Error messages during generation

Cause: Network issues or service limitations

Solution:

• Check internet connectivity
• Verify API key has sufficient quota
• Try simpler prompts initially
• Contact support if issues persist

TypeScript Errors in Generated Code

Symptoms: Type errors, Compilation failures

Cause: Missing dependencies or type definitions

Solution:

• Install required TypeScript dependencies
• Update @types packages
• Configure TypeScript strict mode properly
• Import necessary type definitions

Installation Problems

Symptoms: Cursor fails to install, Application won't start

Cause: System requirements not met or corrupted download

Solution:

• Check minimum system requirements
• Re-download installer from official website
• Run installer as administrator (Windows)
• Check available disk space and permissions

MCP Settings Not Found

Symptoms: No MCP option in settings, Missing configuration section

Cause: Feature not available in current Cursor version

Solution:

• Update Cursor to latest version
• Check if MCP support is enabled in your subscription
• Look for "Extensions" or "Integrations" section instead
• Contact Cursor support for feature availability

Server Configuration Fails

Symptoms: Settings not saving, Configuration errors

Cause: Invalid server path or configuration parameters

Solution:

• Verify server executable path is correct
• Check server installation and permissions
• Use absolute paths instead of relative paths
• Test server command from system terminal first

AI Assistant Not Using MCP Tools

Symptoms: Tools available but AI not using them, Limited functionality

Cause: AI assistant not properly configured for MCP integration

Solution:

• Restart Cursor after configuration changes
• Check AI assistant settings for tool permissions
• Verify MCP server is running and responding
• Try explicitly asking AI to use specific tools

21st.dev Magic not appearing in Cursor

Symptoms: Server not listed, Tools not available

Cause: Configuration or installation issue

Solution:

• Verify configuration syntax
• Check 21st.dev Magic installation
• Restart Cursor
• Check logs for error messages

Next Steps

Now that 21st.dev Magic is integrated with Cursor:

• Explore all 21st.dev Magic capabilities through Cursor
• Check out other MCP servers that work with Cursor
• Join the MCP community for tips and support
• Consider contributing to 21st.dev Magic development

Need Help?

• Search for 21st.dev Magic documentation
• Check the Cursor MCP guide
• Join the MCP community discussions