21st.dev Magic + mcphub.nvim: 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 mcphub.nvim, 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 mcphub.nvim, 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 mcphub.nvim
• 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
• mcphub.nvim installed and configured
• Compatible operating system (Neovim)

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 mcphub.nvim

1. Locate your configuration file:

   • Windows: %LOCALAPPDATA%\mcphub\servers.json
   • macOS: ~/.config/mcphub/servers.json
   • Linux: ~/.config/mcphub/servers.json

2. Add server configuration:

{
  "mcpServers": {
    "21stdev-magic": {
      "command": "21st.dev magic",
      "args": [],
      "env": {
        "API_KEY": "your-21st-dev-api-key"
      }
    }
  }
}

3. Restart mcphub.nvim

Completely quit and restart mcphub.nvim to load the new configuration.

Examples

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

Create Navigation Bar

Generate a modern responsive navigation component

Ask mcphub.nvim: "/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 mcphub.nvim: "/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 mcphub.nvim: "/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 mcphub.nvim: "/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 mcphub.nvim
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

Servers not showing in :McpHub

Symptoms: Empty server list, Configuration not loaded

Cause: Incorrect configuration file path or JSON syntax error

Solution:

• Verify servers.json exists in ~/.config/mcphub/ or .vscode/mcp.json in project root
• Check JSON syntax for errors (trailing commas, missing quotes)
• Run :checkhealth mcphub to diagnose issues

Tool execution fails

Symptoms: Error message when AI tries to use tool, No response

Cause: Server command failed or environment variables missing

Solution:

• Check server logs in :McpHub
• Verify "command" path is correct and executable
• Ensure required environment variables are set in the config

Chat plugin not recognizing tools

Symptoms: AI says it cannot perform the action, Tools not listed in chat

Cause: Integration issue with the specific chat plugin

Solution:

• Ensure you are using a supported version of the chat plugin
• Check mcphub.nvim documentation for plugin-specific setup instructions
• Restart Neovim to reload the integration

21st.dev Magic not appearing in mcphub.nvim

Symptoms: Server not listed, Tools not available

Cause: Configuration or installation issue

Solution:

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

Next Steps

Now that 21st.dev Magic is integrated with mcphub.nvim:

• Explore all 21st.dev Magic capabilities through mcphub.nvim
• Check out other MCP servers that work with mcphub.nvim
• 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 mcphub.nvim MCP guide
• Join the MCP community discussions