What is the key difference between 21st.dev and Mcp?

21st.dev belongs to the Developer Tools category with cloud HTTP/SSE execution, while Mcp belongs to the Developer Tools category with local stdio execution.

How do I install 21st.dev or Mcp in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are 21st.dev and Mcp free or paid?

21st.dev operates under a Free / Open Source model (No auth required). Mcp operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

21st.dev lists 0 tools with 0 views and 0 GitHub stars. Mcp lists 0 tools with 0 views and 20 GitHub stars.

Can I use both 21st.dev and Mcp together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

How do I install 21st.dev or Mcp in Claude Desktop, Cursor, or Windsurf?

Both servers follow the standard Model Context Protocol configuration format. Simply copy the JSON block from the configuration section above and paste it into your AI client's mcpServers configuration object (for instance in claude_desktop_config.json or ~/.cursor/mcp.json ), then completely restart or refresh the application.

Are 21st.dev and Mcp free to use, or do they require API keys?

21st.dev is listed under a Free / Open Source model with No auth required . Mcp operates under a Free / Open Source model with No auth required . If environment variables are required (such as API keys), be sure to define them under the env key in your MCP client's configuration file.

Can I run both 21st.dev and Mcp at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both 21st-dev and mcp-54 as distinct keys inside the single mcpServers object in your configuration file. Your AI assistant will automatically select and call the appropriate tool from either server during chat sessions.

Which MCP server has higher directory engagement and quality ratings?

On AllMCPs, 21st.dev has a Quality Score of 30 /100 ( Emerging ) with 0 views, 0 installs, and 0 GitHub stars. Mcp holds a Quality Score of 48 /100 ( Fair ) with 0 views, 0 installs, and 20 GitHub stars.

Side-by-Side Model Context Protocol Comparison

21st.dev vs Mcp

In-depth architectural comparison of the 21st.dev and Mcp MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

21st.dev

Developer Tools · Remote HTTP/SSE

Quality: 30/100 (Emerging) | Auth: No auth required

Mcp

Developer Tools · Local stdio

Quality: 48/100 (Fair) | Auth: No auth required

Verdict Summary: Choose 21st.dev if you need specialized Developer Tools tools running via a hosted cloud SSE transport. Choose Mcp if your workspace requires Developer Tools integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose 21st.dev when:

You need dedicated capabilities in the Developer Tools domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore 21st.dev Details

Choose Mcp when:

You need dedicated capabilities in the Developer Tools domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore Mcp Details

Feature & Specification Comparison

Specification	2 21st.dev Developer Tools	M Mcp Developer Tools
Summary	Search 21st.dev UI components & themes, get their code, and generate new ones with 21st AI.	Workix hub catalog plus freelance digest/search and proposal helpers for AI agents
Category & Scope	Developer Tools	Developer Tools
Quality signal

Tools & Capabilities Breakdown

21st.dev Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

Mcp Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

21st.dev Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "21st-dev": {
      "url": "https://21st.dev/mcp"
    }
  }
}

Mcp Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "mcp-54": {
      "command": "npx",
      "args": [
        "-y",
        "@workix/mcp"
      ]
    }
  }
}

Frequently Asked Questions

21st.dev is categorized under Developer Tools and uses a remote streaming HTTP/SSE transport. In contrast, Mcp belongs to Developer Tools using local stdio subprocess. Select 21st.dev when you need capabilities focused on developer tools and Mcp when you require tools for developer tools.

More alternatives to 21st.dev More alternatives to Mcp Developer Tools category hub