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21st.dev

dev.21st/mcpVersion 1.0.1

Find UI components and themes, retrieve code, and generate with hosted 21st AI when enabled.

Status

Sign-in required74 msReachable. It asks for authorization, so we did not look inside.

Registry data may be out of date

We could not refresh it, so this page shows the last copy.
Last checked
Nov 14, 2026, 14:24 UTC
Latency
74 ms
Remotes responding
1 of 1
Sign-in
OAuth sign-in
Hosting
Hosted outside the EU (detected)
Registry data as of
Nov 14, 2026, 21:12 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP
https://21st.dev/api/mcpSign-in required74 ms
OAuth sign-in

Claude Code

This server asks for sign-in. Your client opens the sign-in when it connects.

claude mcp add --transport http 21st https://21st.dev/api/mcp --header 'x-api-key: <YOUR_X_API_KEY>'

Replace <YOUR_X_API_KEY> before running.

Claude Desktop and claude.ai

Settings > Connectors > Add custom connector
Name: 21st
Remote MCP server URL: https://21st.dev/api/mcp
This server expects the header x-api-key.

Cursor

{
  "mcpServers": {
    "21st": {
      "url": "https://21st.dev/api/mcp",
      "headers": {
        "x-api-key": "<YOUR_X_API_KEY>"
      }
    }
  }
}

Replace <YOUR_X_API_KEY> before running.

VS Code

code --add-mcp '{"name":"21st","type":"http","url":"https://21st.dev/api/mcp","headers":{"x-api-key":"<YOUR_X_API_KEY>"}}'

Replace <YOUR_X_API_KEY> before running.

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Tools

Tools are visible after sign-in; we do not look inside protected servers.

Details

Registry status
Active
Published
Sep 9, 2026
Updated
Sep 9, 2026
Website
https://21st.dev/mcp⁠ (opens in a new tab)
Repository
Not given
Categories
Uncategorized
GDPR
Not declared

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