21st.dev for Claude Code

dev.21st/mcp

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

client:Claude Code transport:streamable-http

Install 21st.dev in Claude Code

run in your project directory

claude mcp add --transport http mcp https://21st.dev/api/mcp

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs