21st.dev for Claude.ai
dev.21st/mcp
Find UI components and themes, retrieve code, and generate with hosted 21st AI when enabled.
client:Claude.ai
transport:streamable-http
Install 21st.dev in Claude.ai
Settings → Connectors → Add custom connector
https://21st.dev/api/mcpClaude on the web takes a remote URL and completes OAuth in the browser. For a packaged server use Claude Desktop or Claude Code instead. Claude.ai docs