---
title: "21st"
description: "A living library of React components, templates, and themes. Add them to the project, or generate new UI."
canonical: https://agentpluginsdirectory.com/plugins/21st
last-updated: 2026-10-25
---

# 21st
A living library of React components, templates, and themes. Add them to the project, or generate new UI.
- Slug: 21st
- Publisher: 21st
- Repository: https://github.com/reforma-dev/plugins
- Manifest: marketplace/ui/21st/plugin.json
- Category (editorial): other
- Skills: 1 (21st)
- MCP servers: 1 (21st)
- Stars: 0
- Listing: https://agentpluginsdirectory.com/plugins/21st
- Schema: https://agent-plugins.org/schemas/1.0.0/plugin.schema.json

## Skills

- 21st: Searches and installs UI from the 21st.dev catalog. Use when the user wants a 21st component, theme, or template, or a marketplace block that is not in local components/ui or an installed kit registry.

Descriptions come from the frontmatter of each SKILL.md, punctuation lightly normalized.

## MCP servers

- 21st: transport: http; url: https://21st.dev/api/mcp

Read from the plugin's own mcp.json. Environment variable names only, never values.