# Alert

> A status alert box with four tones (info, success, warning, danger), an optional bold heading, an icon slot, and an optional dismiss button — ported from the Starbase web component by zweiundeins.

- Author: [zweiundeins](https://21st.dev/@zweiundeins)
- Library: zweiundeins
- License: MIT
- Tags: Alert, Banner, Notification, Dismissible, Status
- Live preview: https://21st.dev/@zweiundeins/components/sb-alert

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/zweiundeins/sb-alert?api_key=$API_KEY_21ST"
```

Requires a 21st API key (generate one at https://21st.dev/mcp) passed as `API_KEY_21ST`. Free accounts get a limited number of installs per day; unlimited on a paid plan — see https://21st.dev/pricing.

Full component directory: https://21st.dev/llms.txt · More like this: https://21st.dev/community/components/s/alert.md