# AI Sources

> A collapsible citations panel that lists AI response sources with favicons, titles, hostnames, and snippets, used for RAG or search-result attribution.

- Author: [Cameron Kelliher](https://21st.dev/@elements-)
- Library: @elements
- License: MIT
- Tags: AI, Citation, Collapsible, Rag
- npm dependencies: lucide-react, @radix-ui/react-collapsible
- Live preview: https://21st.dev/@elements-/components/sources

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/elements-/sources?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/ai.md