# Passkey Sign-In

> A compact sign-in card that lets returning users authenticate with a passkey using Face ID, Touch ID, or a security key, with an option to fall back to a password.

- Author: [felipemenezes098](https://21st.dev/@felipemenezes098)
- License: AGPL-3.0
- Tags: Sign in, Authentication, Login, Passkey, Webauthn
- npm dependencies: lucide-react
- Live preview: https://21st.dev/@felipemenezes098/components/sign-in-4

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/felipemenezes098/sign-in-4?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/sign-in.md