Nostr Authenticator is a mobile application that allows you to securely
sign authentication requests using your Nostr keys, directly on your device.

The app is built as a secure companion for passwordless login systems,
where authentication is performed by cryptographically signing one-time
challenges — without passwords, emails, or centralized accounts.

Key features:

Secure signing of authentication challenges
NIP-07 compatible message signing
Support for multiple Nostr accounts
Local key storage protected by biometrics
Private keys never leave your device
Works with browser extensions and Nostr DM-based authentication flows

Nostr Authenticator allows you to authenticate using your npub or NIP address
and approve login requests either directly from a browser extension or by
replying to a challenge received via a Nostr direct message.

Designed with privacy, security, and user-owned identity in mind.
You can test the application at https://it.botrift.com

This is how passwordless login should work.