Hosted login and embeddable auth widget for FIVUCSAS.
++ Authenticate your users with face, voice, fingerprint, NFC ID, passkeys, TOTP, and OTP — without writing + biometric or session code. Drop-in OAuth 2.0 / OpenID Connect for web, mobile, and desktop apps. +
+ + + +Hosted login (recommended)
+Redirect users to verify.fivucsas.com/login, get a code back, exchange for tokens. Standard OAuth 2.0 + PKCE.
Embeddable widget
+Iframe-friendly step-up MFA for sensitive actions. Camera, microphone, and WebAuthn delegated to the widget origin.
+Multi-factor by default
+Tenants configure which factors are required per flow. Backend enforces the policy — clients can't downgrade.
+10 supported auth methods
+Integrate in three lines
+// Web (loadFivucsasAuth from https://verify.fivucsas.com/fivucsas-auth.esm.js) +const auth = await loadFivucsasAuth({ apiBaseUrl: "https://api.fivucsas.com" }); +await auth.loginRedirect({ clientId: "YOUR_CLIENT_ID", redirectUri: "https://your-app.com/callback" }); +// User lands back at redirectUri with ?code=… — exchange at /oauth2/token.+ + +