Use when setting up, troubleshooting, managing, removing, or checking the health of an Auth0 custom authentication domain (e.g. login.example.com), OR when diagnosing an error (400/403/404/409/429) from the /custom-domains Management API — especially Free-tier 403s (credit card on file, not a plan upgrade), self-managed cert 403s, PATCH-type 400s, `operation_not_supported` on `relying_party_identifier`, and 409 domain-already-exists. Handles CNAME creation in the user's DNS provider (Cloudflare, AWS Route 53, Azure DNS automated; other registrars guided), verification polling, Multiple Custom Domains (MCD), default-domain selection, TLS policy, client-IP header, per-domain passkey relying party identifier, and domain metadata.
Use when adding authentication to Expo (React Native) mobile apps — login, logout, user sessions, protected routes, biometrics, or token management. Integrates react-native-auth0 SDK with Expo Config Plugin for native iOS/Android builds. Trigger for any Expo project needing Auth0, including app.json plugin config, custom scheme setup, or credential management. Do NOT use for bare React Native CLI projects (use auth0-react-native), React web apps (use auth0-react), Next.js (use auth0-nextjs), or backend APIs.
Use when adding authentication (login, logout, protected routes) to Fastify web applications - integrates @auth0/auth0-fastify for session-based auth. For stateless Fastify APIs use auth0-fastify-api instead.
Use when adding login, logout, and user profile to a Flask web application using session-based authentication - integrates auth0-server-python for server-rendered apps with login/callback/profile/logout flows.
Use when adding Auth0 authentication to a Flutter mobile application (iOS/Android) — integrates the auth0_flutter SDK (native platform) for Web Auth login/logout via the system browser, with secure credential storage and biometric protection through the CredentialsManager.
Use when adding Auth0 authentication to a Flutter web application — integrates the auth0_flutter SDK (web platform) for browser-based authentication using redirect login, popup login, and credential caching.
Use when adding Auth0 authentication to an Ionic Angular application with Capacitor — integrates @auth0/auth0-angular SDK with Capacitor Browser and App plugins for native iOS/Android deep linking, login, logout, and user profile display.
Use when adding Auth0 authentication to an Ionic Vue application with Capacitor — integrates @auth0/auth0-vue SDK with Capacitor Browser and App plugins for native iOS/Android deep linking, login, logout, and user profile display.
Use when adding Auth0 login, logout, and callback handling to Java Servlet web applications - integrates com.auth0:mvc-auth-commons SDK for server-side Java apps using javax.servlet with session-based authentication. Triggers on AuthenticationController, AuthorizeUrl, Tokens, IdentityVerificationException, Java MVC auth.
Use when adding login, logout, and user profile to a Laravel web application using session-based authentication - integrates auth0/login (laravel-auth0) for guard-based auth with auto-registered routes.
Use when adding Auth0 authentication to .NET MAUI cross-platform applications (iOS, Android, macOS, Windows) - integrates Auth0.OidcClient.MAUI NuGet package for native login, logout, token refresh, and user profile. Trigger on MAUI authentication, add login to MAUI, Auth0 MAUI, .NET MAUI auth, cross-platform mobile auth
Use when adding MFA, 2FA, TOTP, SMS codes, push notifications, passkeys, or when requiring step-up verification for sensitive operations or meeting compliance requirements (HIPAA, PCI-DSS) - covers adaptive and risk-based authentication with Auth0.