auth0

Use when adding, fixing, or improving how an app authenticates users or protects an API, or when using or configuring any Auth0 feature — signing users in and out, sessions and tokens, guarding routes and endpoints, MFA, passwordless passkey login (WebAuthn), SSO, Organizations, RBAC, custom domains, Universal Portals for hosted account and organization self-service, or Universal Login branding. Also use to audit a tenant's health, security, and plan fit (CheckMate), to debug why an auth flow fails, to migrate from another auth provider, or to set up the Vercel native integration. Covers any web, mobile, or backend framework and every Auth0 SDK, tool, and API. Use even if the user never mentions Auth0.

Use when adding Auth0 authentication to any app and unsure which SDK or skill to use. Detects the project's framework and routes to the right setup workflow — use this as the entry point even if the user just says "add login to my app" or "set up Auth0" without naming a framework.

Use when adding Auth0 login, logout, protected pages, or middleware to a Next.js application. Supports App Router and Pages Router with @auth0/nextjs-auth0 — use even if the user says "add login to my Next.js app" or "protect my Next.js routes".

Use when adding Auth0 login, logout, protected routes, or user sessions to a React SPA. Integrates @auth0/auth0-react — use even if the user says "add login to my React app" or "protect my React routes" without naming the SDK.

Use when adding Auth0 login, logout, or biometric auth to a bare React Native app (not Expo). Integrates react-native-auth0 with native deep linking.

Use when adding session-based login, logout, or protected routes to an Express.js web application. Integrates express-openid-connect — use even if the user says "add login to my Express app" or "protect my Express routes".

Use when adding MFA or step-up authentication to an app — requiring users to verify with a second factor (TOTP, SMS, passkey, push) for login or before a sensitive action. Also use for adaptive/risk-based MFA or compliance requirements like HIPAA or PCI-DSS, even if the user just says "add two-factor auth" or "require MFA before this action".

Use when adding Auth0 login, logout, route guards, or HTTP interceptors to an Angular application. Integrates @auth0/auth0-angular for SPAs — use even if the user says "protect my Angular routes" or "add authentication to Angular" without naming the SDK.

Use when adding Auth0 login, logout, protected routes, or user sessions to a Vue 3 SPA. Integrates @auth0/auth0-vue — use even if the user says "add login to my Vue app" or "protect my Vue routes" without naming the SDK.

Use when migrating users or authentication from another provider (Firebase, Cognito, Supabase, Clerk, or custom auth) to Auth0. Covers bulk user import, gradual migration strategies, and updating JWT validation — use even if the user says "switch our auth to Auth0" or "move our users to Auth0".

Use when adding Auth0 login, logout, session management, or protected routes to a Nuxt 3 or Nuxt 4 application. Integrates @auth0/auth0-nuxt — use even if the user says "add login to my Nuxt app".

Use when protecting Fastify API endpoints with JWT Bearer token validation or scope checks. Integrates @auth0/auth0-fastify-api for stateless APIs receiving access tokens from frontends or mobile apps.

Use when adding Auth0 login, logout, or session management to an Expo app. Integrates react-native-auth0 with the Expo Config Plugin for native iOS/Android builds — use even if the user says "add login to my Expo app" without mentioning the SDK. Do not use for bare React Native CLI projects.

Use when adding session-based login, logout, or protected routes to a Fastify web application. Integrates @auth0/auth0-fastify — use even if the user says "add login to my Fastify app". For Fastify APIs validating Bearer tokens, use auth0-fastify-api instead.

Use when protecting ASP.NET Core Web API endpoints with JWT Bearer token validation, scope checks, or DPoP binding. Integrates Auth0.AspNetCore.Authentication.Api for stateless REST APIs receiving access tokens from frontends or mobile apps.

Use when adding Auth0 login, logout, or credential management to an Android app in Kotlin or Java. Covers Web Auth, biometric-protected CredentialsManager, and MFA — even if the user just says "add login to my Android app" without mentioning Auth0. Integrates com.auth0.android:auth0.

Use when adding Auth0 login, logout, or biometric-protected credential storage to an iOS, macOS, tvOS, watchOS, or visionOS app. Integrates Auth0.swift — use even if the user says "add login to my iOS app" or "add login to my Swift app".