Next.js+Clerk Auth
Stack IntegrationNext.js + Clerk Auth Integration Guide
Clerk provides complete user management for Next.js App Router — hosted sign-in UI, session management, and organization support — with middleware that protects routes in a single configuration file.
Use Cases
- Protected routes in Next.js App Router using Clerk middleware
- Server Components accessing the current user without additional API calls
- Multi-tenant organization management with Clerk Organizations
- Social login (Google, GitHub, Apple) added without custom OAuth implementation
Implementation
Install `@clerk/nextjs` and wrap the root layout with `<ClerkProvider>`. Configure `middleware.ts` using Clerk's `authMiddleware` to define public routes and protect everything else by default. In Server Components, use `auth()` from `@clerk/nextjs/server` to access the user ID without a client round-trip. For multi-tenant apps, Clerk Organizations provide a built-in org switcher and per-org roles — pair with Supabase RLS using the Clerk user ID as the tenant identifier.