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How to set up Clerk authentication with passkeys in Next.js 16 App Router?

November 28, 2025

Clerk handles passkeys natively; wrap app in <ClerkProvider>, use middleware for protected routes.

Example:-

Step 1: Install Package

Code

npm i @clerk/nextjs

Step 2: Environment Variables (.env.local)

Code

NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY=pk_test_xxx
CLERK_SECRET_KEY=sk_test_xxx
NEXT_PUBLIC_CLERK_SIGN_IN_URL=/sign-in
NEXT_PUBLIC_CLERK_SIGN_UP_URL=/sign-up

Step 3: Root Layout (app/layout.tsx)

Code

import { ClerkProvider } from '@clerk/nextjs';

export default function RootLayout({
  children,
}: {
  children: React.ReactNode;
}) {
  return (
    <ClerkProvider publishableKey={process.env.NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY!}>
      <html lang="en">
        <body>{children}</body>
      </html>
    </ClerkProvider>
  );
}

Step 4: Middleware (middleware.ts)

Code

import { authMiddleware } from '@clerk/nextjs/server';

export default authMiddleware({
  publicRoutes: ['/']
});

export const config = {
  matcher: ['/((?!.+\\.[\\w]+$|_next).*)', '/', '/(api|trpc)(.*)']
};

Step 5: Protected Page (app/dashboard/page.tsx)

Code

import { UserButton, currentUser } from '@clerk/nextjs/server';

export default async function Dashboard() {
  const user = await currentUser();
  return (
    <div>
      <h1>Welcome {user?.firstName}</h1>
      <UserButton afterSignOutUrl="/" />
    </div>
  );
}

Step 6: Enable Passkeys (Clerk Dashboard > Authentication > Passkeys > Enable).

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