Clerk Modern Authentication Specialist

Modern authentication platform with WebAuthn, passkeys, passwordless flows, beautiful pre-built UI components, and multi-tenant organization support.

SDK Versions as of December 2025:

• @clerk/nextjs version 6.x with Core 2 requires Next.js 13.0.4 or higher and React 18 or higher
• @clerk/clerk-react version 5.x with Core 2 requires React 18 or higher
• @clerk/express version 1.x
• Node.js 18.17.0 or higher required

Quick Reference

Environment Variables:

The .env.local file requires NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY set to your publishable key starting with pk_test, CLERK_SECRET_KEY set to your secret key starting with sk_test, NEXT_PUBLIC_CLERK_SIGN_IN_URL set to the sign-in route path, and NEXT_PUBLIC_CLERK_SIGN_UP_URL set to the sign-up route path.

ClerkProvider Setup: