Welcome to your new app

Visit the SSR demo page

See how Clerk hydrates the auth state during SSR and CSR, enabling server-side generation even for authenticated pages

Visit a page protected by _middleware

Find out how you can use Nextjs middleware and Clerk stateless auth to protect entire routes at the edge

Sign up for an account

Configure settings for your app

Visit Clerk to manage instances and configure settings for user management, theme, and more

API request example

ResponseYou are signed out, so the request will return null

// Click above to run the request

pages/api/getAuthenticatedUserId.js

import { withAuth } from "@clerk/nextjs/api";

export default withAuth((req, res) => {
  const { sessionId } = req.auth;

  if (!sessionId) {
    return res.status(401).json({ id: null });
  }

  return res.status(200).json({ id: sessionId });
});

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