Clerk Auth Monitoring: Middleware Latency, Webhooks, and Uptime

Monitoring Clerk Auth Integration

Clerk handles auth infrastructure, but your integration needs observability.

Track Middleware Latency

export default clerkMiddleware(async (auth, req) => {
  const start = Date.now();
  const { userId } = await auth();
  const duration = Date.now() - start;
  if (duration > 100) {
    console.warn('clerk_auth_slow: ' + duration + 'ms on ' + req.nextUrl.pathname);
  }
});

Webhook Delivery

export async function POST(req: Request) {
  try {
    const evt = wh.verify(await req.text(), getHeaders(req));
    await syncUser(evt);
    return new Response('OK', { status: 200 });
  } catch (err) {
    console.error('webhook_failed');
    return new Response('Error', { status: 400 });
  }
}

Health Check

export async function GET() {
  return Response.json({ status: 'ok', clerk: !!process.env.NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY });
}

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Alert Priorities

• Auth check latency above 200ms
• Webhook failure rate above 1%
• Clerk status page incidents