How to Monitor Your SvelteKit Application with Vigilmon

SvelteKit is gaining rapid adoption as a full-stack Svelte framework — combining SSR, SSG, and client-side routing in one clean package. But production SvelteKit apps need the same uptime monitoring as any other web application.

This guide shows you how to add health check monitoring to your SvelteKit app and set up Vigilmon for continuous uptime checks.

Creating a Health Check Endpoint in SvelteKit

SvelteKit's server routes make this straightforward. Create a health endpoint at src/routes/health/+server.ts:

import { json } from '@sveltejs/kit';
import type { RequestHandler } from './$types';

export const GET: RequestHandler = async ({ locals }) => {
  // Check database connectivity if you have one
  try {
    // Example with Prisma
    await locals.db.$queryRaw`SELECT 1`;

    return json({
      status: 'ok',
      timestamp: new Date().toISOString(),
      db: 'connected'
    });
  } catch (error) {
    return json(
      {
        status: 'error',
        timestamp: new Date().toISOString(),
        db: 'disconnected'
      },
      { status: 503 }
    );
  }
};

For simpler apps without a database:

import { json } from '@sveltejs/kit';
import type { RequestHandler } from './$types';

export const GET: RequestHandler = async () => {
  return json({
    status: 'ok',
    version: process.env.APP_VERSION ?? 'unknown'
  });
};

Testing Your Health Endpoint

# During development
curl http://localhost:5173/health

# In production
curl https://your-sveltekit-app.com/health

Expected response:

{
  "status": "ok",
  "timestamp": "2026-08-04T10:00:00.000Z"
}

Connecting to Vigilmon

1. Sign up at vigilmon.online
2. Click Add Monitor
3. Enter URL: https://your-sveltekit-app.com/health
4. Set interval: 1 minute
5. Enable keyword check: verify "status":"ok" is present in the response
6. Add email/Slack/webhook alert

Monitoring SvelteKit on Vercel or Netlify

If you deploy SvelteKit on serverless platforms:

Vercel: Your health endpoint becomes a serverless function. Vigilmon checks it every minute — if the function cold-starts slowly, set a generous response timeout (10-15s) in Vigilmon.

Netlify Functions: Same pattern. Health endpoint becomes a Netlify function. Add X-Robots-Tag: noindex to prevent search engines from indexing /health.

// Add noindex header to health endpoint
export const GET: RequestHandler = async () => {
  return json(
    { status: 'ok' },
    {
      headers: {
        'X-Robots-Tag': 'noindex'
      }
    }
  );
};

What to Monitor Beyond the Health Endpoint

Status Page for Your SvelteKit App

Vigilmon automatically generates a public status page from your monitors. Share it with users so they can self-check during incidents:

https://status.vigilmon.online/your-team

Conclusion

SvelteKit is a fantastic framework — and Vigilmon is the simplest way to know when your SvelteKit app goes down. Add a health endpoint, connect Vigilmon, and you'll get instant alerts with multi-region verification.

Start free at vigilmon.online.