Monitoring · updated 2026-11-03

Can you vibe code an uptime monitor like UptimeRobot?

Medium: Yes, with care Yes for a personal monitor of a handful of sites, but the hard part is making sure the monitor itself never goes down silently.

3–8 h

MVP build time

$0–$35/mo

Your running cost

$10/mo

UptimeRobot Solo

up to $120

Saved per year

The honest verdict

Sending an HTTP request on a schedule and emailing yourself on failure is a one-evening project. What you pay a monitoring service for is independence: checks from several regions, confirmation before alerting, and a monitor that does not share an outage with the thing it watches. If you build your own, run it on different infrastructure from your app and add a dead man's switch so silence is noticed.

UptimeRobot is checks your websites and APIs every few minutes and alerts you by email, SMS or chat when they go down. This page is about building your own version for personal or internal use, or to learn how this kind of product works, not about copying UptimeRobot to compete with it. How we grade.

What's easy and what's hard

Easy with AI

A dashboard listing monitors with status, last check and response time
Scheduled HTTP checks with status code and keyword assertions
Email or Slack and Discord webhook alerts on state change
Response time charts from stored check results
SSL certificate expiry checks

Hard (where AI won't save you)

Avoiding false alarms: retries and confirmation from a second region before alerting
Keeping the monitor up when your main hosting provider has an outage
Reliable SMS and phone call alerts, which cost money per message
Precise scheduling at 30 to 60 second intervals without drift or overlapping runs
Escalation and on-call rotations for a team

UptimeRobot feature checklist

Difficulty is for a solo builder using an AI coding tool. Skip means not worth building yourself.

Feature	Difficulty	Why
HTTP(S) checks with status code and keyword match	Easy	A cron-triggered function that fetches each URL with a timeout and stores the result.
Email and webhook alerts on down and recovery	Easy	Alert only on state change, not on every failed check, or you will spam yourself.
Response time history and uptime percentage	Easy	Store results in Postgres and aggregate per day so the table stays small.
SSL and domain expiry warnings	Easy	Read the certificate's notAfter date during the check and warn 14 days ahead.
Multi-region confirmation	Medium	Run checks from two providers or regions and alert only when both agree.
Heartbeat (cron job) monitoring	Medium	Give each job a secret ping URL and alert when a ping is late; needs a grace period.
SMS and voice alerts	Medium	Twilio or similar works, but you pay per message and must handle failures and opt-outs.
Public status page	Easy	A read-only page generated from the same data; host it away from your app.
Team on-call rotations and escalation	Skip	Use a dedicated incident tool if a team depends on it.

Build time and running costs

Your own version vs UptimeRobot, at personal or small-team scale.

Build time

Working MVP for yourself: 3–8 h
Polished, relied on daily: 3–5 days
MVP time at $50/h equals: 28 months of UptimeRobot

UptimeRobot price (checked 2026-11-03)

Solo: $10/mo billed annually

Solo plan with 10 monitors and 60-second checks; the official page showed EUR 9 per month billed yearly (EUR 10 monthly). The free plan has 50 monitors at 5-minute intervals.

Source: uptimerobot.com/pricing. Prices change; check before deciding.

Running cost	Per month	Notes
Scheduled worker (Cloudflare Workers cron, Fly.io or a small VPS)	$0–$5	Free tiers cover a few dozen checks per minute; a $5 VPS handles hundreds.
Database for check results	$0–$25	Supabase or Neon free tier is enough if you aggregate old results.
Email alerts	$0	Resend or Postmark free tiers cover alert volume for a personal monitor.
SMS alerts	$0–$5	Optional; you pay per message through Twilio or a similar provider.
Total	$0–$35/mo	Saves up to $120 a year vs UptimeRobot Solo; at the top of the range it costs $300 a year more.

Recommended vibe coding tools

Vibe coding hub →

Claude Code

Good at writing the scheduler, the check worker and tests for timeouts, retries and state transitions.

Cursor

Handy for iterating on the check logic and alert templates inside an existing repo.

Lovable

Quick way to get the dashboard and Supabase tables, then move the checker to a separate worker.

Starter prompt

Paste it into your tool, then ask for a plan before any code. Edit the specifics to match what you need.

prompt.txt

Build a personal uptime monitor for my own sites. Stack: Next.js dashboard, Supabase Postgres and auth, and a separate scheduled worker (Cloudflare Workers cron) that runs every minute.

Data model: monitors (id, user_id, name, url, method, expected_status, keyword, interval_seconds, timeout_ms, paused), checks (monitor_id, checked_at, region, ok, status_code, response_ms, error), incidents (monitor_id, started_at, resolved_at, cause).

Requirements:
- Worker loads due monitors, fetches each with a timeout, retries once after 20 seconds before marking it down.
- Open an incident and send one email and one webhook alert on down, one on recovery. Never alert on every failed check.
- Dashboard: monitor list with status, 24h and 30d uptime, response time chart, incident log.
- Warn 14 days before an SSL certificate expires.
- Heartbeat monitors: each gets a secret ping URL; alert if no ping within interval plus grace.

Security:
- Only http and https URLs. Resolve DNS and block private, loopback, link-local and cloud metadata IPs (169.254.169.254) to prevent SSRF, including after redirects.
- Enable Row Level Security so users only see their own monitors.
- Heartbeat tokens must be random 32-byte values; rate limit the ping endpoint.
- Store webhook URLs encrypted and never log them.

Security pitfalls to check

AI tools often get these wrong by default. Check each one before anyone else uses the app.

01SSRF: a monitor that fetches user-supplied URLs can be pointed at internal services or cloud metadata endpoints; block private IP ranges after DNS resolution and on every redirect.
02Without Row Level Security in Supabase, any logged-in user can read every monitor URL and webhook through the auto-generated API.
03Heartbeat ping URLs act as credentials; use long random tokens, not sequential IDs.
04Alert webhooks to Slack or Discord contain secret URLs; keep them out of logs and client-side code.
05Unbounded check frequency lets one user turn your worker into a request flooder; enforce a minimum interval and per-user monitor limits.

Indie makers who built a real monitoring business

They went far past the prototype: support, payments, reliability and years of iteration. Their profiles show what that took.

PC
Pēteris Caune built Healthchecks.io
Cron job monitoring run by a solo founder, reported at $26K MRR.
$26K MRR
Léo Baecker built Hyperping
Uptime, cron and SSL monitoring with status pages, $11K MRR in 2023.
$11K MRR
Max Rozen built OnlineOrNot
Uptime monitoring for sites, APIs and cron jobs with hosted status pages.
Freek Van der Herten built Oh Dear
Monitoring for uptime, broken links, certificates and scheduled jobs.
Louis Lam built Uptime Kuma
Popular open-source, self-hosted monitor you can run instead of building one.

Or just use these indie-made tools instead

If you need UptimeRobot's job done rather than a project, these are built and supported by independent makers.

All Pingdom alternatives →

Hyperping

hyperping.com

Uptime, synthetic, cron and SSL monitoring with on-call alerts, incident management and branded status pages.

$11K MRRby Léo Baecker

OnlineOrNot

onlineornot.com

Uptime monitoring for websites, APIs and cron jobs, with hosted status pages.

by Max Rozen

Sitesure

sitesure.net

Uptime, API, SSL, DNS and background job heartbeat monitoring with status pages.

by Andrew Timberlake

Healthchecks.io

healthchecks.io

Cron job and scheduled task monitoring that sends alerts when expected pings stop arriving; open source and self-hostable.

$26K MRRby Pēteris Caune

Oh Dear

ohdear.app

Website monitoring for uptime, broken links, certificates and scheduled jobs, co-founded with Mattias Geniar.

by Freek Van der Herten

Uptime Kuma

uptime.kuma.pet

Self-hosted monitoring tool with alerts, status pages and support for HTTP, TCP, DNS, ping and more.

by Louis Lam

What building it teaches you

You learn scheduling, timeouts, retries and state machines, plus the classic SSRF defence every app that fetches URLs needs.

Can you vibe code these too?

All 50 →

Vibe coding hub Can I build it? index Indie alternatives to Pingdom Indie maker tech stacks Indie revenue

Vibe coding UptimeRobot: FAQ

Can you vibe code an uptime monitor like UptimeRobot?

Medium. Yes for a personal monitor of a handful of sites, but the hard part is making sure the monitor itself never goes down silently.

How long does it take to vibe code an uptime monitor like UptimeRobot?

A working personal or internal MVP takes about 3–8 h with a tool like Claude Code. A polished version you would rely on every day takes about 3–5 days, mostly spent on avoiding false alarms: retries and confirmation from a second region before alerting.

How much does it cost to run your own UptimeRobot alternative?

Expect $0–$35/mo at personal or small-team scale (scheduled worker (cloudflare workers cron, fly.io or a small vps), database for check results, email alerts, sms alerts). UptimeRobot Solo costs $10/mo (checked 2026-11-03), so the most you would save is $120 a year, before counting your time.

Can I build my own uptime monitor for free?

Yes. A scheduled worker on a free tier plus a free Postgres database and an email API can check a few dozen URLs every minute at no cost. SMS alerts and multi-region checks are where costs start.

What is the biggest risk of a self-built uptime monitor?

The monitor failing silently. If it runs on the same provider as your app, both can go down together, so host it elsewhere and add an external heartbeat that alerts you when the monitor stops reporting.

Is there an open-source UptimeRobot alternative?

Uptime Kuma is a widely used open-source, self-hosted monitor with status pages and many alert channels. Running it on a small VPS is often faster than building from scratch.

Is it legal to build your own UptimeRobot clone?

Building your own tool that solves the same problem is common and generally fine. Copying UptimeRobot's code, design assets, brand name or content is not. Use your own name and design, respect their terms of service, and get proper advice if you plan to sell it. This page is not legal advice.