HTTP(S) checks every 5 minutes
Watch any public URL. We record status, latency, and the last check time so you can see gaps instead of a mystery green dot.
Free website uptime monitoring
Know the moment your site goes down — before your users do.
Sentinel Watch is a free hosted uptime monitor. It requests your public HTTP(S) URLs every five minutes, emails you on first failure, confirmed downtime, and recovery, warns when an SSL certificate is close to expiry, and can publish a customer-facing status page with 90-day history bars. There is no credit card, no invented user count, and no “Pro” paywall on this product — just a 50-monitor default, email OTP login, and an honest list of what we do not ship yet.
- Free forever
- No credit card
- Email OTP
- 5-minute checks
- Public status pages
LIVE
docs.example.com
https://docs.example.com
24h: 99.31%~180ms · 5m interval
5m
Check interval
50
Monitors default
$0
No paid plan
Built as a simpler alternative to billed uptime tools — not a fake testimonial wall.
No G2 scores invented
No “3 million users” claims
Limits written on /pricing
Clear messages, not silence
What you get
Keyword + SSL expiry
Fail the check if expected copy is missing from the HTML, and get an email when a certificate is close to expiry.
Public status pages
Share an operational banner, 90-day uptime bars, and incident history with customers — no extra status-page vendor.
Email on down and recovery
First failure, confirmed downtime, and recovery emails go to the address you signed in with. Pause monitors during deploys.
Pause, resume, delete
Maintenance windows should not look like outages. Pause checks, resume when you are ready, or delete a monitor and its history.
No silent failures
If history cannot load, you get an explicit message — not an empty green screen. Pause and delete are first-class, not buried.
How it works
- 1
Sign in with email OTP
No password, no credit card. We email a one-time code and drop you on the dashboard.
- 2
Add the URLs that matter
Name the monitor, paste https://…, optionally require a keyword and SSL warning window, and choose whether it is public.
- 3
Get emailed when it breaks
Checks run every 5 minutes. Failures, recoveries, and SSL warnings hit your inbox. Share /status/[slug] if you want customers in the loop.
Compared with typical paid uptime tools
UptimeRobot, Better Stack, Pingdom, Checkly, and Oh Dear sell speed, locations, and integrations. We compete on being free, hosted, and readable — see the comparison pages.
| Feature | Sentinel Watch | Typical paid uptime SaaS |
|---|---|---|
| Price | Free (hosted) | Often $7–$39+/mo after the free tier |
| Check interval | 5 minutes | 30s–60s on paid plans |
| Monitor types | HTTP(S), keyword, SSL | HTTP plus ping, port, cron, browser, etc. |
| Alerts | Email, SMS, Slack, PagerDuty, voice | |
| Status page | Included public page | Often a paid add-on or custom-domain upsell |
| Team seats | One login email | Per-seat or notify-seat pricing |
| Setup | OTP + add URL | Billing, seats, integrations |
Price
Sentinel Watch · Free (hosted)
Typical paid uptime SaaS · Often $7–$39+/mo after the free tier
Check interval
Sentinel Watch · 5 minutes
Typical paid uptime SaaS · 30s–60s on paid plans
Monitor types
Sentinel Watch · HTTP(S), keyword, SSL
Typical paid uptime SaaS · HTTP plus ping, port, cron, browser, etc.
Alerts
Sentinel Watch · Email
Typical paid uptime SaaS · Email, SMS, Slack, PagerDuty, voice
Status page
Sentinel Watch · Included public page
Typical paid uptime SaaS · Often a paid add-on or custom-domain upsell
Team seats
Sentinel Watch · One login email
Typical paid uptime SaaS · Per-seat or notify-seat pricing
Setup
Sentinel Watch · OTP + add URL
Typical paid uptime SaaS · Billing, seats, integrations
Status pages that look like status pages
Mark a monitor public and share a URL. Visitors get a full-width operational banner, 90-day bars, and an incident timeline — the Statuspage / Better Stack pattern, without a second vendor.
How status pages work90-day uptime bar preview
Questions people actually ask
What is Sentinel Watch?
Sentinel Watch is a free website uptime monitoring tool. It checks HTTP(S) URLs on a 5-minute schedule, emails you when a check fails or recovers, warns before SSL certificates expire, and can publish a public status page with 90-day uptime bars. There is no credit card and no paid plan on this product today.
Is Sentinel Watch really free forever?
Yes. The hosted product is free to use within honest limits: 50 monitors per account by default, 5-minute check intervals, email alerts, and 30 days of check history. We do not show a pricing upsell, trial countdown, or “Pro” paywall. Limits can be raised by an admin for legitimate use. If something is unavailable, you will see a clear message — not a fake-healthy dashboard.
How often do you check my website?
Every 5 minutes. That is the same interval UptimeRobot advertises on its free plan. We do not currently offer 30-second or 60-second intervals. If you need sub-minute detection, a paid multi-location tool or a self-hosted checker is a better fit.
What kinds of monitors are supported?
HTTP and HTTPS URLs. Optional keyword matching (alert if expected text is missing), expected status codes, and SSL expiry warnings. We do not yet offer ping, TCP port, cron heartbeats, Playwright journeys, SMS, Slack, or voice alerts. Pause a monitor during maintenance so those checks do not fire.
How do public status pages work?
When you mark a monitor as public, it appears on a shareable /status/[slug] URL. Visitors see an overall operational banner, per-service 90-day bars, and a recent incident timeline. No account is required to view it. Custom domains and email subscribers are not included yet.
How do I sign in?
Email OTP only. We send a one-time code to your inbox. There are no passwords to store or reset. Use the same email every time so your monitors stay attached to that account.
Start monitoring in under a minute
Sign in with email OTP. Add a URL. We check it every five minutes and email you if it fails.
Create free account