Uptime monitoring · 24/7 global checks
Uptime monitoringthat never sleeps
Monitor your websites around the clock from 15 regions across six continents, with checks as fast as every 15 seconds. Get reliable alerts by email, SMS, Slack, or webhook when your attention is needed.
Response time
Performance over time
Average
186ms
Min
98ms
Max
312ms
Why uptime monitoring
15 regions. One clear answer.
Sentinel checks your site from 15 regions across six continents, so you're not relying on a single server to tell you whether you're online. Every check runs from every region, with multi-region confirmation built in.
- Every check runs from all 15 regions
- Outages are confirmed across regions and continents
- Response times and incident history included
15s
Fastest check interval
15
Global regions
6
Continents
24/7
Global monitoring
Capabilities
Everything you need to know you're online.
Checks as fast as 15 seconds
Stay close to what's happening with fast, consistent checks for your most important websites and services.
Multi-region confirmation
Every check runs from 15 regions across six continents, with outages confirmed across multiple regions before Sentinel alerts you.
Response time tracking
Track response times over time and see how performance changes across Sentinel's global network.
Content & error detection
A page can return 200 and still be broken. Sentinel checks the response for errors, missing content, and unexpected changes.
Configurable confirmation
Choose how long a failure must persist before an incident opens and how long recovery must hold before it closes, per monitor.
Smart notifications
Send alerts to email, SMS, Slack, Discord, Telegram, Microsoft Teams, or webhooks, with notification preferences for each monitor.
Advanced HTTP options
Configure custom methods, headers, request bodies, authentication, accepted status codes, timeouts, and more.
API, CLI, Terraform & MCP
Create and manage monitors from the REST API, CLI, Terraform, or AI assistants over MCP. Monitoring doesn't have to start in the dashboard.
Domain & SSL included
Every uptime monitor also tracks SSL certificate and domain expiration automatically.
Global coverage
Every check. Every region.
Every uptime check runs from all 15 regions across six continents. Sentinel compares the results across its global network, giving you a clearer picture of what's happening from around the world.
🇺🇸Ashburn, Virginia
US-EAST
200142ms
🇺🇸Chicago, Illinois
US-CENTRAL
200124ms
🇺🇸Seattle, Washington
US-WEST
200189ms
🇨🇦Toronto, Canada
CA-CENTRAL
200131ms
🇲🇽Mexico City, Mexico
MX-CENTRAL
200158ms
🇧🇷São Paulo, Brazil
SA-EAST
200296ms
🇬🇧London, United Kingdom
EU-WEST
200161ms
🇩🇪Frankfurt, Germany
EU-CENTRAL
200243ms
🇮🇱Tel Aviv, Israel
IL-CENTRAL
200287ms
🇿🇦Johannesburg, South Africa
AF-SOUTH
200331ms
🇮🇳Mumbai, India
AP-SOUTH
200302ms
🇸🇬Singapore
AP-SOUTHEAST
200312ms
🇯🇵Tokyo, Japan
AP-NORTHEAST
200276ms
🇰🇷Seoul, South Korea
KR-CENTRAL
200284ms
🇦🇺Sydney, Australia
AU-EAST
200318ms
How often does Sentinel check my websites?
Uptime checks can run as often as every 15 seconds, depending on your plan. Every scheduled check runs from all 15 Sentinel regions.
Does Sentinel check from multiple locations?
Yes. Every uptime check runs from 15 regions across six continents. Sentinel doesn't rotate your checks between locations, so each check gives you a global view of availability and response time.
How does Sentinel prevent false alerts?
Sentinel confirms failures across multiple regions and continents before opening an incident. You can also set confirmation and recovery periods per monitor, so brief interruptions don't have to trigger an alert.
Will firewalls or bot protection block Sentinel?
SentinelBot is verified in Cloudflare Radar, every check uses a documented user agent, and Sentinel's monitoring IP addresses are published for allowlisting.
How can Sentinel notify me?
Alerts can be sent by email, SMS, Slack, Discord, Telegram, Microsoft Teams, PagerDuty, or webhook, depending on your plan and configuration.
Can I manage uptime monitoring with an API or Terraform?
Yes. Sentinel monitors can be managed through the dashboard, REST API, CLI, Terraform provider, or AI assistants over MCP.
What can Sentinel monitor besides uptime?
Sentinel also monitors SSL certificates, DNS records, domain expiration, page content, JSON/API responses, server errors, ICMP ping, TCP ports, heartbeats, and cron jobs.
Is there a free plan?
Yes. The free plan includes up to 10 monitors with no credit card required. Paid plans include a 14-day trial.
Get global monitoring in 30 seconds.
15 regions. Six continents. Every check.
No credit card. Nothing to install. 10 monitors free forever.