Website Monitoring for Agencies
Your clients expect you
to know first.
Sentinel monitors every client site from fifteen regions around the world, helping your team catch downtime, broken pages, SSL, DNS, and other issues before they become client problems.
Beyond uptime
Monitor what your clients depend on.
A client site is more than a homepage. Sentinel watches the availability, content, SSL, DNS, APIs, and background jobs that all have to work for the site to do its job.
Start monitoring freeWebsite uptime
Check every client site from fifteen regions around the world, and only hear about it when the regions agree the site is down.
Critical content
Confirm the headline, form or price a client depends on is actually on the page, and catch error text that shouldn’t be there.
SSL certificates
Get warned weeks before a certificate expires or breaks, so a client’s visitors never meet a browser security warning.
DNS & domains
Catch DNS record changes and expiring domain registrations before they take a healthy site offline.
APIs & endpoints
Watch the forms, booking widgets and integrations a site relies on, with status codes, response times and JSON assertions.
Cron & heartbeat jobs
Know when backups, imports and scheduled tasks stop running. Each job checks in, and a missed check-in alerts you.
Built for agencies
Make monitoring part of the service you deliver.
Your clients may never see the systems behind their websites, but they notice when something stops working. Sentinel helps your team stay proactive, respond faster, and show clients the ongoing value of keeping their sites monitored.
fifteen-region monitoring
See problems your hosting dashboard can miss.
Check every client site from outside your infrastructure, across fifteen regions around the world.
branded reports
Show the work clients rarely see.
Turn uptime and incident history into professional reports carrying your agency’s brand.
status pages
Communicate clearly when something goes wrong.
Give clients and their customers a reliable place to see service status during an incident.
team access
Keep everyone working from the same picture.
Organize client sites, collaborate with your team, and make sure the right people can see what needs attention.
FAQ
Fair questions.
Straight answers about monitoring client sites with Sentinel.
Why do agencies need outside-in monitoring if their hosting provider already monitors uptime?
Hosting and infrastructure monitoring can look healthy while a client site is unreachable because of DNS, SSL, CDN, routing, application, or content issues. Sentinel checks from fifteen regions outside the hosting environment.
How many client sites can we monitor?
The free plan includes up to 10 monitors with 5-minute checks. Paid plans add more monitors, faster intervals, and additional features as your client portfolio grows.
How does Sentinel help reduce false alarms?
Sentinel checks from multiple regions and confirms outages across regions before opening an incident, helping filter out isolated network failures.
Can Sentinel monitor more than just uptime?
Yes. Every plan covers SSL certificates, domains, DNS, page content, APIs, JSON responses, and ports. Heartbeat and cron monitoring start on Starter.
Can we give clients reports or status pages?
Yes. Every plan includes at least one public status page. Pro includes up to 10 branded status pages with custom domains, and Business adds unlimited status pages plus client-ready uptime reports.
Can multiple people at our agency use Sentinel?
Yes, on Pro and Business. Pro includes one team with up to five members. Business includes unlimited teams and members. Free and Starter are single-user.
Do we need to install anything on client sites?
No. Sentinel monitors externally, so there is no plugin, package, or agent required for standard website monitoring.
How quickly can we set up monitoring for a new client site?
Usually in about 30 seconds. Add the URL, choose what you want to monitor, and Sentinel starts checking it.
Stay ahead
Be the agency that already knows.
Monitor every client site from fifteen regions around the world, so your team can catch problems early, respond quickly, and keep clients confident.