Your early warning system

Catch outages and drift before customers do.

Your site can be up and still let people down. See availability, browser performance, and configuration drift together.

From your API to your TLS certificate, give every layer of your stack a canary.

Start monitoring Explore the docs →

SiteCanary / Monitors

AvailabilityHTTP, DNS, TCP

ExperiencePerformance & accessibility

HTTP APIapi.example.com

Healthy

184 ms

TLS certificateexample.com:443

Expiring soon

14 days

DNS resolutionexample.com

Healthy

4 answers

A heads-up before an outage. Certificate expiry is visible alongside service health.

Coverage

Monitor each layer of your stack

Start with recommended coverage, then tune individual monitors.

01 / Application

Go beyond “it’s up.”

HTTP status, latency, content assertions, and response headers.

HTTP monitoring

02 / Browser

See what visitors experience.

Page performance, accessibility, screenshots, and JavaScript errors.

Browser performance Accessibility

03 / Infrastructure

Watch the foundations.

DNS, TCP, TLS, and SSH reachability and configuration.

Network monitoring TLS and SSH

Explainable alerts

Know what changed

Thresholds and drift rules create clear alerts that reach the right recipients.

1
Detect
A monitor crosses a threshold or finds configuration drift.
2
Explain
Run details show the failed assertion and observed values.
3
Route
The alert is recorded and sent to configured recipients.

Questions

SiteCanary FAQ

What does SiteCanary monitor?

SiteCanary monitors HTTP endpoints, browser performance, accessibility, JavaScript errors, DNS, TCP, TLS, and SSH.

How is SiteCanary different from a basic uptime monitor?

It combines availability checks with response assertions, browser measurements, accessibility scans, infrastructure diagnostics, configuration drift, and bounded long-term history.

How long does SiteCanary retain monitoring data?

Detailed recent runs are retained in Postgres up to each monitor's configured limit, while fixed-size ringstore files keep bounded aggregate history across longer time ranges.

Can SiteCanary monitor authenticated applications?

HTTP monitors support manually configured request headers. Auth flows currently support saved configuration and manual tests only; they cannot be attached to monitors and do not automatically log in, refresh tokens, or share credentials with scheduled monitors.

How is SiteCanary deployed?

Deployment is environment-driven and includes a documented Linux VPS workflow. Availability and commercial packaging depend on the operator providing the service.

Start simply

Start with one URL.

Create recommended coverage, then adjust each monitor as your needs grow.