PROBEPLANE KNOWLEDGE
What is uptime monitoring?
A practical definition of external availability checks, their core metrics and their place in a modern monitoring stack.
Uptime monitoring is the automated, recurring verification that a website, API or other network-accessible service is available. A monitoring service sends a real request at a fixed interval, evaluates the result and records when the check happened, whether it succeeded, its status code and its response time.
How does uptime monitoring work?
- A scheduler identifies endpoints whose next check is due.
- A worker sends an HTTP or HTTPS request to the configured URL.
- The response is compared with the expected status range and timeout.
- The result and response time are stored for the availability history.
The metrics that matter
| Metric | Meaning |
|---|---|
| Uptime / success rate | Share of successful checks in a defined period. |
| Response time | Elapsed time from starting the request until receiving the response. |
| Check interval | Time between two scheduled checks. Shorter intervals reduce detection delay. |
| HTTP status | The response code used to decide whether the endpoint behaved as expected. |
Uptime monitoring vs. observability
Uptime monitoring is an external symptom check: can a user reach the service? Observability analyzes internal telemetry such as logs, metrics and traces to explain why a system behaves a certain way. Mature teams use both. The external check confirms impact; internal telemetry supports diagnosis.
What does ProbePlane monitor today?
ProbePlane currently focuses on public HTTP and HTTPS endpoints. It supports configurable intervals, expected status ranges, timeouts, response-time measurement, availability history and multi-user workspaces. Email, webhook and SMS alerts, status pages, SSL certificate checks and domain-expiry checks are planned capabilities rather than current production features.
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