Uptime Checker

This uptime checker continuously verifies the availability of critical endpoints (HTTP/HTTPS, API endpoints, and DNS resolves) at configurable intervals. It records response status, latency, and outage events to produce a reliable uptime metric and incident history. It supports multi-endpoint monitoring, basic authentication, and optional SSL checks. Data is collected from synthetic probes, which simulate user traffic from multiple geographic locations to reveal regional availability gaps. Outputs include status, latency, and incident counts for SLAs and internal reliability goals.
Core logic aggregates checks into uptime measurements over time. Each check yields a status (UP/DOWN), a timestamp, and a latency value. Uptime percentage is computed as the ratio of available check windows to the total observed window, using a rolling window (e.g., last 30 days) or calendar-based period. Alerts trigger when consecutive failures exceed a threshold. Advanced calculations include percentile latency and incident duration to inform performance SLAs.
Audience and differentiators: software teams, site reliability engineers, and agencies responsible for uptime. The tool distinguishes itself with multi-region synthetic checks, configurable check intervals, exportable incident histories, and a simple API for retrieval of uptime data. It supports standard protocols, flexible alerting windows, and data retention policies. This combination enables objective SLA reporting, post-incident analysis, and long-term trend insights without requiring on-site monitoring.
Use cases include page availability dashboards, API health monitoring, and reliability audits for client projects. The tool provides raw metrics and summarized KPIs to inform incident response and capacity planning. It is designed to scale with the number of endpoints and geographic regions while maintaining deterministic calculations and transparent data retention.