Core Web Vitals Monitoring
LCP, CLS, FCP, TTFB and TBT from a real browser, tracked over time.
Each check loads your page in a real browser and reads the metrics Google's ranking weighs straight from the page's Performance APIs.
What it detects
- LCP or CLS crossing your threshold (Google's “poor” boundary by default)
- Regressions in FCP, TTFB and TBT, charted alongside
- Pages that don't load, or that serve a bot-protection challenge instead
How you're alerted
- The monitor goes down with the exact reason, e.g. “LCP 4210ms exceeds 2500ms”.
Notifications go to any of 8 channels — see notifications.
- Runs from
- MonSPHERE's own workers — no region to pick
- Engine
- Sandboxed headless Chromium — can't reach private or internal addresses
- Interval
- At most every 5 minutes
- Available on
- Professional · Enterprise and Custom on request
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Accessibility (WCAG) Monitoring
Scheduled axe-core audits of your page against WCAG 2.x A/AA in a real browser — violated rules by impact and affected elements, with an alert when critical issues appear.
Screenshot Monitoring
Scheduled visual snapshots of a page, diffed pixel-by-pixel against the previous one to catch a change nothing else picks up on.
Start monitoring everything in minutes
Create a free account, add your first check and get alerted the moment something breaks — no credit card required.