03 — Cirv Pulse

Core Web Vitals, watched from inside WordPress.

Stop pasting URLs into PageSpeed Insights once a month. Cirv Pulse pulls LCP, INP, CLS, FCP and TTFB straight into your WP admin, on a schedule, and tells you the day a deploy made things worse — not a quarter later when rankings drop.

Install free from WordPress.org → Start Pro 7-day trial

What it does, and what it doesn't.

It measures the metrics Google ranks on and shows you the trend. It is not a caching plugin and won't "optimise" your site behind your back.

Five real metrics

LCP, INP, CLS, FCP and TTFB — the field signals that actually move Core Web Vitals, not a single vanity score.

PageSpeed API

Scheduled scans (Pro)

Daily or weekly runs across the URLs you choose, so regressions surface on their own — no manual checking.

Trend history (Pro)

Charts over time, so you can tie a metric swing to the exact release that caused it.

What a scan returns.

The five field metrics, scored against Google's thresholds, with the trend since the last run.

Core Web Vitals — /  (mobile)        scanned 2026-05-31
  LCP   2.1s   good     ▲ +0.3s since 05-24
  INP   140ms  good     ▼ -20ms
  CLS   0.04   good     ─
  FCP   1.4s   good     ─
  TTFB  480ms  needs-improvement  ▲ +90ms  ← investigate

Pricing.

Free core on WordPress.org. Pro adds scheduled scans and historical trend charts across every URL you track.

Free

$0_/forever

On-demand Core Web Vitals scan
LCP, INP, CLS, FCP, TTFB
PageSpeed API integration

Download free

Pro

$9_/mo

or $79/yr — save $29

Everything in Free
Scheduled scans (daily/weekly)
Historical trend charts
Regression alerts

Start 7-day trial

Frequently asked.

Does it conflict with WP Rocket or Perfmatters?

No. Cirv Pulse only measures — it doesn't cache, minify, or change your site. Run it alongside any optimisation plugin to see whether that plugin is actually helping.

Where do the numbers come from?

Google's PageSpeed Insights API — the same source Search Console uses. So the scores you see in Cirv Pulse line up with what Google reports for your site.

Do I need an API key?

A free Google PageSpeed API key raises your scan quota, and the setup screen links you straight to it. The free tier works without one for occasional checks.