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/webvitals

From browser-devtools-mcp
57
Install
1
Install the plugin
$
npx claudepluginhub serkan-ozal/browser-devtools-mcp --plugin browser-devtools-mcp

Want just this command?

Then install: npx claudepluginhub u/[userId]/[slug]

Description

Get Core Web Vitals metrics from the current page.

Command Content

/webvitals

Get Core Web Vitals metrics from the current page.

Usage

/webvitals

Description

Retrieves Core Web Vitals performance metrics from the current page including:

  • LCP (Largest Contentful Paint) - Loading performance
  • FID (First Input Delay) - Interactivity
  • CLS (Cumulative Layout Shift) - Visual stability
  • TTFB (Time to First Byte) - Server response time
  • FCP (First Contentful Paint) - Initial render time

Examples

/webvitals

Interpreting Results

MetricGoodNeeds ImprovementPoor
LCP≤2.5s2.5s-4s>4s
FID≤100ms100ms-300ms>300ms
CLS≤0.10.1-0.25>0.25

MCP Tools Used

  • o11y_get-web-vitals - Retrieve Web Vitals metrics
Stats
Stars57
Forks29
Last CommitJan 18, 2026

Other plugins with /webvitals