GTmetrix Performance Tester

Pricing

from $0.01 / 1,000 results

GTmetrix Performance Tester

Automated website performance testing using GTmetrix. Get Core Web Vitals, PageSpeed scores, waterfall analysis & optimization recommendations. Batch test multiple URLs.

Pricing

from $0.01 / 1,000 results

Rating

0.0

(0)

Developer

John Rippy

Maintained by Community

Actor stats

Bookmarked

Total users

Monthly active users

a day ago

Last modified

Features

Performance Scores: GTmetrix Grade, Performance Score, Structure Score
Core Web Vitals: LCP, TBT, CLS - the metrics Google uses for ranking
Loading Metrics: First Contentful Paint, Time to Interactive, Fully Loaded Time
Multiple Locations: Test from 7 global server locations
BYOK Support: Bring your own free GTmetrix API key

Quick Start

{
  "input": "your input here"
}

Demo Mode

Set demoMode: true to test with sample data (no charges). When you're ready for real results, set demoMode: false or omit it.

{
  "demoMode": true,
  ...
}

Input Parameters

Parameter	Type	Required	Description
See input schema

Output Format

{
  "url": "https://example.com",
  "gtmetrixGrade": "A",
  "performanceScore": 92,
  "structureScore": 88,
  "largestContentfulPaint": 1245,
  "totalBlockingTime": 150,
  "cumulativeLayoutShift": 0.05,
  "firstContentfulPaint": 890,
  "timeToInteractive": 2100,
  "fullyLoadedTime": 3500,
  "pageSize": 1524000,
  "requests": 45,
  "reportUrl": "https://gtmetrix.com/reports/...",
  "recommendations": [
    {
      "name": "Serve images in next-gen formats",
      "score": 45,
      "savings": "234 KB"
    }
  ],
  "testedAt": "2025-12-23T12:00:00Z"
}

Pricing

This actor uses pay-per-event billing:

$0.01 per URL tested
Demo mode is free
BYOK uses your own GTmetrix credits

Use Cases

SEO Performance Audit

Test your site and competitors to benchmark performance.

Core Web Vitals Monitoring

Track LCP, TBT, CLS over time to ensure Google ranking signals stay healthy.

Before/After Optimization

Test before making changes, optimize, then test again to measure improvement.

Multi-Location Testing

Test from different regions to ensure global performance.

Common Problems & Solutions

"Invalid API key" error

Cause: Your API key is wrong, expired, or doesn't have the right permissions. Fix: Double-check your API key. Make sure you copied it exactly without extra spaces.

"Rate limit exceeded" error

Cause: You've hit the API's rate limits. Fix: Wait a few minutes, then try again. Consider reducing the number of concurrent requests.

Empty or incomplete results

Cause: The target may have anti-scraping protection or the data doesn't exist. Fix:

Check if the URL/search query is correct
Try with different parameters
Some sites may block automated access

Demo data showing instead of real results

Cause: demoMode is still set to true. Fix: Set demoMode: false and provide your API key(s).

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