Provides website performance testing through Google PageSpeed Insights API, analyzing Core Web Vitals and Google ranking signals for both mobile and desktop.

Integrates Lighthouse testing capabilities for comprehensive website analysis including performance metrics, SEO evaluation, and accessibility scoring through multiple testing platforms.

Enables security analysis through Mozilla Observatory API, testing HTTP security headers, CSP policies, HSTS configuration, and overall security posture of websites.

Performs detailed website performance analysis using Google PageSpeed Insights, providing Core Web Vitals measurements, performance scores, and optimization recommendations.

1. Click on "Install Server".

2. Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.

3. In the chat, type @ followed by the MCP server name and your instructions, e.g., "@Webby MCP Server run a comprehensive performance test on our homepage"

That's it! The server will respond to your query, and you can continue using it as needed.

Here is a step-by-step guide with screenshots.

cd ~/mcp-servers/servers/src/webby
npm install
npm run build

{
 url: string,
 strategy?: 'mobile' | 'desktop', // default: mobile
 apiKey?: string // optional, for higher quota
}
// Returns: Performance score, Core Web Vitals, metrics

{
 url: string,
 location?: string, // e.g., 'Dulles:Chrome'
 runs?: number, // default: 1
 waitForResults?: boolean, // default: false (returns test ID immediately)
 timeout?: number // default: 300000 (5 min)
}
// Returns: Test ID + results URL immediately OR full results if waitForResults=true
// Metrics: Load Time, FCP, LCP, Speed Index, TTI, TBT, CLS, Performance Grade

{
 url: string,
 apiKey: string, // required
 location?: string, // e.g., 'vancouver-canada'
 browser?: string // e.g., 'chrome'
}
// Returns: Lighthouse score, PageSpeed score, load time, page size

{
 url: string,
 wcagLevel?: string // wcag2a, wcag2aa, wcag2aaa, wcag21aa, wcag22aa
}
// Returns: Violations by severity (critical, serious, moderate, minor), passes, incomplete

{
 url: string,
 apiKey: string, // required
 reporttype?: 1 | 2 | 3 | 4 // detail level (default: 2)
}
// Returns: Errors, contrast errors, alerts, WAVE report URL, credits remaining

{
 url: string,
 forceRescan?: boolean // default: false
}
// Returns: Grade (A+ to F), score, tests passed/failed, details URL

{
 url: string,
 email: string, // required by API
 maxAge?: number, // cached report age in hours
 startNew?: boolean, // force new assessment
 waitForComplete?: boolean, // wait for completion (can take 2-5 min)
 maxWaitMinutes?: number // default: 5
}
// Returns: Grade (A+ to F), endpoint details, protocol info, status

{
 url: string,
 pagespeedApiKey?: string,
 gtmetrixApiKey?: string,
 webpagetestEnabled?: boolean, // enable browser automation
 webpagetestWaitForResults?: boolean // wait for WPT completion
}
// Returns: Results from PageSpeed + optionally WebPageTest + optionally GTmetrix

{
 url: string,
 waveApiKey?: string, // optional
 wcagLevel?: string // for Axe
}
// Returns: Results from Axe + optionally WAVE

{
 url: string
}
// Returns: SEO analysis from PageSpeed Insights (Lighthouse SEO)

{
 url: string,
 email: string, // for SSL Labs
 waitForSSL?: boolean // wait for SSL Labs completion
}
// Returns: Results from Mozilla Observatory + SSL Labs

{
 url: string,
 email: string, // required for SSL Labs
 categories?: string[], // ['performance', 'accessibility', 'seo', 'security']
 pagespeedApiKey?: string,
 gtmetrixApiKey?: string,
 waveApiKey?: string,
 wcagLevel?: string,
 waitForSSL?: boolean
}
// Returns: Complete analysis across all selected categories with overall health score

{
 "tool": "webpagetest",
 "success": true,
 "url": "https://example.com",
 "test_id": "250107_AiDcA4_ABC",
 "results_url": "https://www.webpagetest.org/result/250107_AiDcA4_ABC/",
 "status": "complete",
 "summary": {
 "loadTime": 2500,
 "firstContentfulPaint": 1200,
 "speedIndex": 2300,
 "largestContentfulPaint": 2100,
 "timeToInteractive": 3500,
 "totalBlockingTime": 250,
 "cumulativeLayoutShift": 0.05
 },
 "performance_grade": "A",
 "security_grade": "A+"
}

webby/
├── src/
│ ├── performance/
│ │ ├── pagespeed.ts ✅ Google API
│ │ ├── webpagetest.ts ✅ Playwright automation
│ │ └── gtmetrix.ts ✅ GTmetrix API
│ ├── accessibility/
│ │ ├── axe.ts ✅ Playwright + axe-core
│ │ └── wave.ts ✅ WAVE API
│ ├── security/
│ │ ├── mozilla-observatory.ts ✅ Mozilla API
│ │ └── ssl-labs.ts ✅ SSL Labs API + polling
│ ├── shared/
│ │ └── browser-utils.ts ✅ Playwright utilities
│ └── orchestrator/
│ └── run-all.ts ✅ All orchestrators
├── dist/ # Compiled JavaScript
├── index.ts # Main MCP server entry
├── package.json
└── README.md

validate_performance_webpagetest("https://example.com")
// Returns test ID immediately, check results later at provided URL

validate_performance_webpagetest("https://example.com", {
 waitForResults: true,
 timeout: 300000 // 5 minutes
})
// Waits for test completion, returns full metrics

validate_all_performance("https://example.com", {
 webpagetestEnabled: true, // Enable browser automation
 webpagetestWaitForResults: false // Get test ID instantly
})
// Returns: PageSpeed + WebPageTest results

validate_comprehensive("https://example.com", {
 email: "your@email.com", // For SSL Labs
 categories: ["performance", "security"],
 webpagetestEnabled: true
})
// Returns: Full analysis with overall health score

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