# Bulk Lighthouse & Core Web Vitals Audit — Page Speed (`runlayer/website-performance-audit`) Actor Measure real performance in a live browser: Core Web Vitals (LCP, CLS, FCP, TTFB), page weight and request breakdown by type, third-party load, DOM size, and prioritized speed opportunities with fixes. Returns a 0–100 score. Charged per page — no startup fee. - **URL**: https://apify.com/runlayer/website-performance-audit.md - **Developed by:** [Runlayer](https://apify.com/runlayer) (community) - **Categories:** Developer tools, SEO tools - **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks - **User rating**: No ratings yet ## Pricing from $20.00 / 1,000 page auditeds This Actor is paid per event and usage. You are charged both the fixed price for specific events and for Apify platform usage. Learn more: https://docs.apify.com/platform/actors/running/actors-in-store#pay-per-event ## What's an Apify Actor? Actors are a software tools running on the Apify platform, for all kinds of web data extraction and automation use cases. In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours, and optionally produces a well-defined JSON output, datasets with results, or files in key-value store. In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server. Actors are written with capital "A". ## How to integrate an Actor? If asked about integration, you help developers integrate Actors into their projects. You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready. The best way to integrate Actors is as follows. In JavaScript/TypeScript projects, use official [JavaScript/TypeScript client](https://docs.apify.com/api/client/js.md): ```bash npm install apify-client ``` In Python projects, use official [Python client library](https://docs.apify.com/api/client/python.md): ```bash pip install apify-client ``` In shell scripts, use [Apify CLI](https://docs.apify.com/cli/docs.md): ````bash # MacOS / Linux curl -fsSL https://apify.com/install-cli.sh | bash # Windows irm https://apify.com/install-cli.ps1 | iex ```bash In AI frameworks, you might use the [Apify MCP server](https://docs.apify.com/platform/integrations/mcp.md). If your project is in a different language, use the [REST API](https://docs.apify.com/api/v2.md). For usage examples, see the [API](#api) section below. For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt). # README ## Website Performance Audit — Core Web Vitals & Page Speed Measure how fast a page **really** is, in a live Chromium browser: **Core Web Vitals** (LCP, CLS, FCP, TTFB), full **page weight and request breakdown** by resource type, third-party load, DOM size — plus a **prioritized list of speed opportunities** and a **0–100 score**. Not a meta-tag checker: it loads your page for real and reports what actually slows it down, with the fix for each issue. **Charged per page audited.** No startup fee. Failures cost $0. ### Quick start ```json { "urls": ["https://your-site.com"], "device": "mobile" } ```` → per page: ```json { "url": "https://your-site.com", "score": 72, "lcpMs": 2380, "cls": 0.04, "fcpMs": 1290, "ttfbMs": 410, "loadMs": 3120, "totalKb": 2648, "requests": 84, "thirdPartyRequests": 37, "domNodes": 1120, "renderBlocking": 5, "weightByType": { "document": { "count": 1, "kb": 42 }, "script": { "count": 29, "kb": 1180 }, "image": { "count": 31, "kb": 980 }, "stylesheet": { "count": 6, "kb": 210 }, "font": { "count": 4, "kb": 190 } }, "opportunities": [ { "severity": "warning", "title": "Render-blocking resources", "detail": "5 synchronous scripts/stylesheets in …" }, { "severity": "warning", "title": "Heavy JavaScript", "detail": "Scripts total 1180 KB. Code-split, tree-shake…" } ] } ``` ### What it measures | Group | Details | |---|---| | **Core Web Vitals** | LCP, CLS, FCP, TTFB — measured live with `PerformanceObserver`, scored against Google's thresholds | | **Page weight** | Total transferred bytes + breakdown by type (script / image / css / font / media / other), from real response sizes | | **Requests** | Total count, third-party count | | **DOM** | Element count (excessive-DOM flag) | | **Opportunities** | Render-blocking resources, oversized images, heavy JS, missing text compression, excessive DOM, too many requests, heavy page weight — each with a concrete fix | | **Score** | 0–100 heuristic weighted on Core Web Vitals + weight + requests | | **Device** | Mobile (Google's ranking basis) or desktop emulation | ### Use cases - **Performance monitoring / CI:** audit after each deploy via API; alert when `score` drops or LCP regresses. Run your whole site on a **Schedule** and sort by score. - **Agency & client reports:** a clean, quantified performance snapshot with a fix list. - **Competitive benchmarking:** compare your speed to competitors, at scale. ```bash curl -X POST "https://api.apify.com/v2/acts/runlayer~website-performance-audit/run-sync-get-dataset-items?token=YOUR_TOKEN" \ -H "Content-Type: application/json" \ -d '{"urls": ["https://example.com"], "device": "mobile"}' ``` ### Pricing A fixed price **per page audited** (full browser render + measurement), plus standard Apify platform usage. Failed audits aren't billed. ### FAQ **How does this differ from Google PageSpeed Insights?** Same Core Web Vitals and opportunity ideas, delivered as a **bulk API** you can run on hundreds of URLs on a schedule, with no rate limits or keys, and consistent lab conditions for tracking trends. **Lab or field data?** Lab — a controlled browser load, comparable to Lighthouse. Best for catching regressions and comparing pages under identical conditions. **Focused on SEO signals instead?** See our companion **SEO Audit** actor — it adds titles, meta, headings, structured data and link checks on top of Core Web Vitals. *** Want an INP measurement, a filmstrip, or a specific Lighthouse audit added? **Open an issue.** A ⭐ review helps others find it. ### More tools by Runlayer Part of a suite of fast, no-nonsense web utilities — all pay-per-result, charged only on success, no startup fee: - [Website Screenshot API](https://apify.com/runlayer/web-screenshot-pro) — full-page PNG / JPEG / WebP / PDF - [Website to Markdown](https://apify.com/runlayer/website-to-markdown) — clean Markdown for LLMs & RAG - [PDF & DOCX to Markdown](https://apify.com/runlayer/document-to-markdown) — documents → Markdown for RAG - [SEO Audit + Core Web Vitals](https://apify.com/runlayer/website-seo-audit) — scored on-page audit with fixes - [Website Performance Audit](https://apify.com/runlayer/website-performance-audit) — bulk Core Web Vitals & page speed - [Tech Stack Detector](https://apify.com/runlayer/tech-stack-detector) — CMS, frameworks, analytics, hosting - [Domain, DNS & WHOIS Lookup](https://apify.com/runlayer/domain-dns-intelligence) — records, registration, SSL - [RSS Feed Reader](https://apify.com/runlayer/rss-feed-reader) — RSS / Atom / JSON → normalized JSON - [Job Postings API](https://apify.com/runlayer/job-postings-scraper) — Greenhouse, Lever, Ashby & more ### Use with AI agents (MCP) This Actor is callable by AI agents through the [Apify MCP server](https://mcp.apify.com/). Agents in Claude, Cursor, Windsurf, LangGraph, CrewAI and others can discover it via `search-actors` and run it as a tool — its inputs and outputs are fully described in the schema for reliable agent use. # Actor input Schema ## `urls` (type: `array`): Pages to audit. Each produces one performance report (one billable event). ## `device` (type: `string`): Emulate a mobile or desktop viewport for the audit (mobile is what Google's ranking uses). ## `waitUntil` (type: `string`): When to consider the page loaded before measuring. ## `timeoutMs` (type: `integer`): Max time to wait for the page before measuring whatever loaded. ## `proxyConfiguration` (type: `object`): Off by default so timings reflect the real page (proxy latency would distort Core Web Vitals). Enable only if a site blocks datacenter IPs. ## Actor input object example ```json { "urls": [ "https://example.com", "https://www.bbc.com" ], "device": "mobile", "waitUntil": "load", "timeoutMs": 60000, "proxyConfiguration": { "useApifyProxy": false } } ``` # API You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup. ## JavaScript example ```javascript import { ApifyClient } from 'apify-client'; // Initialize the ApifyClient with your Apify API token // Replace the '' with your token const client = new ApifyClient({ token: '', }); // Prepare Actor input const input = { "urls": [ "https://www.apify.com" ] }; // Run the Actor and wait for it to finish const run = await client.actor("runlayer/website-performance-audit").call(input); // Fetch and print Actor results from the run's dataset (if any) console.log('Results from dataset'); console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`); const { items } = await client.dataset(run.defaultDatasetId).listItems(); items.forEach((item) => { console.dir(item); }); // 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs ``` ## Python example ```python from apify_client import ApifyClient # Initialize the ApifyClient with your Apify API token # Replace '' with your token. client = ApifyClient("") # Prepare the Actor input run_input = { "urls": ["https://www.apify.com"] } # Run the Actor and wait for it to finish run = client.actor("runlayer/website-performance-audit").call(run_input=run_input) # Fetch and print Actor results from the run's dataset (if there are any) print("💾 Check your data here: https://console.apify.com/storage/datasets/" + run["defaultDatasetId"]) for item in client.dataset(run["defaultDatasetId"]).iterate_items(): print(item) # 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start ``` ## CLI example ```bash echo '{ "urls": [ "https://www.apify.com" ] }' | apify call runlayer/website-performance-audit --silent --output-dataset ``` ## MCP server setup ```json { "mcpServers": { "apify": { "command": "npx", "args": [ "mcp-remote", "https://mcp.apify.com/?tools=runlayer/website-performance-audit", "--header", "Authorization: Bearer " ] } } } ``` ## OpenAPI specification ```json { "openapi": "3.0.1", "info": { "title": "Bulk Lighthouse & Core Web Vitals Audit — Page Speed", "description": "Measure real performance in a live browser: Core Web Vitals (LCP, CLS, FCP, TTFB), page weight and request breakdown by type, third-party load, DOM size, and prioritized speed opportunities with fixes. Returns a 0–100 score. Charged per page — no startup fee.", "version": "0.1", "x-build-id": "MDMqFIYi8DYzhUw7q" }, "servers": [ { "url": "https://api.apify.com/v2" } ], "paths": { "/acts/runlayer~website-performance-audit/run-sync-get-dataset-items": { "post": { "operationId": "run-sync-get-dataset-items-runlayer-website-performance-audit", "x-openai-isConsequential": false, "summary": "Executes an Actor, waits for its completion, and returns Actor's dataset items in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/inputSchema" } } } }, "parameters": [ { "name": "token", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Enter your Apify token here" } ], "responses": { "200": { "description": "OK" } } } }, "/acts/runlayer~website-performance-audit/runs": { "post": { "operationId": "runs-sync-runlayer-website-performance-audit", "x-openai-isConsequential": false, "summary": "Executes an Actor and returns information about the initiated run in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/inputSchema" } } } }, "parameters": [ { "name": "token", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Enter your Apify token here" } ], "responses": { "200": { "description": "OK", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/runsResponseSchema" } } } } } } }, "/acts/runlayer~website-performance-audit/run-sync": { "post": { "operationId": "run-sync-runlayer-website-performance-audit", "x-openai-isConsequential": false, "summary": "Executes an Actor, waits for completion, and returns the OUTPUT from Key-value store in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/inputSchema" } } } }, "parameters": [ { "name": "token", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Enter your Apify token here" } ], "responses": { "200": { "description": "OK" } } } } }, "components": { "schemas": { "inputSchema": { "type": "object", "required": [ "urls" ], "properties": { "urls": { "title": "URLs", "type": "array", "description": "Pages to audit. Each produces one performance report (one billable event).", "items": { "type": "string" } }, "device": { "title": "Device", "enum": [ "mobile", "desktop" ], "type": "string", "description": "Emulate a mobile or desktop viewport for the audit (mobile is what Google's ranking uses).", "default": "mobile" }, "waitUntil": { "title": "Wait until", "enum": [ "load", "networkidle" ], "type": "string", "description": "When to consider the page loaded before measuring.", "default": "load" }, "timeoutMs": { "title": "Navigation timeout (ms)", "minimum": 5000, "maximum": 120000, "type": "integer", "description": "Max time to wait for the page before measuring whatever loaded.", "default": 60000 }, "proxyConfiguration": { "title": "Proxy", "type": "object", "description": "Off by default so timings reflect the real page (proxy latency would distort Core Web Vitals). Enable only if a site blocks datacenter IPs.", "default": { "useApifyProxy": false } } } }, "runsResponseSchema": { "type": "object", "properties": { "data": { "type": "object", "properties": { "id": { "type": "string" }, "actId": { "type": "string" }, "userId": { "type": "string" }, "startedAt": { "type": "string", "format": "date-time", "example": "2025-01-08T00:00:00.000Z" }, "finishedAt": { "type": "string", "format": "date-time", "example": "2025-01-08T00:00:00.000Z" }, "status": { "type": "string", "example": "READY" }, "meta": { "type": "object", "properties": { "origin": { "type": "string", "example": "API" }, "userAgent": { "type": "string" } } }, "stats": { "type": "object", "properties": { "inputBodyLen": { "type": "integer", "example": 2000 }, "rebootCount": { "type": "integer", "example": 0 }, "restartCount": { "type": "integer", "example": 0 }, "resurrectCount": { "type": "integer", "example": 0 }, "computeUnits": { "type": "integer", "example": 0 } } }, "options": { "type": "object", "properties": { "build": { "type": "string", "example": "latest" }, "timeoutSecs": { "type": "integer", "example": 300 }, "memoryMbytes": { "type": "integer", "example": 1024 }, "diskMbytes": { "type": "integer", "example": 2048 } } }, "buildId": { "type": "string" }, "defaultKeyValueStoreId": { "type": "string" }, "defaultDatasetId": { "type": "string" }, "defaultRequestQueueId": { "type": "string" }, "buildNumber": { "type": "string", "example": "1.0.0" }, "containerUrl": { "type": "string" }, "usage": { "type": "object", "properties": { "ACTOR_COMPUTE_UNITS": { "type": "integer", "example": 0 }, "DATASET_READS": { "type": "integer", "example": 0 }, "DATASET_WRITES": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_READS": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_WRITES": { "type": "integer", "example": 1 }, "KEY_VALUE_STORE_LISTS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_READS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_WRITES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_INTERNAL_GBYTES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_EXTERNAL_GBYTES": { "type": "integer", "example": 0 }, "PROXY_RESIDENTIAL_TRANSFER_GBYTES": { "type": "integer", "example": 0 }, "PROXY_SERPS": { "type": "integer", "example": 0 } } }, "usageTotalUsd": { "type": "number", "example": 0.00005 }, "usageUsd": { "type": "object", "properties": { "ACTOR_COMPUTE_UNITS": { "type": "integer", "example": 0 }, "DATASET_READS": { "type": "integer", "example": 0 }, "DATASET_WRITES": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_READS": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_WRITES": { "type": "number", "example": 0.00005 }, "KEY_VALUE_STORE_LISTS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_READS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_WRITES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_INTERNAL_GBYTES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_EXTERNAL_GBYTES": { "type": "integer", "example": 0 }, "PROXY_RESIDENTIAL_TRANSFER_GBYTES": { "type": "integer", "example": 0 }, "PROXY_SERPS": { "type": "integer", "example": 0 } } } } } } } } } } ```