# Core Web Vitals checker: pass or fail for real users

**Use case:** 

For each page: does it pass Google's Core Web Vitals for real Chrome visitors (LCP, INP and CLS at the 75th percentile, last 28 days)? Failing metrics come with their value, the good limit and the gap to close. If a page has too little traffic, the whole site's data is used and labelled. The example mixes pages that pass and pages that fail on mobile.

## Input

```json
{
  "urls": [
    "https://www.bbc.com/news",
    "https://wordpress.org",
    "https://www.ebay.com",
    "https://www.booking.com"
  ],
  "devices": "mobile",
  "trend": true
}
```

## Output

```json
{
  "url": {
    "label": "URL",
    "format": "string"
  },
  "mobileCoreWebVitals": {
    "label": "Mobile CWV (real users)",
    "format": "string"
  },
  "mobileFailing": {
    "label": "Mobile failing",
    "format": "string"
  },
  "mobilePerformance": {
    "label": "Mobile score",
    "format": "integer"
  },
  "desktopCoreWebVitals": {
    "label": "Desktop CWV (real users)",
    "format": "string"
  },
  "desktopFailing": {
    "label": "Desktop failing",
    "format": "string"
  },
  "desktopPerformance": {
    "label": "Desktop score",
    "format": "integer"
  },
  "summary": {
    "label": "Verdict and first fix",
    "format": "string"
  },
  "reportUrl": {
    "label": "PageSpeed report",
    "format": "string"
  },
  "errorMessage": {
    "label": "Error",
    "format": "string"
  }
}
```

## How it works

### 1. Sign up on Apify or log in

The PageSpeed Insights & Core Web Vitals Checker: Causes & Fixes Actor is ready to run with the inputs already set for "Core Web Vitals checker: pass or fail for real users". [Sign up or log in](https://console.apify.com/create-task-from-example/LVD3QuRAXs4t8zjnC) and you'll land in Apify Console with a copy of this exact task.

### 2. Start the "Core Web Vitals checker: pass or fail for real users" task

The PageSpeed Insights & Core Web Vitals Checker: Causes & Fixes Actor will start running based on the input automatically. You can also change all the input fields, like page urls, devices, and more, to match your specific use case.

### 3. Receive the "Core Web Vitals checker: pass or fail for real users" output

Monitor the progress in real time. You will be notified as soon as your dataset is complete and ready for review. Each result includes data such as URL, mobile cwv (real users), mobile failing, and more.

### 4. Integrate into your workflow

The final output is delivered in JSON, CSV, or Excel format, ready to be plugged into your workflow. You can also [run the "Core Web Vitals checker: pass or fail for real users" task via API](https://apify.com/crawlwise/pagespeed-core-web-vitals.md).

## About this Actor

This example demonstrates how to use [PageSpeed Insights & Core Web Vitals Checker: Causes & Fixes](https://apify.com/crawlwise/pagespeed-core-web-vitals.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/crawlwise/pagespeed-core-web-vitals.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

This Task's input is already configured above. Use it as-is rather than inventing a new one.

Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/crawlwise/pagespeed-core-web-vitals.md

Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).