# Mobile Core Web Vitals check with pass/fail budget

**Use case:** 

Performance-only Lighthouse run on mobile (slow 4G, like PageSpeed Insights). Returns LCP, CLS, TBT and the performance score per URL, plus passedPerformanceBudget true/false against a score of 50. Useful for scheduled regression checks.

## Input

```json
{
  "startUrls": [
    {
      "url": "https://apify.com"
    },
    {
      "url": "https://docs.apify.com"
    }
  ],
  "sitemapUrl": "",
  "maxSitemapUrls": 50,
  "strategies": [
    "mobile"
  ],
  "categories": [
    "performance"
  ],
  "minPerformanceScore": 50,
  "maxOpportunities": 3,
  "saveHtmlReports": false,
  "pageTimeoutSecs": 60
}
```

## Output

```json
{
  "url": {
    "label": "URL",
    "format": "string"
  },
  "strategy": {
    "label": "Device",
    "format": "string"
  },
  "status": {
    "label": "Status",
    "format": "string"
  },
  "scores.performance": {
    "label": "Performance",
    "format": "integer"
  },
  "scores.accessibility": {
    "label": "Accessibility",
    "format": "integer"
  },
  "scores.bestPractices": {
    "label": "Best practices",
    "format": "integer"
  },
  "scores.seo": {
    "label": "SEO",
    "format": "integer"
  },
  "largestContentfulPaintMs": {
    "label": "LCP (ms)",
    "format": "number"
  },
  "totalBlockingTimeMs": {
    "label": "TBT (ms)",
    "format": "number"
  },
  "cumulativeLayoutShift": {
    "label": "CLS",
    "format": "number"
  },
  "passedPerformanceBudget": {
    "label": "Budget passed",
    "format": "boolean"
  },
  "errorMessage": {
    "label": "Error",
    "format": "string"
  }
}
```

## How it works

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

The Lighthouse Bulk Auditor: Core Web Vitals and SEO for many URLs Actor is ready to run with the inputs already set for "Mobile Core Web Vitals check with pass/fail budget". [Sign up or log in](https://console.apify.com/create-task-from-example/FUlXEksQIOiXyaoUu) and you'll land in Apify Console with a copy of this exact task.

### 2. Start the "Mobile Core Web Vitals check with pass/fail budget" task

The Lighthouse Bulk Auditor: Core Web Vitals and SEO for many URLs Actor will start running based on the input automatically. You can also change all the input fields, like URLs to audit, max pages from sitemap, and more, to match your specific use case.

### 3. Receive the "Mobile Core Web Vitals check with pass/fail budget" 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, device, status, 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 "Mobile Core Web Vitals check with pass/fail budget" task via API](https://apify.com/reflexdev/lighthouse-bulk-auditor.md).

## About this Actor

This example demonstrates how to use [Lighthouse Bulk Auditor: Core Web Vitals and SEO for many URLs](https://apify.com/reflexdev/lighthouse-bulk-auditor.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/reflexdev/lighthouse-bulk-auditor.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/reflexdev/lighthouse-bulk-auditor.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`).