# Snapshot Lighthouse Core Web Vitals for One Page

**Use case:** 

Run a lab Lighthouse Core Web Vitals snapshot for one public page. Replace the sample URL and external ID with the page you want scored. The Task returns performance score, LCP, CLS, TBT and FCP without writing monitor state.

## Input

```json
{
  "urls": [
    {
      "url": "https://example.com",
      "externalId": "sample-homepage"
    }
  ],
  "mode": "snapshot",
  "formFactor": "mobile"
}
```

## Output

```json
{
  "external_id": {
    "label": "Your ID",
    "format": "string"
  },
  "status": {
    "label": "Audit status",
    "format": "string"
  },
  "monitor_event": {
    "label": "Monitor event",
    "format": "string"
  },
  "performance_score": {
    "label": "Performance score",
    "format": "number"
  },
  "lcp_ms": {
    "label": "Largest Contentful Paint (ms)",
    "format": "number"
  },
  "cls": {
    "label": "Cumulative Layout Shift",
    "format": "number"
  },
  "tbt_ms": {
    "label": "Total Blocking Time (ms)",
    "format": "number"
  },
  "fcp_ms": {
    "label": "First Contentful Paint (ms)",
    "format": "number"
  },
  "requested_url": {
    "label": "Requested URL",
    "format": "string"
  },
  "scraped_at": {
    "label": "Observed at",
    "format": "string"
  }
}
```

## About this Actor

This example demonstrates how to use [Lighthouse Core Web Vitals Portfolio Monitor](https://apify.com/automa-flow/lighthouse-cwv-monitor.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/automa-flow/lighthouse-cwv-monitor.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/automa-flow/lighthouse-cwv-monitor.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`).