# Core Web Vitals Bulk Checker (`victor187/core-web-vitals-bulk-checker`) Actor

Bulk-checks Core Web Vitals (LCP, CLS, INP) and Lighthouse performance scores for many URLs at once, using Google's own official PageSpeed Insights API. Mobile and desktop.

- **URL**: https://apify.com/victor187/core-web-vitals-bulk-checker.md
- **Developed by:** [victor](https://apify.com/victor187) (community)
- **Categories:** SEO tools
- **Stats:** 1 total users, 0 monthly users, 0.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $20.00 / 1,000 results

This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.

Learn more: https://docs.apify.com/actors/running/actors-in-store.md#pay-per-event

## What's an Apify Actor?

An Actor is a serverless cloud program that runs on the Apify platform. It has two run modes.
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.

Apify vocabulary and the platform model are defined once, in the agent quickstart at https://apify.com/agents.md.

## 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.

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 examples already wired to this Actor's own input schema, see the [API](#api) section below.

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`).

# README

## Core Web Vitals Bulk Checker

Check Core Web Vitals (LCP, CLS, INP) and the Lighthouse performance score for dozens of URLs in one run — using Google's own official PageSpeed Insights API, not a scraper.

### Features

- **Core Web Vitals checker** for LCP, CLS and INP — the exact metrics Google uses as a ranking signal
- **Bulk PageSpeed Insights API** wrapper — check 50+ URLs in one run instead of one at a time in the browser tool
- **Mobile and desktop** results side by side, since Google evaluates them separately
- **Lab data AND real-user field data** (Chrome UX Report) together — lab scores show what Lighthouse measures in a controlled run, field data shows what your actual visitors experience
- **Top improvement opportunities** ranked by potential time savings for each URL, not just a raw score
- 100% official Google API — no scraping, no ToS risk, no CAPTCHAs to fight

### Input

```json
{
  "urls": ["https://example.com/", "https://example.com/product-page"],
  "strategies": ["mobile", "desktop"],
  "googleApiKey": "your-own-google-cloud-api-key"
}
```

You need your own free Google Cloud API key with the **PageSpeed Insights API** enabled (console.cloud.google.com). Google's free tier gives 25,000 requests/day — you are never charged by us for API usage, which keeps our per-result price low.

### Output

```json
{
  "url": "https://example.com/",
  "strategy": "mobile",
  "performanceScore": 87,
  "lcpDisplay": "2.1 s",
  "clsDisplay": "0.05",
  "tbtMs": 120,
  "fieldLcpCategory": "FAST",
  "fieldClsCategory": "FAST",
  "fieldInpCategory": "AVERAGE",
  "topOpportunities": ["Eliminate render-blocking resources", "Properly size images"]
}
```

### Who this is for

- SEO agencies auditing a client's entire site for Core Web Vitals before a campaign
- Developers checking performance regressions across many pages after a deploy
- E-commerce teams monitoring their top product/category pages, where a 1-second LCP delay measurably hurts conversion

### Pricing

Pay per use — no subscription:

- $0.01 per run
- $0.02 per URL/device result

### More tools from this developer

- [SEO Technical Health Check & Site Auditor](https://apify.com/victor187/seo-technical-health-check)
- [Duplicate & Near-Duplicate Content Checker](https://apify.com/victor187/duplicate-content-similarity-checker)
- [Product Data Normalizer & Price Cleaner](https://apify.com/victor187/product-data-normalizer)

# Actor input Schema

## `urls` (type: `array`):

List of full URLs (https://...) to audit.

## `strategies` (type: `array`):

Which device types to test each URL on. Testing both doubles the API calls used.

## `googleApiKey` (type: `string`):

Your own free Google Cloud API key with the 'PageSpeed Insights API' enabled (console.cloud.google.com). Google's free quota is 25,000 requests/day -- you are never charged by us for API usage.

## Actor input object example

```json
{
  "urls": [
    "https://example.com/"
  ],
  "strategies": [
    "mobile",
    "desktop"
  ]
}
```

# Actor output Schema

## `auditResults` (type: `string`):

No description

# 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 '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {
    "urls": [
        "https://example.com/"
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("victor187/core-web-vitals-bulk-checker").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 '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = { "urls": ["https://example.com/"] }

# Run the Actor and wait for it to finish
run = client.actor("victor187/core-web-vitals-bulk-checker").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
for item in client.dataset(run.default_dataset_id).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://example.com/"
  ]
}' |
apify call victor187/core-web-vitals-bulk-checker --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,victor187/core-web-vitals-bulk-checker"
        }
    }
}
```

The hosted server signs you in with OAuth on first connect, so no API token belongs in this config. Clients without OAuth support can send an `Authorization: Bearer <APIFY_API_TOKEN>` header instead, using a token from API & Integrations in Apify Console (https://console.apify.com/settings/integrations).

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/actors/F6MDIDAmNhfskWNus/builds/nq2shHUTUBp2okWQr/openapi.json