# SEO Audit API — On-Page + Core Web Vitals, Bulk & Scored (`runlayer/website-seo-audit`) Actor

SEO audit with 0–100 score, real Core Web Vitals (LCP, CLS, FCP) measured in a live browser, and prioritized issues each with a concrete fix. Meta, headings, canonical, OG, JSON-LD, alt text, robots.txt, sitemap, broken links. Single pages or site crawls. Charged only per audited page.

- **URL**: https://apify.com/runlayer/website-seo-audit.md
- **Developed by:** [Runlayer](https://apify.com/runlayer) (community)
- **Categories:** SEO tools
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $35.00 / 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

## SEO Audit Tool — On-Page + Core Web Vitals, Scored, With Fixes

Audit any URL and get a **0–100 SEO score**, **real Core Web Vitals measured in
a live browser** (LCP, CLS, FCP, TTFB), and a **prioritized issue list where
every problem comes with a concrete fix**. Audit one page, a list of pages, or
crawl a whole site.

Most audit tools stop at meta tags. This one also *loads your page in real
Chromium and measures how it actually performs* — the signal Google actually
ranks on.

**Charged only per page successfully audited.** No startup fee. Failures cost $0.

### Quick start

```json
{
  "urls": ["https://your-site.com"],
  "checkBrokenLinks": true
}
````

→ per page, a complete audit object:

```json
{
  "url": "https://stripe.com/",
  "score": 78,
  "performance": { "lcpMs": 504, "cls": 0, "fcpMs": 428, "ttfbMs": 97, "loadMs": 1649 },
  "title": "Stripe | Financial Infrastructure to Grow Your Revenue",
  "titleLength": 54,
  "metaDescriptionLength": 149,
  "h1": ["…", "…"],
  "images": { "total": 44, "missingAlt": 40 },
  "links": { "internal": 150, "external": 29, "broken": [] },
  "openGraph": { "title": "…", "description": "…", "image": "…" },
  "structuredData": [],
  "robotsTxt": true, "sitemap": false, "https": true,
  "wordCount": 1671,
  "issues": [
    { "severity": "warning", "message": "Page has 2 <h1> headings (use exactly one).", "fix": "Use a single, descriptive H1." },
    { "severity": "warning", "message": "40 of 44 images are missing alt text.", "fix": "Add descriptive alt text to every meaningful image." },
    { "severity": "warning", "message": "No structured data (JSON-LD schema.org) found.", "fix": "Add relevant schema.org JSON-LD for rich results." },
    { "severity": "warning", "message": "No sitemap.xml found.", "fix": "Publish an XML sitemap and reference it in robots.txt." }
  ]
}
```

### Everything it checks

| Area | Signals |
|---|---|
| **Performance (Core Web Vitals)** | LCP, CLS, FCP, TTFB, full load time — measured live in Chromium, scored against Google's thresholds; plus page weight & request count |
| **Indexability** | canonical, meta robots / noindex, robots.txt, sitemap.xml, HTTPS |
| **On-page** | title & meta-description presence + length, exactly-one-H1, full H1–H6 structure, lang, charset, thin-content flag |
| **Mobile** | viewport meta |
| **Media** | image alt-text coverage |
| **Social** | Open Graph + Twitter card completeness |
| **Structured data** | schema.org JSON-LD types found |
| **Links** | internal/external counts, optional broken-link check (4xx/5xx), capped & parallel |

Every failed check produces an `issues[]` entry with `severity`, `message`, and
a concrete `fix` — hand the list to a developer (or an AI agent) and work
straight down it.

### Site-wide audit

```json
{
  "urls": ["https://your-site.com"],
  "crawl": true,
  "maxPages": 100,
  "maxDepth": 2
}
```

Sort the dataset by `score` ascending — your worst pages first, each with its
fix list.

### Use cases

- **Agencies:** attach the JSON (or a CSV export) to client reports; re-run on a
  Schedule for monthly deltas.
- **CI for SEO:** run after each deploy via API; alert if `score` drops or
  `issues[]` gains an `error`.
- **Prioritization:** crawl the site, sort by score, fix bottom-up.

```bash
curl -X POST "https://api.apify.com/v2/acts/runlayer~website-seo-audit/run-sync-get-dataset-items?token=YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"urls": ["https://your-site.com"], "checkBrokenLinks": true}'
```

### Pricing

A fixed price **per page successfully audited** (full browser render + Core Web
Vitals measurement + all checks included), plus standard Apify platform usage.
No startup fee. Failed pages are never billed.

### FAQ

**How accurate are the Core Web Vitals?** They're measured with the standard
`PerformanceObserver` APIs in a real Chromium load of your page — lab values,
comparable to Lighthouse, ideal for tracking changes over time.

**Is this responsible to run on any site?** The audit reads public, technical
metadata only — no content republishing, no personal data. Broken-link checking
sends lightweight HEAD requests, capped per page. You're responsible for the
URLs you submit.

***

Want a check added (hreflang validation, redirect chains, …)? **Open an issue**
— this actor iterates fast. 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`):

One or more URLs to audit. Each page produces one audit (one billable event). You may omit the https:// prefix.

## `checkBrokenLinks` (type: `boolean`):

Send a request to each link on the page to find broken (4xx/5xx) links. More thorough but slower.

## `maxLinksToCheck` (type: `integer`):

Upper bound on how many links are tested when 'Check for broken links' is on, to control time and cost.

## `crawl` (type: `boolean`):

Follow links from your seed URLs and audit more pages, up to the limits below.

## `maxPages` (type: `integer`):

Hard cap on total pages audited across all seeds.

## `maxDepth` (type: `integer`):

How many link-hops from your seed URLs to follow. 0 = only the URLs you gave.

## `sameDomainOnly` (type: `boolean`):

Only follow links that stay on the seed page's domain.

## `waitUntil` (type: `string`):

When to consider a page loaded (only applies when Render JavaScript is on).

## `timeoutMs` (type: `integer`):

Max time to wait for a page before giving up.

## `proxyConfiguration` (type: `object`):

Off by default (fast, works on most sites). Enable Apify Proxy for bot-protected sites that block datacenter IPs.

## Actor input object example

```json
{
  "urls": [
    "https://example.com"
  ],
  "checkBrokenLinks": false,
  "maxLinksToCheck": 50,
  "crawl": false,
  "maxPages": 10,
  "maxDepth": 1,
  "sameDomainOnly": true,
  "waitUntil": "load",
  "timeoutMs": 45000,
  "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 '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

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

// Run the Actor and wait for it to finish
const run = await client.actor("runlayer/website-seo-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 '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

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

# Run the Actor and wait for it to finish
run = client.actor("runlayer/website-seo-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://apify.com"
  ]
}' |
apify call runlayer/website-seo-audit --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "command": "npx",
            "args": [
                "mcp-remote",
                "https://mcp.apify.com/?tools=runlayer/website-seo-audit",
                "--header",
                "Authorization: Bearer <YOUR_API_TOKEN>"
            ]
        }
    }
}

```

## OpenAPI specification

```json
{
    "openapi": "3.0.1",
    "info": {
        "title": "SEO Audit API — On-Page + Core Web Vitals, Bulk & Scored",
        "description": "SEO audit with 0–100 score, real Core Web Vitals (LCP, CLS, FCP) measured in a live browser, and prioritized issues each with a concrete fix. Meta, headings, canonical, OG, JSON-LD, alt text, robots.txt, sitemap, broken links. Single pages or site crawls. Charged only per audited page.",
        "version": "0.1",
        "x-build-id": "I3nvErg687kQeHNgU"
    },
    "servers": [
        {
            "url": "https://api.apify.com/v2"
        }
    ],
    "paths": {
        "/acts/runlayer~website-seo-audit/run-sync-get-dataset-items": {
            "post": {
                "operationId": "run-sync-get-dataset-items-runlayer-website-seo-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": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK"
                    }
                }
            }
        },
        "/acts/runlayer~website-seo-audit/runs": {
            "post": {
                "operationId": "runs-sync-runlayer-website-seo-audit",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor and returns information about the initiated run in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$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": {
                                    "$ref": "#/components/schemas/runsResponseSchema"
                                }
                            }
                        }
                    }
                }
            }
        },
        "/acts/runlayer~website-seo-audit/run-sync": {
            "post": {
                "operationId": "run-sync-runlayer-website-seo-audit",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor, waits for completion, and returns the OUTPUT from Key-value store in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$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 to audit",
                        "type": "array",
                        "description": "One or more URLs to audit. Each page produces one audit (one billable event). You may omit the https:// prefix.",
                        "items": {
                            "type": "string"
                        }
                    },
                    "checkBrokenLinks": {
                        "title": "Check for broken links",
                        "type": "boolean",
                        "description": "Send a request to each link on the page to find broken (4xx/5xx) links. More thorough but slower.",
                        "default": false
                    },
                    "maxLinksToCheck": {
                        "title": "Max links to check per page",
                        "minimum": 1,
                        "maximum": 300,
                        "type": "integer",
                        "description": "Upper bound on how many links are tested when 'Check for broken links' is on, to control time and cost.",
                        "default": 50
                    },
                    "crawl": {
                        "title": "Crawl the site",
                        "type": "boolean",
                        "description": "Follow links from your seed URLs and audit more pages, up to the limits below.",
                        "default": false
                    },
                    "maxPages": {
                        "title": "Max pages",
                        "minimum": 1,
                        "maximum": 2000,
                        "type": "integer",
                        "description": "Hard cap on total pages audited across all seeds.",
                        "default": 10
                    },
                    "maxDepth": {
                        "title": "Max crawl depth",
                        "minimum": 0,
                        "maximum": 8,
                        "type": "integer",
                        "description": "How many link-hops from your seed URLs to follow. 0 = only the URLs you gave.",
                        "default": 1
                    },
                    "sameDomainOnly": {
                        "title": "Stay on the same domain",
                        "type": "boolean",
                        "description": "Only follow links that stay on the seed page's domain.",
                        "default": true
                    },
                    "waitUntil": {
                        "title": "Wait until",
                        "enum": [
                            "load",
                            "domcontentloaded",
                            "networkidle"
                        ],
                        "type": "string",
                        "description": "When to consider a page loaded (only applies when Render JavaScript is on).",
                        "default": "load"
                    },
                    "timeoutMs": {
                        "title": "Timeout per page (ms)",
                        "minimum": 5000,
                        "maximum": 120000,
                        "type": "integer",
                        "description": "Max time to wait for a page before giving up.",
                        "default": 45000
                    },
                    "proxyConfiguration": {
                        "title": "Proxy",
                        "type": "object",
                        "description": "Off by default (fast, works on most sites). Enable Apify Proxy for bot-protected sites that block 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
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}
```