SEO Audit & Broken Link Checker (Website Crawler)

Crawl a website and get an SEO audit of every page plus a check of every link and image on those pages. Each page gets a 0-100 score, a list of issues with a fix for each one, and its broken links. Each site gets a summary: top issues, duplicate titles and descriptions, broken links with the pages they're on, robots.txt, sitemap, HTTPS and certificate checks.

It reads pages over plain HTTP without a browser, so it is fast and cheap: $4 per 1,000 pages audited, and link checks are free.

Who it's for

• SEO freelancers and agencies: a technical and on-page site audit as data, ready for a client report or a spreadsheet
• Site owners and developers: find 404s, broken images, redirect chains and missing titles before Google does; run it on a schedule
• Content teams: spot thin pages, duplicate titles and missing meta descriptions across a blog
• AI agents: a factual snapshot of a site's SEO state to base recommendations on

What gets checked

Area	Checks
Meta	title missing, too short (<30) or too long (>60), several titles; meta description missing, too short (<70) or too long (>160); titles and descriptions repeated across the site's indexable pages
Headings	missing, empty or several <h1>; heading levels that skip a step; count of h1-h6
Content	word count of the main content (navigation, header and footer left out); thin pages under 200 words
Indexing	noindex in meta robots or the X-Robots-Tag header, canonical missing, several canonicals, canonical pointing elsewhere, page listed in the XML sitemap or not
Technical	HTTP status and redirect chain, response time, HTML size, compression, HTTPS, mixed content, mobile viewport, lang, doctype, URL hygiene
Links	every internal and external link checked (HEAD, then GET when a server answers HEAD wrongly): broken links (404, 410, 5xx, dead domains), internal links that redirect, internal http:// links, links without anchor text, nofollow
Images	every image checked for errors; images without an alt attribute
Structured data	JSON-LD types (including @graph), invalid JSON-LD, microdata types
Social	Open Graph title, description and image; Twitter card
Site	robots.txt (and which AI crawlers it blocks: GPTBot, ClaudeBot, PerplexityBot, Google-Extended...), sitemaps (indexes and .gz followed), HTTP to HTTPS redirect, www / non-www redirect, days until the TLS certificate expires

Input

{
  "startUrls": ["https://example.com"],
  "maxPages": 50,
  "checkExternalLinks": true,
  "excludeUrlPatterns": ["/tag/", "?replytocom="]
}

Several sites can go in one run; each is crawled and summarised on its own. Start URLs of the same site are crawled together.

Output

Two kinds of items in the dataset, told apart by type.

page (one per audited page; this is what you pay for):

{
  "type": "page",
  "url": "https://books.toscrape.com/catalogue/category/books/travel_2/index.html",
  "score": 75,
  "title": "Travel | Books to Scrape - Sandbox",
  "metaDescription": "",
  "h1": ["Travel"],
  "wordCount": 117,
  "indexable": true,
  "canonical": null,
  "responseTimeMs": 417,
  "issueCounts": {"error": 0, "warning": 3, "notice": 4},
  "linkCounts": {"internal": 63, "external": 0, "nofollow": 0, "broken": 0, "images": 11},
  "brokenLinks": [],
  "issues": [
    {"id": "description-missing", "category": "meta", "severity": "warning",
     "message": "The page has no meta description.",
     "fix": "Add a meta description of 70-160 characters that sums up the page."},
    {"id": "mixed-content", "category": "technical", "severity": "warning",
     "message": "The HTTPS page loads resources over plain HTTP.",
     "fix": "Load every script, style, image and frame over HTTPS.",
     "count": 1, "examples": ["http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"]}
  ]
}

A broken link found on a real blog post (Cloudflare's blog, during testing): {"url": "https://github.com/cloudflare/templates/tree/main/worker-d1-api", "status": 404, "text": "cloudflare/templates/worker-d1-api"}.

site-summary (one per site, free): averageScore, scoreDistribution, topIssues (each with the number of pages it affects and the fix), brokenLinks (each with up to 5 pages it was found on), duplicateTitles, duplicateDescriptions, robotsTxt, sitemap, technical, errorPages, pagesNotInSitemap, linksChecked, linksUnverified.

Scoring

Each page starts at 100. Every issue takes off points by weight (a missing title costs 15, broken links 12, a missing meta description 8, a too-long title 4, small notices 1-2). An issue found many times on one page costs at most twice its weight. Issues are sorted errors first.

Speed

Measured runs: 10 pages and 333 links in 11 seconds; 15 pages of a large blog with 1,940 links checked in 85 seconds. Most of the time goes into checking links; set maxLinkChecks or turn off checkExternalLinks for faster runs.

Honest limits

• No browser. Pages are read as the server sends them. Content that only appears after JavaScript runs is not seen, and Core Web Vitals and accessibility contrast checks are not measured. Use a Lighthouse-based tool for those.
• Bot protection. Some sites answer automated requests with 403 or 429. Those links are listed under linksUnverified, not counted as broken, and a site that turns the crawler away entirely is not charged.
• Polite by default. robots.txt is respected, at most 4 requests per server at a time, and a server that answers 429 is paused before retrying. Turn off respectRobotsTxt only for your own site.
• Pages behind a login are out of scope.

Pricing

$0.004 per audited page ($4 per 1,000 pages). The site summary, robots.txt and sitemap checks and all link checks are free. maxPages caps the cost per site, and the crawl stops cleanly at your run's spending limit.

Use it from code

curl -X POST "https://api.apify.com/v2/acts/prometheus-maker~website-seo-audit/run-sync-get-dataset-items" \
  -H "Authorization: Bearer $APIFY_TOKEN" -H "Content-Type: application/json" \
  -d '{"startUrls": ["https://example.com"], "maxPages": 20}'

More examples: apify-tools-examples.

Related tools

• Website Tech Stack Detector: what a website is built with: CMS, analytics, CDN, hosting
• Website Screenshot API: full-page and mobile screenshots of any list of pages
• Website to Markdown Crawler: a whole site as clean Markdown for AI and RAG

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