AI search engines read your site differently from Google. Run the free AI Visibility Checker to see whether ChatGPT, Claude, and Perplexity can reach, read, and cite your pages.
Your robots.txt can say every AI crawler is welcome while your CDN or firewall quietly turns them away at the network level. A robots.txt checker cannot see this. We run the request both ways and compare.
A single fetch, checked against every gate between the AI crawler and your content.
Your firewall is blocking AI crawlers even though robots.txt allows them. Your pages never reach ChatGPT, Claude, or Perplexity, and robots.txt cannot fix it.
Nine checks decide whether AI search engines can reach, read, and cite your site. Every one runs on the free tier.
Checks for a valid llms.txt at your root, the curated markdown summary AI assistants read to represent your site accurately.
Confirms robots.txt lets the AI search agents (OAI-SearchBot, PerplexityBot, Claude-User, Google-Extended) reach your pages.
Probes your site as GPTBot to catch a CDN or firewall blocking AI crawlers at the network level even when robots.txt allows them.
Looks for Organization, Person, or WebSite JSON-LD with a name and url so AI engines can identify and cite your brand.
Detects FAQPage, HowTo, or QAPage markup, the answer-format schema AI assistants preferentially surface.
Verifies pages wrap primary content in main or article landmarks so LLMs can isolate it from navigation and chrome.
Checks for machine-readable publish or modified dates that answer engines use to judge how current your content is.
Looks for named author markup on articles, an E-E-A-T signal AI engines weigh when deciding what to cite.
Finds H2 and H3 headings phrased as the questions users actually ask, which AI answers preferentially lift from.
The nine checks roll up into a single 0-100 sub-score that sits inside every audit, right next to your overall score.
How ready your site is to be read and cited by AI search engines like ChatGPT, Perplexity, and Google AI. 6 of 9 AI Visibility checks passed.
This is the compact card as it appears in the audit summary, so the number on the marketing page and the number in your report always match.
Each check earns full credit for a pass, half for a warning, and none for a fail. We divide by the checks that actually ran, so a measurement that could not complete never drags your score down.
Three walkthroughs that unpack the checks above, from crawler access to citation.
GPTBot, ClaudeBot, PerplexityBot, Google-Extended and the rest: the robots.txt patterns, the tradeoffs of blocking, and how a CDN can turn AI crawlers away.
The six on-page signals (schema, semantic structure, question headings, author, freshness) that make your content easy for an answer engine to lift and attribute.
Two small files at your root, two opposite jobs. What each one does, and why one is not a substitute for the other.
AI Visibility is how ready your site is to be reached, read, and cited by AI search engines like ChatGPT, Claude, Perplexity, and Google AI. It is measured by nine checks that roll up into a 0-100 score inside every AuditZap report.
The most common reason is a CDN or firewall that blocks AI crawlers at the network level, even when your robots.txt allows them. Missing entity schema, no machine-readable dates, and no llms.txt file also make it harder for AI engines to read and cite you.
Traditional SEO optimises for how Google ranks and links to pages. AI Visibility optimises for whether answer engines can fetch your content and quote it directly in an answer. The signals overlap, but AI engines weight things like crawler access, entity schema, and question-format content that classic SEO tools do not surface.
No. Blocking AI training or search crawlers such as GPTBot, OAI-SearchBot, PerplexityBot, or Google-Extended has no effect on your Google Search rankings, which are driven by Googlebot; only blocking Googlebot itself removes you from Google. The AI crawlers are a separate question: blocking the training crawlers is a legitimate content-licensing choice, while blocking the search and citation agents removes your site from live AI answers. The check separates the two so you can decide each on its own terms.
Yes. The AI Visibility score and all nine checks run on the free tier. Pro adds AI-written fix instructions for each issue, tailored to your CMS, plus PDF export and automatic re-audits.
We fetch your site twice: once with a normal browser identity and once identifying as GPTBot. When the browser request succeeds but the GPTBot request is turned away with a 403, 429, or 503, your CDN or firewall is blocking AI crawlers regardless of what robots.txt says.
Run the free AI Visibility Checker on any URL and get your 0-100 score in seconds. No credit card, no sign-up to scan.
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