Is your site blocking AI crawlers?
Paste your domain. We read your live robots.txt through a residential proxy — exactly what an external crawler sees — and show, bot by bot, whether GPTBot, ClaudeBot, PerplexityBot, Google-Extended and the rest are allowed to read your pages. An AI assistant can only cite what it is allowed to fetch. Free, no account.
Why AI crawler access is the new SEO
Search is splitting in two. Alongside the ten blue links, buyers now ask ChatGPT, Claude, Perplexity and Google's AI answers to recommend a product, compare options or summarise a page. Those assistants can only speak about pages their crawler was allowed to fetch. If GPTBot is disallowed in your robots.txt, ChatGPT has no first-hand knowledge of your site; if ClaudeBot is blocked, the same goes for Claude. The block is often accidental — a CDN's "block AI bots" toggle, a copied robots.txt, a security default — and nobody notices, because nothing breaks in a normal browser. This tool makes that invisible decision visible.
What the checker reads
- Your live robots.txt, fetched through a residential IP so you see the file an external crawler actually receives — not a logged-in, cached or geo-specific variant.
- Every major AI user-agent, resolved against the file's rules the way a compliant crawler resolves them: the most specific matching group wins, longest path match decides, an explicit Allow overrides a Disallow of equal length.
- The exact line that grants or denies each crawler, so you can fix the file with confidence instead of guessing.
robots.txt is a request the well-behaved AI crawlers honour, not a firewall. A CDN bot rule or a WAF can still block a crawler that robots.txt allows, and a few crawlers ignore the file entirely — so a clean result here is necessary, not sufficient. A live fetch test with each crawler's user-agent is the natural next step.
From "allowed" to "actually cited"
Letting the crawlers in is step one. Being useful to them is step two: clean, structured pages an assistant can parse and quote. That is what QuanticData is built for — turning any page into LLM-ready Markdown, publishing an MCP server so agents can call your data directly, and crawling a whole site into a corpus with the crawl & map API. If you want to appear in AI answers, first stop blocking the crawlers, then feed them content they can actually use.
Questions about AI crawler access
How do I know if my site blocks AI crawlers?
Paste your domain above. The tool fetches your live robots.txt and shows, crawler by crawler, whether GPTBot, ClaudeBot, PerplexityBot, Google-Extended and the others are allowed or disallowed at your site root — with the exact rule that decides it.
Which AI crawlers does it check?
OpenAI (GPTBot, OAI-SearchBot, ChatGPT-User), Anthropic (ClaudeBot, Claude-Web, anthropic-ai), Perplexity (PerplexityBot, Perplexity-User), Google-Extended, Applebot-Extended, Amazonbot, Meta-ExternalAgent, ByteDance's Bytespider and Common Crawl's CCBot — the crawler that feeds many open models.
Why would I want AI crawlers to read my site?
Because an AI assistant can only cite, recommend or answer from pages it is allowed to fetch. If GPTBot or ClaudeBot is disallowed, your brand is invisible to ChatGPT and Claude answers — a fast-growing source of buying traffic. Many sites block these crawlers by accident through a CDN default.
Does a robots.txt rule actually stop a crawler?
For the well-behaved AI crawlers listed here, yes — they read robots.txt and honour it. robots.txt is a published request, not an enforced firewall, so a CDN bot rule or a WAF can block a crawler even when robots.txt allows it, and some crawlers ignore the file entirely. This tool reads the robots.txt signal; a live fetch test is the next step.
Is this the same as blocking scrapers?
No. This is about the named AI crawlers that respect robots.txt — the ones whose access decides whether you appear in AI answers. Blocking anonymous scrapers is a separate, IP- and fingerprint-level problem.
Is the AI crawler checker free?
Yes, and no account is needed — just a quick bot check. It reads one robots.txt per run through a residential proxy, so you see exactly what an external crawler sees, not a cached or geo-different copy.
Crawlers let in. Now be worth quoting.
Turn your pages into clean, structured data AI assistants can actually cite — $0.0002 per page, $2 free every month.
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