KI Crawler Checker for ChatGPT, Google, Claude and Perplexity
Free individual check · without registration
Check if key search and response systems can technically reach your website: robots.txt rules, sitemap hints, search bots, training bots and selected live requests with bot user agents.
Robots evaluation and technical bot probes.
Search/response bots are more critical for visibility than pure training opt-outs.
| Bott | Purpose | Robots | Live sample | Assessment |
|---|---|---|---|---|
| No data yet. | ||||
AI Search, Training and User Fetch Clean Separation
The check distinguishes between search/source bots, training bots and user-initiated retrievals. This is important because a training opt-out is not the same as a blockage of your own discoverability in AI-related search systems.
Googlebot, OAI-SearchBot, Claude-SearchBot and PerplexityBot are particularly important for source and search visibility.
GPTBot, ClaudeBot and Google-Extended are rated differently because blockades can be deliberately intentional.
Selected user agents are tested live to make 403, 406, 429 or other bot blockades visible.
Sitemaps in robots.txt help search systems find important URLs faster and classify changes.
Useful next checks
Crawler access alone is not enough. AI visibility also includes indexability, entity clarity, structured data, content quality and internal linking.
Why AI Crawler Access May Be Relevant for Google Rankings
An AI crawler checker is not a ranking promise. However, it closes a technical gap that is overlooked in many SEO audits: The same server, robots.txt, CDN and WAF rules that hit AI-related crawlers can also influence Googlebot, Bingbot, important source retrievals or the evaluation of sitemaps. If you want to keep or expand good Google rankings, you should not only optimize content, but regularly check whether relevant bots can retrieve the most important URLs cleanly.
This is particularly critical for relaunches, bot protection rules, security plugins, Cloudflare/Akamai/Fastly configurations, international geoblocking, staging locks and accidentally adopted disallow rules. The check makes it visible whether a URL for search bots, AI search bots and user-initiated retrievals is plausibly accessible.
If Googlebot is blocked, crawling, indexing and ranking potential are directly affected.
OAI-SearchBot, Claude-SearchBot and PerplexityBot should be rated differently than pure training bots.
Specific user-agent groups, fallback rules and long disallow paths can unexpectedly overlap.
HTTP 403, 406 or 429 despite allowed robots.txt are a strong signal for server or bot protection issues.
Common Causes of Blocked AI and Search Crawlers
Many blockages do not arise intentionally. Security rules were often tightened, staging rules adopted or bot-user-agents blocked in general. In the end, SEO does not count on the intention, but whether important pages remain reliably retrievable, indexable and machine-readable.
An old relaunch block like Disallow: / or Disallow: /de/ It quickly hits more bots than planned.
Blocking GPTBot may be intentional; blocking OAI SearchBot or Googlebot is significantly riskier for visibility.
Without a sitemap hint in robots.txt, search systems lack a simple discovery path to important URLs.
Firewall rules sometimes recognize real crawlers as scrapers and deliver 403, 406, captcha pages or rate limits.
www, non-www, http and https can deliver different robots.txt files, redirects or security rules.
Important landing pages, product pages and guides should be checked separately because path rules work per URL.
How to Use the AI Crawler Checker in SEO Audit
- 1. Check the start page: This lets you see if domain, robots.txt, sitemap hints, and basic bot access are plausible.
- 2. Check important landing pages: Especially SEO pages, product pages and guides can be blocked by specific path rules.
- 3. Evaluate search bots first: Googlebot, OAI-SearchBot, Claude-SearchBot and PerplexityBot are more critical for findability than pure training bots.
- 4. Take a live sample: If robots.txt is allowed, but the call provides 403, 406, 429 or 5xx, the suspicion of WAF, CDN or server configuration is obvious.
- 5. Connecting with indexability and schema: Accessibility, indexability, structured data and entity signals belong together.
Practice classification
Check AI crawlers, classic bots and access protection together
The AI Crawler Checker considers whether important bots such as GPTBot, ChatGPT user, OAI SearchBot, ClaudeBot, PerplexityBot or Googlebot are restricted by robots.txt, server rules, CDN, WAF or header. For modern visibility, it is no longer enough to only check the classic Googlebot. AI search systems, response machines and training or retrieval crawlers can be treated differently depending on the user agent.
Especially with websites with security services, unintended differences arise. A bot is allowed to crawl according to robots.txt, but is blocked by the CDN. Or a classic bot gets HTML while an AI crawler sees a challenge page. Such differences can influence whether content is reliably understood in AI responses, search previews or external knowledge systems.
Interpreting bot signals correctly
| Finding | Possible cause | Next step |
|---|---|---|
| robots.txt allows access | Crawling is formally possible. | Additionally, check server response and delivered content. |
| User agent is blocked | WAF, CDN or bot management intervenes. | Check rules and specifically allow desired bots. |
| Different HTML versions | Rendering, personalization or protection system changes the answer. | Comparison with normal browser and Googlebot. |
| X-Robots tag blocks content | Server sets indexing directives outside of HTML. | Control header rules and CMS plugins. |
| Crawler sees little main content | JavaScript, Consent or Lazy Loading covers up content. | Make important content available on the server side and early in the HTML. |
Technically securing AI visibility
- 1 Check robots.txt for classic and AI-related user agents.
- 2 Test important page types with multiple bot perspectives.
- 3 Differentiate blockades according to the desired strategy: consciously block or accidentally fix them.
- 4 Connect results with structured data, internal linking and llms.txt logic.
Particularly critical are
- Important content that only appears after JavaScript or Consent
- Bot rules that inadvertently treat search engines and AI retrieval systems differently
- Protective pages, captchas or 403 responses for desired crawlers
- Contradictory signals between robots.txt, meta robots and HTTP headers
Frequently Asked Questions about AI Crawler Checker
The most important questions around ChatGPT Crawler, Googlebot, Google-Extended, ClaudeBot, PerplexityBot, robots.txt and technical bot blockades.
What does the AI Crawler Checker specifically check?
He checks the robots.txt of the domain, sitemap hints, matching user agent rules and selected live requests for Googlebot, OAI-SearchBot, GPTBot, Claude-SearchBot, ClaudeBot and PerplexityBot.
Is a blocked GPTBot bad for SEO?
Not automatically. GPTBot is not a classic search bot. A conscious training opt-out can be legitimate. More critical are blockades for Googlebot, OAI-SearchBot, Claude-SearchBot or other search/source bots.
Why can't Google Extended be tested live?
Google-Extended is a robots.txt token and not its own HTTP user agent. Therefore, the tool evaluates the robots.txt rules here, but does not simulate a separate live retrieval.
Why does the tool distinguish search bots and training bots?
Search bots potentially affect findability, source retrieval and search. Training bots are more concerned with model training or policy control. Therefore, a blockade is not equally critical in both cases.
Which URL Should I Test?
Start with the homepage and then check important landing pages, product pages, guides, category pages and pages with organic sales potential separately.
What is the next step in a critical outcome?
Check robots.txt, CDN/WAF rules, status codes, redirects and server logs. For business-critical sites, a manual classification with a concrete fixed plan is worthwhile.