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AI Crawler Access Checker

Enter your domain to see which AI crawlers — ChatGPT, Claude, Perplexity, Gemini — can access your site, and what your robots.txt means for AI search visibility.

What it checks

The tool fetches your robots.txt and parses every directive that applies to AI crawlers. It checks access status for:

  • GPTBot — OpenAI's crawler for ChatGPT and GPT model training
  • ClaudeBot — Anthropic's crawler for Claude
  • PerplexityBot — Perplexity AI's crawler for real-time search answers
  • Google-Extended — Google's opt-out token for Gemini and AI Overviews training
  • FacebookBot, Applebot-Extended, and other emerging AI user agents

Blocked vs. allowed — what it means for AI visibility

Blocking AI crawlers removes your content from the training data and real-time retrieval pipelines those models use. For most sites, that means zero citations in ChatGPT, Claude, or Perplexity answers — even when your content is the best source on the topic.

Allowing access doesn't guarantee citations, but it's a prerequisite. You can't appear in AI-generated answers if the model was never allowed to read your site.

How to use it

  1. Enter your domain — the tool fetches robots.txt from the root
  2. Review the access status for each AI crawler
  3. If a crawler is blocked and you want AI visibility — remove or adjust the Disallow directive for that user agent
  4. Re-run the check after updating your robots.txt to confirm the change took effect

When blocking makes sense

There are legitimate reasons to block AI crawlers: paywalled content, proprietary data, or sites where AI training use conflicts with licensing. If that's your situation, use targeted Disallow directives per user agent rather than a blanket block — so you can stay visible in some AI systems while opting out of others.

Frequently asked questions

Is this AI crawler checker free?

Yes, free and no signup. Enter a domain and the tool reads its robots.txt.

Should I block AI crawlers?

It depends on your goal. Block them to keep content out of AI training and answers. Allow them if you want AI visibility and citation. There is no neutral default.

How do I block an AI crawler?

Add a Disallow rule for its user-agent in robots.txt. The checker shows the current state so you can confirm the change.

Related tools: robots.txt validator and generator and llms.txt generator and validator. Background reading: AEO vs SEO.