LLM Bot Checker

What Is an LLM Bot Checker?

An LLM Bot Checker analyzes your website's robots.txt file to determine which AI crawlers — like GPTBot (OpenAI), ClaudeBot (Anthropic), PerplexityBot (Perplexity), and Google-Extended (Google AI) — are allowed or blocked from accessing your content. This directly affects whether your pages appear in AI-powered search results, chatbot responses, and AI Overviews.

Why Does AI Bot Access Matter for SEO?

AI search engines like ChatGPT, Perplexity, and Google AI Overviews are becoming primary ways users discover information. If your robots.txt blocks these AI crawlers, your content will not appear in their responses — even if you rank well in traditional search. Only about 12% of websites explicitly manage AI bot access in their robots.txt, making this an uncontested SEO opportunity.

Which AI Bots Does This Tool Check?

• GPTBot — OpenAI's crawler for ChatGPT training and retrieval
• ChatGPT-User — OpenAI's real-time browsing agent
• ClaudeBot — Anthropic's crawler for Claude AI
• PerplexityBot — Perplexity AI's search crawler
• Google-Extended — Google's Gemini/AI training crawler
• Applebot-Extended — Apple Intelligence and Siri
• CCBot — Common Crawl (used by many AI models)
• Plus 8 more AI crawlers from Meta, Amazon, ByteDance, Cohere, and You.com

How to Allow AI Bots in Your Robots.txt

To ensure AI crawlers can access your content, add explicit allow rules:

User-agent: GPTBot
Allow: /

User-agent: ClaudeBot
Allow: /

User-agent: PerplexityBot
Allow: /

User-agent: Google-Extended
Allow: /

If you want to block AI training while allowing search, you can selectively allow browsing bots like ChatGPT-User while blocking training bots like GPTBot.