Websites May Be Invisible to AI Chatbots Due to Crawler Blocking and Rendering Issues
A developer found that a site ranking well on Google was never mentioned by ChatGPT, Claude, or Perplexity when asked about its topic. Investigation revealed that the robots.txt file was blocking AI crawlers, the content relied on JavaScript rendering, and no structured data was present. The author built free online checkers to test robots.txt rules against 21 AI bots, show what crawlers see on a page, and score AI visibility. The article advises that site owners can explicitly allow AI bots like GPTBot, ClaudeBot, and PerplexityBot in robots.txt if they want their content used by AI tools.
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