27% of sites block at least one major LLM crawler, usually unintentionally at CDN/WAF ('invisible 403'); check GPTBot/ClaudeBot/PerplexityBot in server logs
How to implement →TechnicalLarge study
Technical practices that decide whether AI engines can reach your content at all: crawler access, rendering, and infrastructure — evidence-scored.
27% of sites block at least one major LLM crawler, usually unintentionally at CDN/WAF ('invisible 403'); check GPTBot/ClaudeBot/PerplexityBot in server logs
How to implement →ClaudeBot and others struggle with client-side rendering; H1 + first paragraph must be in HTML source, not lazy-loaded or in tabs
How to implement →Browse all disciplines on the full best-practices ranking.