Is AI Allowed to Read Your Site? A 20-Minute Check for Marketing Teams

AI crawler access has to be checked provider by provider, because AI systems rely on different crawlers and search agents. A site indexed perfectly by Google can still be unavailable to ChatGPT Search, Claude Search, or Perplexity if their search agents are blocked. Google is different: Googlebot supplies Google Search crawling, including the Search infrastructure used by AI Overviews and AI Mode, while Google-Extended is a robots.txt product token instead of a separate crawler. This is a 20-minute access check any marketing team can run; some fixes still require engineering.

Highlights

• AI providers use separate controls for training, search discovery, and user-requested fetching.
• Googlebot supplies Search crawling; Google-Extended is a product-control token.
• Robots permission, successful content delivery, and AI citation are different checks.

Update, October 2026: for current data on how AI assistants recommend brands, see The State of AI Visibility 2026.

Know the agents, and the three jobs they do

Providers use different agents for model development, search, and user-requested fetching. OpenAI uses GPTBot for potential training, OAI-SearchBot for ChatGPT search discovery, and ChatGPT-User for user-requested visits. Anthropic uses ClaudeBot for model development, Claude-SearchBot for search, and Claude-User for user-directed retrieval. Perplexity uses Perplexity Bot for search and Perplexity-User for user-requested fetches. Google is different: Googlebot handles Google Search crawling, including Search features such as AI Overviews and AI Mode. Google-Extended is not a separate HTTP crawler; it is a robots.txt product token that controls certain Gemini training and grounding uses of content Google has already crawled.

Avoid a costly mistake

Blocking GPTBot does not by itself block OAI-SearchBot. Review search discovery and user-requested fetches separately under each provider’s documented rules. A blocked search crawler can limit access or eligibility, but the effect of a user fetcher and the resulting citation behavior varies by product.

Check your GPTBot robots.txt rules and the other AI agents

Open your-domain.com/robots.txt and inspect the rules for OAI-SearchBot, GPTBot, Claude-SearchBot, ClaudeBot, PerplexityBot, Googlebot, and user-requested fetchers where relevant. A block on a search crawler can reduce eligibility for that provider’s search experience. A block on a training crawler controls model-development use, not search indexing. Google-Extended should be reviewed as a product-control token, not as a crawler. Also check CDN and WAF rules, because robots.txt can allow a bot while the edge still returns a 403 response.

Check for a CDN or firewall that overrides the file

A clean robots.txt is not enough if your CDN is blocking bots above it. Cloudflare and similar services ship a one-click control that blocks AI bots. It is easy to enable by accident, and it silently overrides your file. Confirm no firewall or bot-management rule is treating the search agents as scrapers. This is where a marketing team usually needs a quick word with whoever owns the CDN.

Confirm the models can actually read the content

Access is not the same as legibility. If your key content loads through JavaScript that the fetchers do not run, the page can be reachable and still effectively empty to a model. Confirm your important facts are present in the served HTML, not painted in after load. View the page source, not the rendered page, and search for the fact you need a model to find.

Verify from your logs, and know the limits

Filter server logs for the published agents, then verify the traffic using that provider’s current IP ranges or documented verification method. Do not rely on the user-agent string alone or assume reverse DNS is the correct method for every provider. A successful fetch demonstrates access; it does not establish indexing or influence on an AI answer.

Next steps

 Start GEO growth with NeuroRank.