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AI Crawler Access Checker

Can ChatGPT, Claude and Perplexity actually read your website? Check which search and AI crawlers your robots.txt allows — separated into training bots and the live agents that decide whether AI answers cite you.

Training crawlers

GPTBot, ClaudeBot, Google-Extended, CCBot and others collect content to train future models. Blocking them is a content-licensing stance.

Answer-time crawlers

OAI-SearchBot, ChatGPT-User, Claude-SearchBot and PerplexityBot fetch your page when a user asks a question — they are how AI assistants cite you.

Search crawlers

Googlebot and Bingbot remain the foundation. Blocking them by accident is a site-killer — this checker flags it in red immediately.

Frequently asked questions

What is the difference between GPTBot and ChatGPT-User?

GPTBot collects pages to train future models. ChatGPT-User and OAI-SearchBot fetch and cite your pages when someone asks ChatGPT a question right now. Blocking GPTBot only opts out of training.

If I block AI training crawlers, do I disappear from AI answers?

No. Training crawlers and answer-time crawlers are separate user-agents with separate robots.txt rules. Many publishers block training while staying open to citation.

What happens if my site has no robots.txt?

Every crawler is allowed by default. A missing robots.txt is not an error — but one that returns a server error is serious: Google treats it as "do not crawl".

Does robots.txt actually stop crawlers?

It is a convention, not a lock. The major operators listed here publicly commit to honouring it; it will not stop a scraper that ignores the rules.

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