Check the robots.txt rules affecting ChatGPT, Claude, Perplexity and Google AI-related crawler controls directly from your browser.
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Most crawler checks only look at a domain. The checker reads the robots.txt published at the exact origin you are on — scheme, host and port — then evaluates the rules against the page path you are actually viewing, including its query string. A site can allow crawling at the root and still block a template, a section or a single document, so a domain-level answer is often wrong for the page that matters.
Matching follows the Robots Exclusion Protocol: specific user-agent groups take precedence over the wildcard group, * and $ patterns are honoured, and the most specific matching rule wins, with Allow preferred when rules are equally specific.
OpenAI's crawler for ChatGPT search results. Controlling this token is separate from controlling GPTBot.
OpenAI's crawler used for model development. Blocking GPTBot does not block ChatGPT Search.
Anthropic's crawler for Claude search results. Separate from ClaudeBot.
Anthropic's crawler used for model development. Blocking ClaudeBot does not block Claude Search.
Used when a Claude user asks for a specific page to be fetched during a conversation.
Perplexity's crawler for search and discovery.
Google's primary search crawler.
A robots.txt control token, not a crawler. It controls whether crawled content may be used for Gemini and related Google AI products. It does not control Google Search crawling.
Results use four precise statuses: Allowed by robots.txt, Blocked by robots.txt, No robots.txt restriction detected and Unable to verify. There is no score and no percentage, because robots.txt does not support one.
Crawler access is a technical prerequisite. If a search or model crawler is blocked from a page, that page cannot be retrieved through that route at all — so any downstream outcome is off the table before content, structure or authority is considered. Blocking is often unintentional: rules copied between environments, a staging directive shipped to production, or a broad Disallow written before AI crawler tokens existed.
Checking access tells you the door is open. It does not tell you anyone walked through it.
Citations.io tracks how ChatGPT, Claude, Gemini and Perplexity answer the prompts your buyers ask, and what to change each month.