Detect X-Clacks-Overhead
X-Clacks-Overhead is a non-standard HTTP header used to transmit tribute messages within server responses.
Detection looks at response headers across 1 fingerprint rules among the site's public responses.
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Websites using X-Clacks-Overhead
Loading website list…
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Signal classes
PluginView evaluates public page signals in these classes when identifying X-Clacks-Overhead. Individual fingerprint rule bodies are proprietary and are not published.
- Response headers
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Example public indicators for X-Clacks-Overhead
Illustrative indicators derived from public catalog metadata for X-Clacks-Overhead. A live scan may match additional proprietary rules beyond these examples.
- x-clacks-overhead: GNU Terry Pratchett
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What a detection means
- Establishes
- One or more public signals on the scanned page matched a known X-Clacks-Overhead signature (1 rules) at the time of the scan.
- Does not establish
- A sitewide install of X-Clacks-Overhead, an active vendor contract, exclusive use, or that X-Clacks-Overhead is still in place today.
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How to check a site for X-Clacks-Overhead
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest X-Clacks-Overhead signals.
- 2. PluginView reads only public responses (response headers) and scores them against the X-Clacks-Overhead signature set (1 rules).
- 3. Review the confidence score and text explanation for X-Clacks-Overhead on the results page.
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FAQ: detecting X-Clacks-Overhead
- Can PluginView detect X-Clacks-Overhead without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for X-Clacks-Overhead — typically response headers. It does not bypass authentication or paywalls.
- What category is X-Clacks-Overhead?
- X-Clacks-Overhead is classified under Miscellaneous in the PluginView directory.
- How many fingerprint rules cover X-Clacks-Overhead?
- This reference currently tracks 1 fingerprint rule across response headers. Individual rule bodies are proprietary and are not published.
- What public signals suggest a site uses X-Clacks-Overhead?
- Illustrative public indicators for X-Clacks-Overhead include x-clacks-overhead: GNU Terry Pratchett. A live scan may match additional proprietary rules beyond these examples.
