Detect HHVM
PluginView detects HHVM, a Web servers, by evaluating response headers on publicly reachable pages. Illustrative public indicators associated with HHVM include x-powered-by: HHVM/??. Full fingerprint rules remain proprietary; this page summarizes the signal classes and example indicators used for identification.
Detection looks at response headers across 1 fingerprint rules among the site's public responses.
Websites using HHVM
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Signal classes
PluginView evaluates public page signals in these classes when identifying HHVM. Individual fingerprint rule bodies are proprietary and are not published.
- Response headers
Example public indicators for HHVM
Illustrative indicators derived from public catalog metadata for HHVM. A live scan may match additional proprietary rules beyond these examples.
- x-powered-by: HHVM/??
What a detection means
- Establishes
- One or more public signals on the scanned page matched a known HHVM signature (1 rules) at the time of the scan.
- Does not establish
- A sitewide install of HHVM, an active vendor contract, exclusive use, or that HHVM is still in place today.
How to check a site for HHVM
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest HHVM signals.
- 2. PluginView reads only public responses (response headers) and scores them against the HHVM signature set (1 rules).
- 3. Review the confidence score and text explanation for HHVM on the results page.
Commonly implies
A confirmed HHVM match also implies these technologies are present.
FAQ: detecting HHVM
- Can PluginView detect HHVM without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for HHVM — typically response headers. It does not bypass authentication or paywalls.
- What category is HHVM?
- HHVM is classified under Web servers in the PluginView directory.
- How many fingerprint rules cover HHVM?
- 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 HHVM?
- Illustrative public indicators for HHVM include x-powered-by: HHVM/??. A live scan may match additional proprietary rules beyond these examples.
