Detect Vercel Speed Insights
Vercel Speed Insights provides you with a detailed view of your website's performance metrics, based on Core Web Vitals.
Detection looks at script sources, javascript globals, dom selectors across 3 fingerprint rules among the site's public responses.
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Websites using Vercel Speed Insights
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Signal classes
PluginView evaluates public page signals in these classes when identifying Vercel Speed Insights. Individual fingerprint rule bodies are proprietary and are not published.
- Script sources
- JavaScript globals
- DOM selectors
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Example public indicators for Vercel Speed Insights
Illustrative indicators derived from public catalog metadata for Vercel Speed Insights. A live scan may match additional proprietary rules beyond these examples.
- _vercel/speed-insights/script.js
- script
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What a detection means
- Establishes
- One or more public signals on the scanned page matched a known Vercel Speed Insights signature (3 rules) at the time of the scan.
- Does not establish
- A sitewide install of Vercel Speed Insights, an active vendor contract, exclusive use, or that Vercel Speed Insights is still in place today.
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How to check a site for Vercel Speed Insights
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest Vercel Speed Insights signals.
- 2. PluginView reads only public responses (script sources, javascript globals, dom selectors) and scores them against the Vercel Speed Insights signature set (3 rules).
- 3. Review the confidence score and text explanation for Vercel Speed Insights on the results page.
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FAQ: detecting Vercel Speed Insights
- Can PluginView detect Vercel Speed Insights without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for Vercel Speed Insights — typically script sources, javascript globals, dom selectors. It does not bypass authentication or paywalls.
- What category is Vercel Speed Insights?
- Vercel Speed Insights is classified under Analytics in the PluginView directory.
- How many fingerprint rules cover Vercel Speed Insights?
- This reference currently tracks 3 fingerprint rules across script sources, javascript globals, dom selectors. Individual rule bodies are proprietary and are not published.
- What public signals suggest a site uses Vercel Speed Insights?
- Illustrative public indicators for Vercel Speed Insights include _vercel/speed-insights/script.js; script. A live scan may match additional proprietary rules beyond these examples.
