Detect Arc
Arc is a peer-to-peer CDN that pays site owners for using it. Instead of expensive servers in distant datacenters, Arc's network is comprised of browsers.
Detection looks at script sources, javascript globals, dom selectors across 4 fingerprint rules among the site's public responses.
01
Websites using Arc
Loading website list…
02
Signal classes
PluginView evaluates public page signals in these classes when identifying Arc. Individual fingerprint rule bodies are proprietary and are not published.
- Script sources
- JavaScript globals
- DOM selectors
03
Example public indicators for Arc
Illustrative indicators derived from public catalog metadata for Arc. A live scan may match additional proprietary rules beyond these examples.
- arc.io/widget.js
- arc.p2pClient
- arcWidgetJsonp
- #arc-widget
04
What a detection means
- Establishes
- One or more public signals on the scanned page matched a known Arc signature (4 rules) at the time of the scan.
- Does not establish
- A sitewide install of Arc, an active vendor contract, exclusive use, or that Arc is still in place today.
05
How to check a site for Arc
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest Arc signals.
- 2. PluginView reads only public responses (script sources, javascript globals, dom selectors) and scores them against the Arc signature set (4 rules).
- 3. Review the confidence score and text explanation for Arc on the results page.
06
FAQ: detecting Arc
- Can PluginView detect Arc without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for Arc — typically script sources, javascript globals, dom selectors. It does not bypass authentication or paywalls.
- What category is Arc?
- Arc is classified under CDN in the PluginView directory.
- How many fingerprint rules cover Arc?
- This reference currently tracks 4 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 Arc?
- Illustrative public indicators for Arc include arc.io/widget.js; arc.p2pClient; arcWidgetJsonp. A live scan may match additional proprietary rules beyond these examples.
