Can PluginView detect Fastly without logging in?

Yes. PluginView only reads publicly accessible responses when checking for Fastly — typically response headers. It does not bypass authentication or paywalls.

What category is Fastly?

Fastly is classified under CDN in the PluginView directory.

How many fingerprint rules cover Fastly?

This reference currently tracks 7 fingerprint rules across response headers. Individual rule bodies are proprietary and are not published.

What public signals suggest a site uses Fastly?

Illustrative public indicators for Fastly include fastly-debug-digest; vary: Fastly-SSL; x-fastly-request-id. A live scan may match additional proprietary rules beyond these examples.

Detect Fastly

CDN

Fastly is a cloud computing services provider. Fastly's cloud platform provides a content delivery network, Internet security services, load balancing, and video & streaming services.

Detection looks at response headers across 7 fingerprint rules among the site's public responses.

Websites using Fastly

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Signal classes

PluginView evaluates public page signals in these classes when identifying Fastly. Individual fingerprint rule bodies are proprietary and are not published.

Response headers

Example public indicators for Fastly

Illustrative indicators derived from public catalog metadata for Fastly. A live scan may match additional proprietary rules beyond these examples.

fastly-debug-digest
vary: Fastly-SSL
x-fastly-request-id
server: Fastly
x-fastly-origin
x-via-fastly

What a detection means

Establishes: One or more public signals on the scanned page matched a known Fastly signature (7 rules) at the time of the scan.
Does not establish: A sitewide install of Fastly, an active vendor contract, exclusive use, or that Fastly is still in place today.

How to check a site for Fastly

1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest Fastly signals.
2. PluginView reads only public responses (response headers) and scores them against the Fastly signature set (7 rules).
3. Review the confidence score and text explanation for Fastly on the results page.

FAQ: detecting Fastly

Can PluginView detect Fastly without logging in?: Yes. PluginView only reads publicly accessible responses when checking for Fastly — typically response headers. It does not bypass authentication or paywalls.
What category is Fastly?: Fastly is classified under CDN in the PluginView directory.
How many fingerprint rules cover Fastly?: This reference currently tracks 7 fingerprint rules across response headers. Individual rule bodies are proprietary and are not published.
What public signals suggest a site uses Fastly?: Illustrative public indicators for Fastly include fastly-debug-digest; vary: Fastly-SSL; x-fastly-request-id. A live scan may match additional proprietary rules beyond these examples.