Detect Fly.io
Fly is a platform for running full stack apps and databases.
Detection looks at response headers, cookies across 4 fingerprint rules among the site's public responses.
01
Websites using Fly.io
Loading website list…
02
Signal classes
PluginView evaluates public page signals in these classes when identifying Fly.io. Individual fingerprint rule bodies are proprietary and are not published.
- Response headers
- Cookies
03
Example public indicators for Fly.io
Illustrative indicators derived from public catalog metadata for Fly.io. A live scan may match additional proprietary rules beyond these examples.
- fly-request-id
- server: Fly/ .*
- via: .* fly.io
- _fly
04
What a detection means
- Establishes
- One or more public signals on the scanned page matched a known Fly.io signature (4 rules) at the time of the scan.
- Does not establish
- A sitewide install of Fly.io, an active vendor contract, exclusive use, or that Fly.io is still in place today.
05
How to check a site for Fly.io
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest Fly.io signals.
- 2. PluginView reads only public responses (response headers, cookies) and scores them against the Fly.io signature set (4 rules).
- 3. Review the confidence score and text explanation for Fly.io on the results page.
06
FAQ: detecting Fly.io
- Can PluginView detect Fly.io without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for Fly.io — typically response headers, cookies. It does not bypass authentication or paywalls.
- What category is Fly.io?
- Fly.io is classified under PaaS in the PluginView directory.
- How many fingerprint rules cover Fly.io?
- This reference currently tracks 4 fingerprint rules across response headers, cookies. Individual rule bodies are proprietary and are not published.
- What public signals suggest a site uses Fly.io?
- Illustrative public indicators for Fly.io include fly-request-id; server: Fly/ .*; via: .* fly.io. A live scan may match additional proprietary rules beyond these examples.
