ua-tracer by Paul Kinlan

trace 0VjokiX2

ua-tracer

what does a user agent actually fetch, follow & run?

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Trace 0VjokiX2

First seen: 2026-07-04 14:40:53.541 UTC
User-Agent: http.rb/5.3.1
Bot verification: Not a known bot (no IP-range check applies).

What this user agent did

Directly-referenced assets:

✗ fetched CSS ✗ fetched JS ✓ fetched image ✗ fetched font (HTML)

Document-level link hints:

✗ fetched favicon ✗ fetched apple-touch-icon ✗ fetched web manifest ✗ fetched preload ✗ fetched prefetch

Second-level follows (proves it parsed the linking file):

✗ followed CSS background-image ✗ followed CSS @font-face ✗ followed manifest icon ✗ followed CSS @import

Frames (does it descend into iframes?):

✗ fetched iframe document ✗ descended into iframe (loaded inner image)

Reporting (a report-only CSP is violated by inline styles; reports can arrive via HTTP headers with no JS, or via in-page beacons):

✗ sent a CSP/Reporting report (any path) ✗ delivered via report-uri/Report-To header (no JS) ✗ delivered via in-page beacon (securitypolicyviolation / ReportingObserver)

Social embed (Open Graph / Twitter card images):

✗ fetched og:image ✗ fetched twitter:image

JavaScript execution:

✗ EXECUTED classic JS ✗ EXECUTED ES module ✗ posted client timing

Server-side request waterfall

Every request the server received for this trace, in receive order. +ms is the delta from the homepage request.

ReceivedΔKindMethodUser-Agent
2026-07-04 14:40:53.541 UTC +0 ms homepage GET http.rb/5.3.1
request headers (7) 
{
  "accept-encoding": "gzip, deflate",
  "connection": "close",
  "host": "uatracer.com",
  "traceparent": "00-cc1350663182a876f735ae882b68aefd-b43eb65f4b305c97-01",
  "tracestate": "",
  "user-agent": "http.rb/5.3.1",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}
2026-07-04 14:40:55.287 UTC +1746 ms image GET Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko)
request headers (10) 
{
  "accept": "image/webp,image/png,image/svg+xml,image/*;q=0.8,video/*;q=0.8,*/*;q=0.5",
  "accept-encoding": "gzip, deflate, br",
  "accept-language": "en-US,en;q=0.9",
  "host": "uatracer.com",
  "traceparent": "00-cc3187c1383ec12fcd4e9343055fab81-755313a19a1eb124-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-cc3187c1383ec12fcd4e9343055fab81-c4c10dfe2f711b14-01",
  "x-deno-userspace-tracestate": ""
}