ua-tracer by Paul Kinlan

trace PCB6yLCx

ua-tracer

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

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Trace PCB6yLCx

First seen: 2026-08-06 18:07:58.892 UTC
User-Agent: Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)
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
2026-08-06 18:07:58.892 UTC +0 ms homepage GET Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)
request headers (8) 
{
  "accept-encoding": "gzip",
  "accept-language": "zh-CN",
  "connection": "Keep-Alive",
  "host": "uatracer.com",
  "traceparent": "00-1e9e02af6e9d8c8fe27c0c42aa2be630-c2d9e1b37635749f-01",
  "tracestate": "",
  "user-agent": "Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-06 21:21:57.037 UTC +11638145 ms image GET Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36
request headers (9) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,image/svg+xml,image/gif,image/*,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
  "accept-encoding": "gzip, deflate",
  "connection": "keep-alive",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-fdd564bb81c2c27b827f08ce9a6920dc-63059e72e70614a2-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}