ua-tracer by Paul Kinlan

trace mt02JfjC

ua-tracer

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

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Trace mt02JfjC

First seen: 2026-07-03 04:17:26.597 UTC
User-Agent: python-urllib3/2.2.3
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
2026-07-03 04:17:26.597 UTC +0 ms homepage GET python-urllib3/2.2.3
request headers (22) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
  "accept-charset": "ISO-8859-1,utf-8;q=0.7,*;q=0.7",
  "accept-encoding": "gzip, deflate",
  "accept-language": "en-US,en;q=0.9,de;q=0.8",
  "baggage": "sentry-trace_id=a2d66057bf96453199b042d0cbbbc86b,sentry-sample_rand=0.830599,sentry-environment=production,sentry-release=spn%401.2.12,sentry-public_key=0244fd5f8d7d3c2c4686513c84141e54,sentry-transaction=save,sentry-sample_rate=0.0,sentry-sampled=false",
  "cache-control": "max-age=0",
  "connection": "close",
  "host": "uatracer.com",
  "keep-alive": "300",
  "sec-ch-ua": "\"Google Chrome\";v=\"130\", \"Chromium\";v=\"130\", \"Not.A/Brand\";v=\"99\"",
  "sec-ch-ua-mobile": "?0",
  "sec-ch-ua-platform": "\"Windows\"",
  "sec-fetch-dest": "document",
  "sec-fetch-mode": "navigate",
  "sentry-trace": "a2d66057bf96453199b042d0cbbbc86b-920a643fadb5eae5-0",
  "traceparent": "00-9b7f3e3671f4f559c039bb78fad3d732-61319fba6ea50e8b-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "python-urllib3/2.2.3",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-9b7f3e3671f4f559c039bb78fad3d732-353f204e48339204-01",
  "x-deno-userspace-tracestate": ""
}