ua-tracer by Paul Kinlan

trace zUCQ0g7Q

ua-tracer

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

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Trace zUCQ0g7Q

First seen: 2026-07-23 09:06:05.057 UTC
User-Agent: Mozilla/5.0 (compatible; CensysInspect/1.1; +https://about.censys.io/)
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
2026-07-23 09:06:05.057 UTC +0 ms homepage GET Mozilla/5.0 (compatible; CensysInspect/1.1; +https://about.censys.io/)
request headers (7) 
{
  "accept": "*/*",
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-ee11c2cb57bd392b42b640bc1043053f-276ff5c607d523a2-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; CensysInspect/1.1; +https://about.censys.io/)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-07-23 09:06:08.177 UTC +3120 ms favicon GET Mozilla/5.0 (compatible; CensysInspect/1.1; +https://about.censys.io/)
request headers (9) 
{
  "accept-encoding": "gzip",
  "connection": "close",
  "host": "uatracer.com",
  "traceparent": "00-006c5a33d3e1bd1b258ee72ac869549a-77962ec4349cf4c0-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; CensysInspect/1.1; +https://about.censys.io/)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-006c5a33d3e1bd1b258ee72ac869549a-495f14ff44a41675-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-23 09:06:11.908 UTC +6851 ms apple-touch-icon GET Mozilla/5.0 (compatible; CensysInspect/1.1; +https://about.censys.io/)
request headers (9) 
{
  "accept-encoding": "gzip",
  "connection": "close",
  "host": "uatracer.com",
  "traceparent": "00-2d6891acb0458aa3e5bc4fb30b982447-733bb9a72bf20440-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; CensysInspect/1.1; +https://about.censys.io/)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-2d6891acb0458aa3e5bc4fb30b982447-8f925386b6396ca2-01",
  "x-deno-userspace-tracestate": ""
}