ua-tracer by Paul Kinlan

trace yDb7xhQl

ua-tracer

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

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Trace yDb7xhQl

First seen: 2026-09-24 00:52:39.548 UTC
User-Agent: lawa/0.1 (i'm studying the world of HTTP headers! am i abusing you, or do you just want to say hi? email robin@dreamstation.systems https://dreamstation.systems/personal/lawa.html)
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
2026-09-24 00:52:39.548 UTC +0 ms homepage GET lawa/0.1 (i'm studying the world of HTTP headers! am i abusing you, or do you just want to say hi? email robin@dreamstation.systems https://dreamstation.systems/personal/lawa.html)
request headers (11) 
{
  "accept": "text/html,application/xhtml+xml;q=0.9,*/*;q=0.5",
  "accept-encoding": "gzip",
  "connection": "close",
  "from": "robin@dreamstation.systems",
  "host": "uatracer.com",
  "traceparent": "00-ad39d1758796f2a7c337a83ffaa623fe-ab7c05344e4a418d-01",
  "tracestate": "",
  "user-agent": "lawa/0.1 (i'm studying the world of HTTP headers! am i abusing you, or do you just want to say hi? email robin@dreamstation.systems https://dreamstation.systems/personal/lawa.html)",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-ad39d1758796f2a7c337a83ffaa623fe-f07364a45a32ad91-01",
  "x-deno-userspace-tracestate": ""
}