ua-tracer by Paul Kinlan

trace XVKP7SaP

ua-tracer

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

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Trace XVKP7SaP

First seen: 2026-07-03 04:12:56.762 UTC
User-Agent: HackerNews/1566 CFNetwork/3889.100.1 Darwin/27.0.0
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 04:12:56.762 UTC +0 ms homepage GET HackerNews/1566 CFNetwork/3889.100.1 Darwin/27.0.0
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br",
  "accept-language": "en-US,en;q=0.9",
  "host": "uatracer.com",
  "priority": "u=3",
  "traceparent": "00-fbdcbcbbea95d5ba7ea5fb0702cb6b8d-1d9276b963a81c92-01",
  "tracestate": "",
  "user-agent": "HackerNews/1566 CFNetwork/3889.100.1 Darwin/27.0.0",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-fbdcbcbbea95d5ba7ea5fb0702cb6b8d-2d0328b37e5be018-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-03 04:12:58.049 UTC +1287 ms Open Graph image GET HackerNews/1566 CFNetwork/3889.100.1 Darwin/27.0.0
request headers (12) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br",
  "accept-language": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=XVKP7SaP",
  "host": "uatracer.com",
  "priority": "u=3",
  "traceparent": "00-1a35e7431ebc309a190170ac091b7a91-f1162fb730165f86-01",
  "tracestate": "",
  "user-agent": "HackerNews/1566 CFNetwork/3889.100.1 Darwin/27.0.0",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-1a35e7431ebc309a190170ac091b7a91-cfc2a17f3d4150f0-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-03 04:13:33.920 UTC +37158 ms Open Graph image GET HackerNews/1566 CFNetwork/3889.100.1 Darwin/27.0.0
request headers (12) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br",
  "accept-language": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=XVKP7SaP",
  "host": "uatracer.com",
  "priority": "u=3",
  "traceparent": "00-95d56336081ecce111e8e4a9085c0228-cf86fe0c44da6c3f-01",
  "tracestate": "",
  "user-agent": "HackerNews/1566 CFNetwork/3889.100.1 Darwin/27.0.0",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-95d56336081ecce111e8e4a9085c0228-e47e0b62ff972be4-01",
  "x-deno-userspace-tracestate": ""
}