ua-tracer by Paul Kinlan

trace kjgRquRc

ua-tracer

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

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Trace kjgRquRc

First seen: 2026-09-14 07:52:48.412 UTC
User-Agent: Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)
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
2026-09-14 07:52:48.412 UTC +0 ms homepage GET Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)
request headers (10) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
  "accept-encoding": "gzip,deflate",
  "from": "support@search.yandex.ru",
  "host": "uatracer.com",
  "traceparent": "00-b4cf571478dc8d918c0ad1fc5fa0b3f6-4fe8aa3dcd011ca4-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-b4cf571478dc8d918c0ad1fc5fa0b3f6-ec224542b53eeb3c-01",
  "x-deno-userspace-tracestate": ""
}
2026-09-18 22:55:34.086 UTC +399765674 ms apple-touch-icon GET Mozilla/5.0 (compatible; YandexFavicons/1.0; +http://yandex.com/bots)
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip,deflate",
  "from": "support@search.yandex.ru",
  "host": "uatracer.com",
  "traceparent": "00-88e8b2e08a9a6f3728181d02d4348af2-53e4bb0f2575239f-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; YandexFavicons/1.0; +http://yandex.com/bots)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-88e8b2e08a9a6f3728181d02d4348af2-82b9596f36bff27d-01",
  "x-deno-userspace-tracestate": ""
}
2026-09-18 22:55:36.641 UTC +399768229 ms favicon GET Mozilla/5.0 (compatible; YandexFavicons/1.0; +http://yandex.com/bots)
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip,deflate",
  "from": "support@search.yandex.ru",
  "host": "uatracer.com",
  "traceparent": "00-e0808ecb2d59de830e66432179b2edaa-937ce9fed3535ffd-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; YandexFavicons/1.0; +http://yandex.com/bots)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-e0808ecb2d59de830e66432179b2edaa-63bda140c7a41208-01",
  "x-deno-userspace-tracestate": ""
}