ua-tracer by Paul Kinlan

trace XmK1gwar

ua-tracer

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

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Trace XmK1gwar

First seen: 2026-08-23 06:24:27.755 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
2026-08-23 06:24:27.755 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": "00-24f2e1b26e92cebb84f12e753db969a9-90899d6264b69737-01",
  "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": "00-24f2e1b26e92cebb84f12e753db969a9-547e6f1a13a30097-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-25 18:10:58.449 UTC +215190694 ms apple-touch-icon GET Mozilla/5.0 (compatible; YandexFavicons/1.0; +http://yandex.com/bots)
request headers (8) 
{
  "accept": "*/*",
  "accept-encoding": "gzip,deflate",
  "from": "support@search.yandex.ru",
  "host": "uatracer.com",
  "traceparent": "00-cc35548848cf04cc0a830b13c9f75d96-f3b4880e2974df4a-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; YandexFavicons/1.0; +http://yandex.com/bots)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-25 18:11:05.585 UTC +215197830 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": "00-050fa7409ab148b0d1b9f659f9c3623a-c793a58c1de0b615-01",
  "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": "00-050fa7409ab148b0d1b9f659f9c3623a-47d9cf6e9fbd80df-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-25 19:12:46.089 UTC +218898334 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-d763dcdc9ef6321067e824bdd1f4126e-8e7ed2423f1bc050-01",
  "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-d763dcdc9ef6321067e824bdd1f4126e-bf29d75619dbb934-01",
  "x-deno-userspace-tracestate": ""
}
2026-09-03 01:29:15.555 UTC +932687800 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": "00-8382ac862dade9c4a94e779bca015029-c0b8e854f165fd94-01",
  "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": "00-8382ac862dade9c4a94e779bca015029-f38da6e230f8b810-01",
  "x-deno-userspace-tracestate": ""
}
2026-09-03 01:29:15.646 UTC +932687891 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": "00-74fa99001c5f1b991c19226aa81636b8-48413aa851e38951-01",
  "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": "00-74fa99001c5f1b991c19226aa81636b8-a6456df424a37d61-01",
  "x-deno-userspace-tracestate": ""
}