ua-tracer by Paul Kinlan

trace R5ov22Nd

ua-tracer

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

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Trace R5ov22Nd

First seen: 2026-07-23 11:10:45.891 UTC
User-Agent: Scrapy/2.16.0 (+https://scrapy.org)
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 11:10:45.891 UTC +0 ms homepage GET Scrapy/2.16.0 (+https://scrapy.org)
request headers (8) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
  "accept-encoding": "gzip, deflate",
  "accept-language": "en",
  "host": "uatracer.com",
  "traceparent": "00-23e25bb9e8cfea44efe33339d5d4a356-3dc9a4e56623094c-01",
  "tracestate": "",
  "user-agent": "Scrapy/2.16.0 (+https://scrapy.org)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-07-23 11:12:07.732 UTC +81841 ms apple-touch-icon GET Scrapy/2.16.0 (+https://scrapy.org)
request headers (8) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
  "accept-encoding": "gzip, deflate",
  "accept-language": "en",
  "host": "uatracer.com",
  "traceparent": "00-20d50fc0796bc3c7b028bc6b131a7ac7-ebfd116c709cb7a1-01",
  "tracestate": "",
  "user-agent": "Scrapy/2.16.0 (+https://scrapy.org)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-07-23 11:12:07.737 UTC +81846 ms favicon GET Scrapy/2.16.0 (+https://scrapy.org)
request headers (8) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
  "accept-encoding": "gzip, deflate",
  "accept-language": "en",
  "host": "uatracer.com",
  "traceparent": "00-04cedc6f47c274163c522d8fc8c4c89d-b213c7fb4ad6200d-01",
  "tracestate": "",
  "user-agent": "Scrapy/2.16.0 (+https://scrapy.org)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}