ua-tracer by Paul Kinlan

trace 5j5jCzrB

ua-tracer

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

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Trace 5j5jCzrB

First seen: 2026-07-15 13:56:31.904 UTC
User-Agent: Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
Bot verification: ⚠ NOT in Googlebot range (spoofed?) IP checked against published bot CIDR ranges; UA claims Googlebot but IP not in published range.

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
2026-07-15 13:56:31.904 UTC +0 ms homepage GET Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
request headers (6) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-2c5d46ffed410cf0afad2c32ec001169-04720c312f24888c-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}
2026-07-15 13:56:33.599 UTC +1695 ms ES module GET Mozilla/5.0 (compatible; OAI-SearchBot/1.3; +https://openai.com/searchbot)
request headers (6) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-9805fa084c59ada7ce5ec29c8aeebab3-3c9fa91edb0c1754-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; OAI-SearchBot/1.3; +https://openai.com/searchbot)",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}
2026-07-15 13:56:33.602 UTC +1698 ms JS GET Mozilla/5.0 (compatible; Google-CloudVertexBot; +https://cloud.google.com/vertex-ai-bot)
request headers (6) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-78631cd8c0730472f3c3a4c630d7621d-b9ae440508ae1250-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; Google-CloudVertexBot; +https://cloud.google.com/vertex-ai-bot)",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}
2026-07-15 13:56:34.586 UTC +2682 ms web app manifest GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.3; +https://openai.com/gptbot)
request headers (8) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-2b71d1e4989921896006b17eaedd7543-811c85c3a75c3b85-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.3; +https://openai.com/gptbot)",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-2b71d1e4989921896006b17eaedd7543-b8a2a0957d2c8b59-01",
  "x-deno-userspace-tracestate": ""
}