ua-tracer by Paul Kinlan

trace TBMiJ2Ls

ua-tracer

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

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Trace TBMiJ2Ls

First seen: 2026-08-10 13:23:23.431 UTC
User-Agent: Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)
Bot verification: ⚠ NOT in Bingbot range (spoofed?) IP checked against published bot CIDR ranges; UA claims Bingbot 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
2026-08-10 13:23:23.431 UTC +0 ms homepage GET Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)
request headers (6) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-9eac90d16893b443a16aba41e2d8ecb0-a31377c9a87082c0-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}
2026-08-10 13:23:28.460 UTC +5029 ms JS GET Mozilla/5.0 (compatible; PerplexityBot/1.0; +https://perplexity.ai/perplexitybot)
request headers (6) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-c98d62cae7248f76b2bf05a758696098-4e36dfd76755fbdc-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; PerplexityBot/1.0; +https://perplexity.ai/perplexitybot)",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}
2026-08-10 13:23:28.477 UTC +5046 ms ES module GET Mozilla/5.0 (compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
request headers (6) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-f1f1ca35b8fbe578f44e757dd553a7dc-1b5d650acf291c06-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}
2026-08-10 13:23:30.509 UTC +7078 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-e2a3d8916ceb5e0e217f01d9323511ec-6f380de0c8ec7bfe-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-e2a3d8916ceb5e0e217f01d9323511ec-8be64a3bb07dfb69-01",
  "x-deno-userspace-tracestate": ""
}