ua-tracer by Paul Kinlan

trace 4Uim7o3P

ua-tracer

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

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Trace 4Uim7o3P

First seen: 2026-06-22 12:06:36.383 UTC
User-Agent: Mozilla/5.0 (compatible; SummalyBot/5.2.5-io.4)
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
2026-06-22 12:06:36.383 UTC +0 ms homepage GET Mozilla/5.0 (compatible; SummalyBot/5.2.5-io.4)
request headers (11) 
{
  "accept": "text/html,application/xhtml+xml",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "ja-JP",
  "connection": "keep-alive",
  "host": "ua-tracer.paulkinlan-ea.deno.net",
  "traceparent": "00-234c578b89dba9189d06028ea444432f-b621aa866c1293c0-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; SummalyBot/5.2.5-io.4)",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-234c578b89dba9189d06028ea444432f-fb0a69864b8b5433-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-22 12:06:37.031 UTC +648 ms favicon HEAD got (https://github.com/sindresorhus/got)
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "connection": "keep-alive",
  "host": "ua-tracer.paulkinlan-ea.deno.net",
  "traceparent": "00-83758a783e1d63d20d2a1fce5b088379-a93ffced25adcbc2-01",
  "tracestate": "",
  "user-agent": "got (https://github.com/sindresorhus/got)",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-83758a783e1d63d20d2a1fce5b088379-4d29cdfb8bd7a058-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-22 12:06:38.403 UTC +2020 ms favicon GET MisskeyMediaProxy/0.0.25
request headers (8) 
{
  "accept-encoding": "gzip, deflate, br, zstd",
  "host": "ua-tracer.paulkinlan-ea.deno.net",
  "traceparent": "00-05d7282751218ea05cbe1619020958de-ebc982c70393ea7e-01",
  "tracestate": "",
  "user-agent": "MisskeyMediaProxy/0.0.25",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-05d7282751218ea05cbe1619020958de-7cd4bbcbc7e7130f-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-22 12:06:38.419 UTC +2036 ms Open Graph image GET MisskeyMediaProxy/0.0.25
request headers (6) 
{
  "accept-encoding": "gzip, deflate, br, zstd",
  "host": "ua-tracer.paulkinlan-ea.deno.net",
  "traceparent": "00-323c1c8e489a55be874f19dc16012be6-e4ebc87de7818248-01",
  "tracestate": "",
  "user-agent": "MisskeyMediaProxy/0.0.25",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}