ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace CvtCXYd1

First seen: 2026-07-03 04:09:49.309 UTC
User-Agent: Mozilla/5.0 (compatible; Discordbot/2.0; +https://discordapp.com)
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
2026-07-03 04:09:49.309 UTC +0 ms homepage GET Mozilla/5.0 (compatible; Discordbot/2.0; +https://discordapp.com)
request headers (8) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
  "host": "uatracer.com",
  "traceparent": "00-ef2212dc3c8c4a96690ff92d9c6e88cf-159cdc3d8e2db334-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; Discordbot/2.0; +https://discordapp.com)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-ef2212dc3c8c4a96690ff92d9c6e88cf-e74c55d1760767b0-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-03 04:09:51.638 UTC +2329 ms Twitter card image GET Mozilla/5.0 (compatible; Discordbot/2.0; +https://discordapp.com)
request headers (7) 
{
  "host": "uatracer.com",
  "traceparent": "00-e3e9dcdc809b69240c603e3b7c204888-07c82b4cd9d83cc8-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; Discordbot/2.0; +https://discordapp.com)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-e3e9dcdc809b69240c603e3b7c204888-e39f4ff3c0c4ad3c-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-03 04:20:57.705 UTC +668396 ms Twitter card image GET Mozilla/5.0 (compatible; Discordbot/2.0; +https://discordapp.com)
request headers (5) 
{
  "host": "uatracer.com",
  "traceparent": "00-aecd581466ffa3afbe876eece981d5a4-c06b95d1c1a0d677-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; Discordbot/2.0; +https://discordapp.com)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}