ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace l88faDPE

First seen: 2026-07-03 05:18:16.369 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 05:18:16.369 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-c7b9de8efa1b4e83904a01eefe79d36d-26f5cd5b9f18f9ec-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-c7b9de8efa1b4e83904a01eefe79d36d-790f000482b0226b-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-03 05:18:18.861 UTC +2492 ms Open Graph image GET Mozilla/5.0 (compatible; Discordbot/2.0; +https://discordapp.com)
request headers (7) 
{
  "host": "uatracer.com",
  "traceparent": "00-da95ceb7fac58b5f1715dd3b6952fa4c-4fc7d8a81345412a-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-da95ceb7fac58b5f1715dd3b6952fa4c-ea890513dd892a6a-01",
  "x-deno-userspace-tracestate": ""
}