ua-tracer by Paul Kinlan

trace FCC58eYc

ua-tracer

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

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Trace FCC58eYc

First seen: 2026-11-02 20:09:31.303 UTC
User-Agent: RiverBot/1.0 (+https://river.ai/bot)
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
2026-11-02 20:09:31.303 UTC +0 ms homepage GET RiverBot/1.0 (+https://river.ai/bot)
request headers (13) 
{
  "accept": "*/*",
  "accept-encoding": "gzip",
  "from": "bot@river.ai",
  "host": "uatracer.com",
  "signature": "sig1=:u5F+1mDKxkKAZaYVNYtoP+vE5tXuZwHgnOl17+BznxwC6r1Q5myi8WoiwwcCxo5Bxrw0fWPvB/qw05f9y4vdAA==:",
  "signature-agent": "\"https://river.ai\"",
  "signature-input": "sig1=(\"@authority\" \"signature-agent\");created=1793650171;expires=1793650231;keyid=\"pWuM_zskP4S6UuG3D5vyaawuhZjxIV1sZS6WgfOtP6k\";alg=\"ed25519\";nonce=\"ftB7L0UGh9gc8qriGZnuLA==\";tag=\"web-bot-auth\"",
  "traceparent": "00-ac922d441811485c4e6a51f297f6c132-1083f0fe7e62b1a8-01",
  "tracestate": "",
  "user-agent": "RiverBot/1.0 (+https://river.ai/bot)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-ac922d441811485c4e6a51f297f6c132-505d100772fba1df-01",
  "x-deno-userspace-tracestate": ""
}