ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace lYYp6q8s

First seen: 2026-07-03 04:17:22.597 UTC
User-Agent: Readybot.io (https://readybot.io/webmasters)
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 04:17:22.597 UTC +0 ms homepage GET Readybot.io (https://readybot.io/webmasters)
request headers (10) 
{
  "accept-encoding": "gzip",
  "baggage": "sentry-environment=production,sentry-public_key=09ca690f5b41ac2d0246d8fff537fc1f,sentry-sample_rand=0.0822905241359886,sentry-sample_rate=0.01,sentry-sampled=false,sentry-trace_id=14c55d7b26fe9212e74867013b2636a1",
  "host": "uatracer.com",
  "sentry-trace": "14c55d7b26fe9212e74867013b2636a1-3188bbe8380b4bc3-0",
  "traceparent": "00-cb39ce04b7b123e8147021e973776515-b91370b9b95329b7-01",
  "tracestate": "",
  "user-agent": "Readybot.io (https://readybot.io/webmasters)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-cb39ce04b7b123e8147021e973776515-6a4422592050b3b4-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-03 04:17:31.618 UTC +9021 ms Open Graph image 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": "00-17c5f7e45b770bdf49eb0bbb071e9061-f6424d60d1be05de-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": "00-17c5f7e45b770bdf49eb0bbb071e9061-ff80c56530c62a83-01",
  "x-deno-userspace-tracestate": ""
}