ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace EicKn3zN

First seen: 2026-07-02 18:55:11.130 UTC
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Bluesky Cardyb/1.1; +mailto:support@bsky.app) Chrome/W.X.Y.Z Safari/537.36
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
2026-07-02 18:55:11.130 UTC +0 ms homepage GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Bluesky Cardyb/1.1; +mailto:support@bsky.app) Chrome/W.X.Y.Z Safari/537.36
request headers (8) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-7ac0d722dc593eef76bc41482fc41a43-6dd6b9ec351f515e-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Bluesky Cardyb/1.1; +mailto:support@bsky.app) Chrome/W.X.Y.Z Safari/537.36",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-7ac0d722dc593eef76bc41482fc41a43-a3845976d93bf9e8-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-02 18:55:12.131 UTC +1001 ms Open Graph image GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Bluesky Cardyb/1.1; +mailto:support@bsky.app) Chrome/W.X.Y.Z Safari/537.36
request headers (8) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-ecfd074916a03ab2914e1b5972a2cdaf-74b5f63f61aa2be8-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Bluesky Cardyb/1.1; +mailto:support@bsky.app) Chrome/W.X.Y.Z Safari/537.36",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-ecfd074916a03ab2914e1b5972a2cdaf-bb9527a1af3e47db-01",
  "x-deno-userspace-tracestate": ""
}