ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace CI5T4PLK

First seen: 2026-07-03 04:36:01.809 UTC
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Edge/125.0.2535.67 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
2026-07-03 04:36:01.809 UTC +0 ms homepage GET Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Edge/125.0.2535.67 Safari/537.36
request headers (9) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
  "accept-encoding": "gzip",
  "accept-language": "en-us,en;q=0.5",
  "connection": "close",
  "host": "uatracer.com",
  "traceparent": "00-dd966fd067994892b34638f20dcbc0f1-3429fb3e60d5a4a9-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Edge/125.0.2535.67 Safari/537.36",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-07-03 04:39:15.578 UTC +193769 ms Open Graph image GET cfp/dev
request headers (6) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-f42cd2f88f03b04d6a2d4651513f974e-d3228bee5c809c57-01",
  "tracestate": "",
  "user-agent": "cfp/dev",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}
2026-07-03 04:39:37.064 UTC +215255 ms Open Graph image GET Python/3.11 aiohttp/3.13.3
request headers (9) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br",
  "host": "uatracer.com",
  "traceparent": "00-4224910825241e9da0d78ff33059a396-3e5fbbbd99e82ad6-01",
  "tracestate": "",
  "user-agent": "Python/3.11 aiohttp/3.13.3",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-4224910825241e9da0d78ff33059a396-69aaad154715aa85-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-03 04:39:38.339 UTC +216530 ms Open Graph image GET Python/3.11 aiohttp/3.13.3
request headers (9) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br",
  "host": "uatracer.com",
  "traceparent": "00-c5809f127af897ca59e4b4abccc95c24-59b680419fcf23c8-01",
  "tracestate": "",
  "user-agent": "Python/3.11 aiohttp/3.13.3",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-c5809f127af897ca59e4b4abccc95c24-9496455a69c40cc2-01",
  "x-deno-userspace-tracestate": ""
}