ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace 4ij750VT

First seen: 2026-06-23 08:07:58.234 UTC
User-Agent: Mozilla/5.0 (compatible; xAI-SearchBot/1.0; +https://x.ai)

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
2026-06-23 08:07:58.234 UTC +0 ms homepage GET Mozilla/5.0 (compatible; xAI-SearchBot/1.0; +https://x.ai)
request headers (6) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-4f8ed929beda66320c419e16d13853d9-ed7928efc826e5eb-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; xAI-SearchBot/1.0; +https://x.ai)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-06-23 08:07:59.029 UTC +795 ms JS GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ChatGPT-User/1.0; +https://openai.com/bot)
request headers (6) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-5618e72e07543d22923d971ba3da535f-e63bbf52f6850b7a-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ChatGPT-User/1.0; +https://openai.com/bot)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-06-23 08:07:59.038 UTC +804 ms ES module GET Mozilla/5.0 (compatible; xAI-SearchBot/1.0; +https://x.ai)
request headers (6) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-19704289f1b9e60761f39d97dd514238-37e3eaa0cb16ee61-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; xAI-SearchBot/1.0; +https://x.ai)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-06-23 08:07:59.923 UTC +1689 ms web app manifest GET Mozilla/5.0 (compatible; OAI-SearchBot/1.3; +https://openai.com/searchbot)
request headers (6) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-0d4bd20333cec877616a2a705262fb37-6cfd81c988dd3057-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; OAI-SearchBot/1.3; +https://openai.com/searchbot)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}