ua-tracer by Paul Kinlan

trace UzcOR1gF

ua-tracer

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

← all traces

Trace UzcOR1gF

First seen: 2026-07-26 19:29:54.193 UTC
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
Bot verification: ✓ verified GPTBot IP checked against published bot CIDR ranges; IP in GPTBot published range.

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
2026-07-26 19:29:54.193 UTC +0 ms homepage GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
  "referer": "https://webweekly.email",
  "traceparent": "00-d786f5c2f55403a103890505eb5a6892-35c2c0a95cc775b4-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-openai-host-hash": "383938406"
}
2026-07-26 19:31:07.999 UTC +73806 ms apple-touch-icon GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "cookie": "ua-tracer-trace=UzcOR1gF",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-3c8c8a6c48618af382c9f5387d45f594-325c46448880196e-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-openai-host-hash": "383938406"
}
2026-07-26 19:31:20.985 UTC +86792 ms ES module GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "cookie": "ua-tracer-trace=UzcOR1gF",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-ab8fa2abade0a8d9cf952a4c9e342dc2-59fb6c608ce427c6-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-openai-host-hash": "383938406"
}
2026-07-26 19:31:25.707 UTC +91514 ms font (HTML) GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "cookie": "ua-tracer-trace=UzcOR1gF",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-7ec741eecbcf23291f9572ba918fc04f-9f98962e82f7c2ba-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-openai-host-hash": "383938406"
}
2026-07-26 19:31:26.339 UTC +92146 ms web app manifest GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "cookie": "ua-tracer-trace=UzcOR1gF",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-d4a52f5fe6d343d60a4303f19d3e1511-aefbabad16f958b2-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-openai-host-hash": "383938406"
}
2026-07-26 19:31:26.793 UTC +92600 ms preload (image) GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "cookie": "ua-tracer-trace=UzcOR1gF",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-1dcb9e6199f8bca3e8933de3ea7cf21b-fd88b8ea2a6cb3a6-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-openai-host-hash": "383938406"
}
2026-07-26 19:31:27.295 UTC +93102 ms favicon GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "cookie": "ua-tracer-trace=UzcOR1gF",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-005d3589da6040e5e50f549eddc4719a-8980d783aabc8966-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-openai-host-hash": "383938406"
}
2026-07-26 19:31:34.219 UTC +100026 ms prefetch GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "cookie": "ua-tracer-trace=UzcOR1gF",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-fbe89b6f449bd731f55a2d18864e9dda-629e570151f1161f-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-openai-host-hash": "383938406"
}
2026-07-26 19:31:41.180 UTC +106987 ms JS GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "cookie": "ua-tracer-trace=UzcOR1gF",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-3aaac9bdb6d7eb59864576bdcb81ebed-d3e55af9a558dc07-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-openai-host-hash": "383938406"
}
2026-07-26 19:31:41.639 UTC +107446 ms iframe document GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "cookie": "ua-tracer-trace=UzcOR1gF",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-c2f264d3c1124815137c7e483e522dc2-d4954e0bdf56a164-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-openai-host-hash": "383938406"
}
2026-07-26 19:31:43.385 UTC +109192 ms image inside iframe GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "cookie": "ua-tracer-trace=UzcOR1gF",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/r/UzcOR1gF/ER8uOZHU/iframe",
  "traceparent": "00-1b4b76f7f3c0019c472f5037cbe12bcc-1e169952de74c1ce-01",
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  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-openai-host-hash": "383938406"
}
2026-07-26 19:32:00.932 UTC +126739 ms image inside iframe GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "cookie": "ua-tracer-trace=UzcOR1gF",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/r/UzcOR1gF/ER8uOZHU/iframe",
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  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-openai-host-hash": "383938406"
}
2026-07-26 19:38:21.755 UTC +507562 ms image GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
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  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-openai-host-hash": "383938406"
}
2026-07-26 19:38:23.535 UTC +509342 ms CSS GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
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  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)",
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  "x-openai-host-hash": "383938406"
}
2026-07-26 19:38:24.583 UTC +510390 ms CSS @import (nested stylesheet) GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
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  "x-openai-host-hash": "383938406"
}
2026-07-26 19:38:25.118 UTC +510925 ms CSS background-image GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
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  "x-openai-host-hash": "383938406"
}
2026-07-26 19:38:25.631 UTC +511438 ms CSS @font-face GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "from": "gptbot(at)openai.com",
  "host": "uatracer.com",
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  "x-openai-host-hash": "383938406"
}
2026-07-28 13:56:20.089 UTC +152785896 ms iframe document GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Amazonbot/0.1; +https://developer.amazon.com/support/amazonbot) Chrome/119.0.6045.214 Safari/537.36
request headers (9) 
{
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2026-07-31 21:32:05.105 UTC +439330912 ms iframe document GET Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1
request headers (12) 
{
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2026-08-10 10:34:52.038 UTC +1263897845 ms iframe document GET Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1
request headers (14) 
{
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2026-08-21 08:10:09.648 UTC +2205615455 ms iframe document GET Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)
request headers (8) 
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}
2026-08-21 08:10:14.532 UTC +2205620339 ms image inside iframe GET Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (12) 
{
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}
2026-08-25 18:57:30.000 UTC +2590055807 ms iframe document GET Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1
request headers (12) 
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