ua-tracer
by Paul Kinlan
trace MM76lapT
what does a user agent actually fetch, follow & run?
Trace MM76lapT
First seen: 2026-09-15 09:44:42.283 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 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.
| Received | Δ | Kind | Method | User-Agent |
|---|---|---|---|---|
| 2026-09-15 09:44:42.283 UTC | +0 ms | homepage | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot) |
request headers (9){
"accept": "*/*",
"accept-encoding": "gzip, br, deflate",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"traceparent": "00-cc7a44ae4e1c10cec27acd228e53d13b-49f71bd158836686-01",
"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"
}
|
||||
| 2026-09-15 09:44:53.471 UTC | +11188 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": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-cba4673895e50112b294ca6112088354-3d63d2f63070ad84-01",
"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"
}
|
||||
| 2026-09-15 09:44:54.047 UTC | +11764 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": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-8d30665f23e71a5b51a69ecd12d5f7f9-fe89b9850fddc8df-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"
}
|
||||
| 2026-09-15 09:44:54.559 UTC | +12276 ms | 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": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-42614c1d77f52c61f27e2553e87d6dfd-79bcb346f34f4fe7-01",
"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"
}
|
||||
| 2026-09-15 09:44:56.561 UTC | +14278 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": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-5e5ecc08a285bbbf6b22980c8d08d870-53d0ae52a90efaca-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"
}
|
||||
| 2026-09-15 09:44:57.060 UTC | +14777 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": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-03b94b3ab4691197d6baa34260329f7d-039bb78997cf539e-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"
}
|
||||
| 2026-09-15 09:44:58.087 UTC | +15804 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": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-a0cf8ee18c16f79682add931eae1a4d6-b7ed9b53b9d89774-01",
"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"
}
|
||||
| 2026-09-15 09:44:59.039 UTC | +16756 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": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-4cc65b9a4290ebf8c8d585ab6d680b66-f929212d6b9f8207-01",
"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"
}
|
||||
| 2026-09-15 09:44:59.619 UTC | +17336 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": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-b90ad5e5a90e3f4458a76f35a9c63e08-56b837cb2325ba69-01",
"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"
}
|
||||
| 2026-09-15 09:45:04.531 UTC | +22248 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": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-67de8d6e360e1aa8622f7f89492f7dd6-c8c3d0867fd892de-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"
}
|
||||
| 2026-09-15 09:45:05.534 UTC | +23251 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": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-0de24bdf954e8e36771bc07872a4a6c4-bf67893bd5be32aa-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"
}
|
||||
| 2026-09-15 09:45:10.042 UTC | +27759 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": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/MM76lapT/7Jx2CbFx/iframe",
"traceparent": "00-766b6c8767a3e871090597e7686ffaa7-decda9da001d65a3-01",
"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"
}
|
||||
| 2026-09-15 09:45:25.534 UTC | +43251 ms | CSS | 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": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-f1804527374ba1964d94a28c19d202df-7b646acdc8e59a23-01",
"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"
}
|
||||
| 2026-09-15 09:45:29.529 UTC | +47246 ms | CSS background-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": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/MM76lapT/7Jx2CbFx/style.css",
"traceparent": "00-4c91048dbe43135201957d9d3ee71d8b-e644cf873cb1d8e8-01",
"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"
}
|
||||
| 2026-09-15 09:45:30.029 UTC | +47746 ms | CSS @font-face | 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": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/MM76lapT/7Jx2CbFx/style.css",
"traceparent": "00-3eac491f350ea71c9271401a67d5f850-c26e639bf3e46c4c-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"
}
|
||||
| 2026-09-15 09:45:30.531 UTC | +48248 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 (11){
"accept": "*/*",
"accept-encoding": "gzip, br, deflate",
"cookie": "[redacted]",
"from": "gptbot(at)openai.com",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/MM76lapT/7Jx2CbFx/style.css",
"traceparent": "00-c3b7bc62d17886f2caa6da8e8672bcc6-545b86c03a4a4eaa-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"
}
|
||||
| 2026-09-17 09:28:12.980 UTC | +171810697 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 (7){
"accept-encoding": "gzip,deflate",
"connection": "close",
"host": "uatracer.com",
"traceparent": "00-d1931deabf84be4823b3cb4e3c5a7218-3ce52d0e4e557a7d-01",
"tracestate": "",
"user-agent": "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",
"via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-09-17 09:28:14.286 UTC | +171812003 ms | image inside iframe | 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){
"accept-encoding": "gzip,deflate",
"connection": "close",
"host": "uatracer.com",
"traceparent": "00-4a2f3e263cb5bbd1468cd46f04e41ddb-27d62b8c6f4baa40-01",
"tracestate": "",
"user-agent": "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",
"via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-4a2f3e263cb5bbd1468cd46f04e41ddb-610859f7d2c40ef0-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-09-29 18:36:54.326 UTC | +1241532043 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){
"accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
"accept-encoding": "gzip",
"accept-language": "zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7",
"cache-control": "no-cache",
"connection": "keep-alive, close",
"host": "uatracer.com",
"pragma": "no-cache",
"traceparent": "00-b39bca91ba108ca2fbac2aec7d709441-f9a81c523b7ddbcb-01",
"tracestate": "",
"upgrade-insecure-requests": "1",
"user-agent": "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",
"via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}
|
||||