ua-tracer
by Paul Kinlan
trace 9XC5CpJS
what does a user agent actually fetch, follow & run?
Trace 9XC5CpJS
First seen: 2026-10-28 08:16:42.595 UTC
User-Agent: Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
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.
| Received | Δ | Kind | Method | User-Agent |
|---|---|---|---|---|
| 2026-10-28 08:16:42.595 UTC | +0 ms | homepage | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (10){
"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,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"host": "uatracer.com",
"traceparent": "00-4731783e27562e85350da41d66761c82-0dc05f39d049ffb1-01",
"tracestate": "",
"upgrade-insecure-requests": "1",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-10-28 08:16:48.251 UTC | +5656 ms | ES module | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (14){
"accept": "*/*",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "[redacted]",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-4767ae1264519455405a2109913eab2f-e5278ab4161c12ff-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-4767ae1264519455405a2109913eab2f-c8a21f1a1e48292b-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-28 08:16:48.287 UTC | +5692 ms | prefetch | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"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,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "[redacted]",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-d6cb5d359e05e44fcba7f21f3f350fb6-f26aee920f8b4e66-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-d6cb5d359e05e44fcba7f21f3f350fb6-46e07be72d5aaa43-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-28 08:16:48.302 UTC | +5707 ms | CSS | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (11){
"accept": "text/css,*/*;q=0.1",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "[redacted]",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-bd085b11766fbf68bd382aceafca7b0d-18fb311543ea28a2-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-10-28 08:16:48.320 UTC | +5725 ms | JS | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"accept": "*/*",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "[redacted]",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-bcc26b93de70aeaa4d7e80c5d37b9c42-fecd61c8352bedc7-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-bcc26b93de70aeaa4d7e80c5d37b9c42-13db72a9fde1bbb5-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-28 08:16:48.327 UTC | +5732 ms | image | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "[redacted]",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-f7f032ee7e226158fd37ce25850caf7c-c41ee5be0131f01d-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-f7f032ee7e226158fd37ce25850caf7c-672becb5c1fba30c-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-28 08:16:48.335 UTC | +5740 ms | iframe document | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (14){
"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,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "[redacted]",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-c1a1ce59b364ab290f20584aa1af4f09-8ed2dd20548ed23f-01",
"tracestate": "",
"upgrade-insecure-requests": "1",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-c1a1ce59b364ab290f20584aa1af4f09-8ccb8c593114a1b1-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-28 08:16:48.381 UTC | +5786 ms | preload (image) | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (11){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "[redacted]",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-4c7279eeab5828e3c61d8d7af847f533-b7217a306c0408a8-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-10-28 08:16:48.421 UTC | +5826 ms | font (HTML) | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (12){
"accept": "*/*",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "[redacted]",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-8fd53528a216ce961199d93fd4e4787c-5a394a63da5d7d38-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-10-28 08:16:50.540 UTC | +7945 ms | CSS @import (nested stylesheet) | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"accept": "text/css,*/*;q=0.1",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "[redacted]",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/9XC5CpJS/oK6JPDnF/style.css",
"traceparent": "00-449babbfe0d26d4a9bc94bf1627a0db7-04d5ea681b3949ae-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-449babbfe0d26d4a9bc94bf1627a0db7-72f30cf8958be2cb-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-28 08:16:51.603 UTC | +9008 ms | image inside iframe | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "[redacted]",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/9XC5CpJS/oK6JPDnF/iframe",
"traceparent": "00-bfbf6ea1c20406ec54b2b241ce2cd663-f7cb13194345478a-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-bfbf6ea1c20406ec54b2b241ce2cd663-d40b7ecd4c7503eb-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-28 08:16:52.343 UTC | +9748 ms | CSS @font-face | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (12){
"accept": "*/*",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "[redacted]",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/r/9XC5CpJS/oK6JPDnF/style.css",
"traceparent": "00-b8afe02cb6e6e92887f98fa77b8876a1-65c2910610e28049-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-10-28 08:16:52.379 UTC | +9784 ms | ES module executed | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "[redacted]",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-52a500378b197060fda441fb1038a595-4ba6ee66ea38b4f7-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-52a500378b197060fda441fb1038a595-54e92325bc2b4479-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-28 08:16:52.384 UTC | +9789 ms | CSS background-image | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "[redacted]",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/9XC5CpJS/oK6JPDnF/style.css",
"traceparent": "00-710b372d2d41b9a3a4054dd6f49c3593-53f070f57ef2eafd-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-710b372d2d41b9a3a4054dd6f49c3593-05f6c34fca94ea17-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-28 08:16:52.407 UTC | +9812 ms | JS executed beacon | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (11){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "[redacted]",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-b5029e1cc986781c788329e92340611d-878961ae16adbc27-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-10-28 08:16:52.458 UTC | +9863 ms | Reporting API report (POST) | POST | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (16){
"accept": "*/*",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"content-length": "0",
"content-type": "application/json",
"cookie": "[redacted]",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-311a557b369bdb296b84f9dedcf3a78d-4a46baabf853fbf7-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-311a557b369bdb296b84f9dedcf3a78d-2b038f76dbcf7e16-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-28 08:16:53.951 UTC | +11356 ms | CSP violation report (POST) | POST | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (16){
"accept": "*/*",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"content-length": "0",
"content-type": "application/json",
"cookie": "[redacted]",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-ba915902b930d233cb3f62f56d4adc91-52b4b175c62e62ec-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-ba915902b930d233cb3f62f56d4adc91-3fd6a82dd6dd8614-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 06:21:32.275 UTC | +165889680 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){
"accept-encoding": "gzip,deflate",
"connection": "close",
"host": "uatracer.com",
"traceparent": "00-42c005c78c6233fd6ca36c0ddb7671a7-91438e72e7e5f8af-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": "00-42c005c78c6233fd6ca36c0ddb7671a7-5c46d55dc69f1c4b-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 06:21:36.183 UTC | +165893588 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-f1d16482eb07b359104dcbbdab260af6-7ee33f40f53647c5-01",
"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-f1d16482eb07b359104dcbbdab260af6-c0ed86b9d981456e-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-11-04 03:59:21.226 UTC | +589358631 ms | iframe document | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Reflectionbot/1.0; +https://reflection.ai/bot) Chrome/151.0.0.0 Safari/537.36 |
request headers (15){
"accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8",
"accept-encoding": "gzip,deflate,br",
"accept-language": "en-US,en;q=0.9",
"host": "uatracer.com",
"sec-fetch-dest": "document",
"sec-fetch-mode": "navigate",
"sec-fetch-site": "none",
"sec-fetch-user": "?1",
"traceparent": "00-27099cd8664fe21fbede1d182fb0d470-f0569a737f5670b6-01",
"tracestate": "",
"upgrade-insecure-requests": "1",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Reflectionbot/1.0; +https://reflection.ai/bot) Chrome/151.0.0.0 Safari/537.36",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-27099cd8664fe21fbede1d182fb0d470-7df509af6e38fe99-01",
"x-deno-userspace-tracestate": ""
}
|
||||
Client-side resource waterfall
JS executed (beacon hit) but no resource-timing payload was posted (UA may block sendBeacon/fetch or strip the body).