ua-tracer
by Paul Kinlan
trace lyFoKTA0
what does a user agent actually fetch, follow & run?
Trace lyFoKTA0
First seen: 2026-10-30 00:29:30.921 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 |
|---|---|---|---|---|
| 2026-10-30 00:29:30.921 UTC | +0 ms | homepage | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
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,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-f359cd94560cd6088946616c1900befe-3f4ad2e096502440-01",
"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-f359cd94560cd6088946616c1900befe-4702fcf07c12b87e-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 00:29:35.673 UTC | +4752 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-a0f1d1f09d81750354444e2ab0c987bc-9561dcbba6027e69-01",
"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-a0f1d1f09d81750354444e2ab0c987bc-ff611f27c19876a4-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 00:29:35.675 UTC | +4754 ms | CSS | 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/",
"traceparent": "00-56a6c303a2ee9fd363cc81b0f917f4db-d92a89327220bdc3-01",
"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": "00-56a6c303a2ee9fd363cc81b0f917f4db-c58e07add9ec16d5-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 00:29:35.702 UTC | +4781 ms | preload (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": "00-039ed0bafb226aca90ad2867e2fafdb5-3b34b3cc99744a95-01",
"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": "00-039ed0bafb226aca90ad2867e2fafdb5-618ccd09f4acca26-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 00:29:35.703 UTC | +4782 ms | 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": "00-2ed52807f6c8c20ca4a38a6188ccbae2-92a412fa933ac95a-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"
}
|
||||
| 2026-10-30 00:29:35.739 UTC | +4818 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-bbbf8a594331ef2ffc2f5ad9c6f60d14-effa87b45d141d00-01",
"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-bbbf8a594331ef2ffc2f5ad9c6f60d14-027e57c6deb77cea-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 00:29:35.768 UTC | +4847 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": "00-3c1e0d20d5cc50d558828e012dc9a3c8-023f1dd57f8df43e-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": "00-3c1e0d20d5cc50d558828e012dc9a3c8-df1788cdb8853965-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 00:29:35.796 UTC | +4875 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": "00-55bf8fda1ae47cc3a263bf5d1c1cf217-5d87fc5c535623ac-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": "00-55bf8fda1ae47cc3a263bf5d1c1cf217-0860f044b1e7adc0-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 00:29:36.706 UTC | +5785 ms | font (HTML) | 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-aa65b687e64ea241e76cc46f877dce97-91e0495531204b1c-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-aa65b687e64ea241e76cc46f877dce97-a809bf6d6ccd99b5-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 00:29:37.620 UTC | +6699 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/lyFoKTA0/9IdnfGnT/style.css",
"traceparent": "00-1c20ff4cd16be4dbab7eb1040a49b1df-674dd8a01b7a5bf8-01",
"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": "00-1c20ff4cd16be4dbab7eb1040a49b1df-dec808cd54b788b2-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 00:29:39.158 UTC | +8237 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": "00-2757ddc21ad76bc6659d7c3403b2de2d-c467ce974585f361-01",
"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": "00-2757ddc21ad76bc6659d7c3403b2de2d-9a939b68a06e6c3e-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 00:29:39.207 UTC | +8286 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/lyFoKTA0/9IdnfGnT/style.css",
"traceparent": "00-088bcd9bdee3b0972cb74e70524a0ba3-1b1ea4405ae55758-01",
"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": "00-088bcd9bdee3b0972cb74e70524a0ba3-f4f8cd7c63b5cf1b-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 00:29:39.223 UTC | +8302 ms | JS executed beacon | 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": "00-2f9ffdef612a7c4477ff4f3f05e2c3db-611b89d3ea204efd-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": "00-2f9ffdef612a7c4477ff4f3f05e2c3db-95f10d0d8a136725-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 00:29:39.234 UTC | +8313 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/lyFoKTA0/9IdnfGnT/style.css",
"traceparent": "00-6bae36e6b6690486758e680718558269-48e3225293eefad6-01",
"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"
}
|
||||
| 2026-10-30 00:29:39.248 UTC | +8327 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": "00-0ca470671b9ed85a840272677c9498ef-1928bedd173454ae-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": "00-0ca470671b9ed85a840272677c9498ef-087dedfe0c70e8b6-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 00:29:39.375 UTC | +8454 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-b543c73083eadcd466d4b92b7bb137de-dcb52d529596400a-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-b543c73083eadcd466d4b92b7bb137de-5fe7bae8960a1c96-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-30 00:29:40.511 UTC | +9590 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/lyFoKTA0/9IdnfGnT/iframe",
"traceparent": "00-fe6f763a0bc7c969dda46ea577ba1744-9697c7f30a1745e6-01",
"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-fe6f763a0bc7c969dda46ea577ba1744-19ec05df1e7da8f7-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-11-01 14:27:17.175 UTC | +223066254 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-ca4240b57aa7fcbcf09b5db132684505-5d9f784d189120c6-01",
"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-ca4240b57aa7fcbcf09b5db132684505-2be02138b4390485-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-11-01 14:27:19.851 UTC | +223068930 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": "00-0356cd57cbbaef039c0b2766f6466d49-79aebf9151485bb1-01",
"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": "00-0356cd57cbbaef039c0b2766f6466d49-e537aa2b9bde01e9-01",
"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).