ua-tracer
by Paul Kinlan
trace H5bBOybO
what does a user agent actually fetch, follow & run?
Trace H5bBOybO
First seen: 2026-08-17 14:20:36.162 UTC
User-Agent: Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
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 |
|---|---|---|---|---|
| 2026-08-17 14:20:36.162 UTC | +0 ms | homepage | GET | Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/) |
request headers (12){
"accept": "*/*",
"accept-encoding": "deflate, gzip, br, zstd",
"host": "uatracer.com",
"signature": "sig=:SOEcJWnRR/lQjulpiDlMCKvNbp4lWcGkOTc1p7E2quoRflhctDkjpPVAC2lD181fAOmE4yYBQ+00IjG/sr0tBA==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786976436;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786976496;nonce=\"j3n2RZVXCAG4J-h0TG1UG932x2O-D9qZWeFqKWRJ4ZMdp2m2Kx5qs_JQHwl5HYrQ6rMlEs7Vgyg_MGTC8zNXew\";tag=\"web-bot-auth\"",
"traceparent": "00-bec935175c88e3917b23f57a2257bc9d-65ce26cf65cb77d5-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-bec935175c88e3917b23f57a2257bc9d-9feeb8e37052fcb4-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-08-17 14:22:03.029 UTC | +86867 ms | ES module | GET | Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/) |
request headers (10){
"accept": "*/*",
"accept-encoding": "deflate, gzip, br, zstd",
"host": "uatracer.com",
"signature": "sig=:e+wzdwRIKBmPRsUwBaKZqxkKZ+Y6plLWSn7iI2adsqW5wHf5LUuScIOhEZU7sxQ90Jjr75yM63LuABqFOqISDA==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786976522;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786976582;nonce=\"j7GS08rOWyky1ECwhCJw3UASvu3U1jSBCIEM8DaXj8HuBXnC5uu27Dq7fXpGn8INEcWt8RjY1emdlP0fB6v-eA\";tag=\"web-bot-auth\"",
"traceparent": "00-e72183bc505bbfdb11f4aea1abfa2349-37b58039397d0f91-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-08-17 14:22:05.191 UTC | +89029 ms | CSS | GET | Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/) |
request headers (10){
"accept": "*/*",
"accept-encoding": "deflate, gzip, br, zstd",
"host": "uatracer.com",
"signature": "sig=:01HFkyodIXox7Vga+UTbwJh5+nDKfQdESB9HMYyML1owarpzTZmcahhjgbSLtRC3BVHSE8SdvFr4f3IToaXIAg==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786976525;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786976585;nonce=\"wwI88ZSJ4DQXsY0Io3UF8EACokP0RQQmfb8Vyu9BWDd7KzYo8N2FUaZNLghELe1q2AluGNMeDlsJD9AlHrPYOg\";tag=\"web-bot-auth\"",
"traceparent": "00-300c7768b9f2b279de6e9421c79c5367-5cb0724b554666aa-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-08-17 14:22:06.520 UTC | +90358 ms | JS | GET | Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/) |
request headers (12){
"accept": "*/*",
"accept-encoding": "deflate, gzip, br, zstd",
"host": "uatracer.com",
"signature": "sig=:AHgtYeGAfIFHW6A5y/T/ewOt4wJRYd89sZrG+xhHk86kJ7njpK6x1HsJW1eSHwH59oe5LiGRla/xXZ3pYatWBQ==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786976526;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786976586;nonce=\"_hyDgLHCydefVVFtYct6gufHB6wP3wSuSH2aV1RaNT_M3q4azDv9EZhRk2Gj4tK3J1mcPYsJldmMsu-3hNGSTA\";tag=\"web-bot-auth\"",
"traceparent": "00-fa5a38c4ee23ff5e58ab7a571ad6e41b-79d890c70ffad479-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-fa5a38c4ee23ff5e58ab7a571ad6e41b-9dcbee3a280d05cc-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-08-17 14:22:08.138 UTC | +91976 ms | Open Graph image | GET | Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/) |
request headers (12){
"accept": "*/*",
"accept-encoding": "deflate, gzip, br, zstd",
"host": "uatracer.com",
"signature": "sig=:oES0A6lXGVvZAqh7hvQSt66s9ss6/TWjLN4UYRYVkJOmte5q/LxeKTwPWJ709w3GnSUb9Jti0iZQ2uKmUSflAw==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786976528;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786976588;nonce=\"Apwm_ib2o1nqHjwQYgp16cUE-MNxUdO6TYIiSXlr4FsgBeWTQAMxXIBK-hNe78CAUzE5L2k-pMbc-pqblpyjKQ\";tag=\"web-bot-auth\"",
"traceparent": "00-45872d012483ec9cd261c5a425810050-08fff5e8774ee44c-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-45872d012483ec9cd261c5a425810050-a2aac4e121df66d3-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-08-17 14:22:09.339 UTC | +93177 ms | image | GET | Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/) |
request headers (12){
"accept": "*/*",
"accept-encoding": "deflate, gzip, br, zstd",
"host": "uatracer.com",
"signature": "sig=:kQ2avTqrv6HwdUBidZUfKuzBuxa/L7aNYxvB+5QWZZQcDus1osdLasmEla3Oj+Pl7iYCxGXZ1iLXHKT0k0VlDw==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786976529;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786976589;nonce=\"v1hxjDhlaWnuRzVH07eP203QNnjPGZ5apDRgOfmes694cVTn8MqBcRGY4uq0DRKHLVFoiHkUsj0IOvlKwZQIRQ\";tag=\"web-bot-auth\"",
"traceparent": "00-35a5883490e65ccc001c95a4d07f4944-1305c91dbfbef795-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-35a5883490e65ccc001c95a4d07f4944-ca8c36200dc6104d-01",
"x-deno-userspace-tracestate": ""
}
|
||||