ua-tracer
by Paul Kinlan
trace 1IPFdVxb
what does a user agent actually fetch, follow & run?
Trace 1IPFdVxb
First seen: 2026-08-23 14:02:37.376 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 |
|---|---|---|---|---|
| 2026-08-23 14:02:37.376 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=:MZZ5r3tK/WdVuwVnnAOejAwzmMeMRqJw6EpdWDaHl7mfAljBFBH4qRR+XiQrKTDUVhcbPL8Qfuon7c/VG5t7Dw==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1787493757;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1787493817;nonce=\"_HsFmCTRAWp_tkDoZOotq1BIxnOMKvkrHNjKR9bZN-1nt3NEcKpxfhOxpos8zO4boqm3NaZ-xtdzkBFLAd-kCA\";tag=\"web-bot-auth\"",
"traceparent": "00-3b340eb593f26b904136690a9313d2e8-af770011997b9060-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-3b340eb593f26b904136690a9313d2e8-3249f6d1477af03f-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-08-23 14:03:18.134 UTC | +40758 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=:/vPgF9nTTyIwgmirNARoMGaI7wWyJxJXMSOgHK5nkpPIzprNuUQ6pOtSFCRhg4+m/eFieNLnFWEVw+YPqtptDQ==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1787493797;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1787493857;nonce=\"d6C3YITXj4A0_qQUjmgIRatYnl4m4tu4XxQf0xyoJnCx3y_tk9tLys8dPoNH1s82g7Eg5TCDpxuQF8_oXCO6_g\";tag=\"web-bot-auth\"",
"traceparent": "00-792a1d2caca39abe85780818f9299239-cd1dbf53d1e500cd-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-08-23 14:03:19.418 UTC | +42042 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=:Rd/kRHg2O+X0GOKOTSjCrSdu31u6b9eah+p8LfkDXD4L1mihINRgbfobAxQHbYoNOPS7bg7nApP4LSihSSHaBA==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1787493799;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1787493859;nonce=\"_fYvjFYkPDx9HPAk4HDvsQ1MDJvg485hM9gJS5ioJdBn4_ZbJcqqpWkPntdbRsgheWk9FkqQE8p3wU4HZq5MQg\";tag=\"web-bot-auth\"",
"traceparent": "00-5d62a7f6559fcd49ef10d8cb91c556a5-4ed5eb4b3ae3b0d4-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-08-23 14:03:20.705 UTC | +43329 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=:h08V9rMMnJkxZQs35mNdUoy5R6FxL5rKCY5/0hroxckghT7GEgGPuJkdCxCmVgX8YTtYzCJNz7eSxw6aB1XBBA==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1787493800;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1787493860;nonce=\"FTe_vmGrGCGcChEMIdcSmGxme3CJPc--FR6BDslYT2S1TgF9TByoGj5-Yv-jHV8VEJBGitwhYfXk1jy3tR-MUg\";tag=\"web-bot-auth\"",
"traceparent": "00-7ae6b94a25d8746bcd79da5856616c70-d5888e0f06a39c07-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-7ae6b94a25d8746bcd79da5856616c70-d07cdf852b313462-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-08-23 14:03:21.933 UTC | +44557 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=:czqXDJvmjE/zs73PPV76hPkFzqB3hKG8HwIPEJDrAlZnHVX6j5P7ucRJ7MaYZZqYawDRtMQFZk8MVnzijA8ODA==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1787493801;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1787493861;nonce=\"HCqbv_A3Vxqwlo4nvj_bb8fklfSD1ctvJykY66SFSLznm30fvblh6PTWTQ2BMshJrDszkeOjmgo2rYiz72ZFfw\";tag=\"web-bot-auth\"",
"traceparent": "00-c678352d2f65fc5672813a774998f21a-b20eae5e7d1fb726-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-c678352d2f65fc5672813a774998f21a-6e1e6252d3c8f55f-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-08-23 14:03:23.181 UTC | +45805 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=:Gam1ZrdlrlcmKOzGnC8VQfd5upg/7hN5pEoiTmVVs68X9Km/JMbcUAPj2G7Kfer4h4FDmfx26Cwmu2VOfqerAg==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1787493803;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1787493863;nonce=\"PaNmSAz-h2FDAs-0yyiw_lMlf5nx6JeLOTDopZ1KU-nj54-1TTrUqioFJ1hF8GhVKaIEX57HQla5tSoV0vWWLg\";tag=\"web-bot-auth\"",
"traceparent": "00-48e0c0fe31099010b3fa73466aeba84b-7dc9f0b5ee6f6de6-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-48e0c0fe31099010b3fa73466aeba84b-b1fcec858e130438-01",
"x-deno-userspace-tracestate": ""
}
|
||||