ua-tracer
by Paul Kinlan
trace d8fCIS90
what does a user agent actually fetch, follow & run?
Trace d8fCIS90
First seen: 2026-09-28 15:42:33.476 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 |
|---|---|---|---|---|
| 2026-09-28 15:42:33.476 UTC | +0 ms | homepage | 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=:SEdVtdbDNdKvaEcLkkt4Tcm5mcYgZkOkkqhYgBOqvR0NT19vPrXXPy1vtxTBdHoNATHUK+vOcYiKalSUAUG6Bw==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1790610153;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1790610213;nonce=\"sxu0IV3kgLCCRB9Bw11vgRg1NbhJaidCu3uAFyMCIKGzayXXXqndcHTi-yr_6g4Ck-bfhQkJOhZjoyX4xjjalQ\";tag=\"web-bot-auth\"",
"traceparent": "00-d84b6fbd4acb24037029f9ee7f553772-5ea6c55aaf3efe60-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-09-28 15:44:52.638 UTC | +139162 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=:TQqc+OP304gaMvROk0OHPhp6taG0d4tEtpTtmkASIYAhj0JkywKcg0s39EVcNHdXOGHHtRpsW6NzqzDF+oekDg==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1790610292;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1790610352;nonce=\"A7yY7N3g6KzTxVIA07UZTzoE-I_71s5NXC8DK__wgrW0mrum1oXMf7eCMl9imw5tsSQeJ89WaEWp3Q7_9j9SNw\";tag=\"web-bot-auth\"",
"traceparent": "00-91aeffa332261826a364643a1c04a408-9e4d967a01e2b428-01",
"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": "00-91aeffa332261826a364643a1c04a408-9b02350fcecee6aa-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-09-28 15:44:53.450 UTC | +139974 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=:5yXQye721BdhdWv+v3Kk39A4djzlMSkn4VeskdP2t4T7X91enk81tdYKMBhglx2AgiLamfOctarxAFAJCr4bAg==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1790610293;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1790610353;nonce=\"v1SD9M0VvFkYZ6o6NMrK6_MQ-PvQQcUP67S7QSKGkGo3EeTfNTAPG90mX86pCQc1AAlsFyxRTbo3pfrFOuno_w\";tag=\"web-bot-auth\"",
"traceparent": "00-2a901a9af2845a1d42a3dec127f792dd-e5f2f40d4bb8da14-01",
"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": "00-2a901a9af2845a1d42a3dec127f792dd-c16171d6cf4df6e7-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-09-28 15:44:54.248 UTC | +140772 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=:jnk89OwIWRCZ4ZlbGPQCp0Xz3nFfcGFgJ/qADSnddexGXkenUntIR/YzEIIeMnkHYoXFpDR3yDHjaPZ+yacIDw==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1790610294;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1790610354;nonce=\"s79n2BGJBUI2higsh-G2iV4U9zwXijtlFiSBXVcXFci7fusKxokKm8MWHHd-TL5XVb68rtgxqiHkWz5B7mp8Jw\";tag=\"web-bot-auth\"",
"traceparent": "00-bbece0091711fcff52a3c51e9fdafe81-304c1032c36376e2-01",
"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-bbece0091711fcff52a3c51e9fdafe81-d196a035890a2594-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-09-28 15:44:55.314 UTC | +141838 ms | CSS | 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=:uT/hJM2Q7ilpJ7UKL0kRHeGfNl4ahbnMc/7J1NlmPk7fDMyEVaUyYYR5pWNkV6zJFh378nHnS4qJAas6tSImCw==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1790610295;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1790610355;nonce=\"7cZAKwbM3I0BevAMVyzFYq0SZzGIexRwD0vkCjSjMXJwxIfG1-27D2jL2ugeIOQMnaskw-4NO8BulaQKc0dBtQ\";tag=\"web-bot-auth\"",
"traceparent": "00-117ebcb54d51d890d3c3c772942a21ce-84a00dbff6e6ed2c-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": "00-117ebcb54d51d890d3c3c772942a21ce-eddb3f5aaeb88825-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-09-28 15:44:56.343 UTC | +142867 ms | ES module | 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=:X/S118RaNeWHIwj6z9rkXdznIKOq4axlb32f4FsxkU2gI4P/xfNFBtGhEclHNnJe3UpWXoRmEYTiJmFyOr+8BA==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1790610296;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1790610356;nonce=\"7OTayU1Dh-mLpiDvDAawhukDqSxkqw5TYpDq-cVKMpfr9URHRoC1CnEFhBrbGHMzJL8aRbmsa6oGra6bJ-hMVw\";tag=\"web-bot-auth\"",
"traceparent": "00-6bf2217574bc03de2bd9c6388deea1c3-b3a70091faf220d2-01",
"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": "00-6bf2217574bc03de2bd9c6388deea1c3-e7583030e624d13b-01",
"x-deno-userspace-tracestate": ""
}
|
||||