ua-tracer
by Paul Kinlan
trace XVIhv1qj
what does a user agent actually fetch, follow & run?
Trace XVIhv1qj
First seen: 2026-09-01 14:11:41.996 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 |
|---|---|---|---|---|
| 2026-09-01 14:11:41.996 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=:3B4vZcBuNjK0O6VoD20OZvaYIW6G7XqvujTKWc/1uCTssuPXUyAY7IGzFdFWlU2lCIZu3CqMbGIB+G1BQjqjBA==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1788271901;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1788271961;nonce=\"9VqDmWdeYARSzLv_4Le7G_28fdm4srw1vf5eF6tKpUxv4G4HIldu7TwI-4g6E-g-uZ0-D5uOmVAEenXFnqY_AQ\";tag=\"web-bot-auth\"",
"traceparent": "00-53379aecc84e3a674baacbb5df3d4299-42cd0a98e0374d44-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-09-01 14:15:10.698 UTC | +208702 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=:xKnJOeSaorfo13oSfZft8eHkwjYBT0LLOklM0Byl+QGDBoV0U+nEEeLLnA8iI+b3RHVJ76hMrIvhbyqDYX3OBQ==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1788272110;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1788272170;nonce=\"ABpVS-dDO6dqif_0vCs-wp2THIZ0K2n18D3H-9QchIw5FuPAhj4Hn6eM1mV6TDMflgfb66-6AKmNtFgl6VwIPA\";tag=\"web-bot-auth\"",
"traceparent": "00-a7fde3a5eff301e963dcb2a0851b7aea-e7b469e54d9b696f-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-a7fde3a5eff301e963dcb2a0851b7aea-7e186ddaf7419de0-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-09-01 14:15:12.025 UTC | +210029 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=:v1D5BnGBuc38XDwd7ZwWwn7zs3j8qyTiEaDFwaJ3ElVrtqtKkcZWop3jNIP9Z6lomBMk+59UyRZHsiMW1SybDQ==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1788272111;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1788272171;nonce=\"ILvFxLTHF_gDwJrWJ38DJMHFVtF4mPzY4PiaS0wwjoo-ken1-5qkIR9VKmq0-yqRtwxNsA_5EqnRrOL1rMi0-Q\";tag=\"web-bot-auth\"",
"traceparent": "00-8ac203692bf818bde847fcfeb797d4b5-92f71930a98cc8e3-01",
"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": "00-8ac203692bf818bde847fcfeb797d4b5-0a9d408ecb446781-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-09-01 14:15:13.467 UTC | +211471 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=:WXGNU9HpLsgXiaTCPG673Ud3rAIvjd434D/YdimGPwaiFzLyNZBu9S1LTI6cX7PJbTTkHiUtgd1C9sIotQwxBA==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1788272113;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1788272173;nonce=\"kzsJ9P86l_l_W-i51t_Nk0AmnekHliuyhJlqgJkSHAV0gU-ppEir3RJjaVdJ60XDbM6YfamG9ia3eAdZbgDb2Q\";tag=\"web-bot-auth\"",
"traceparent": "00-44b7862bbdbcdd991ee9b4b24bc3b616-169a227fa765528a-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": "00-44b7862bbdbcdd991ee9b4b24bc3b616-769ac2a3588a728a-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-09-01 14:15:14.779 UTC | +212783 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=:YsfLDryZMJXgkXDHizT7iB55KHdtHYVqIwdoVBjfDVwRDimBGTnSmghmckgld/cDMVd/8TCVgFXFObjXCE+/Cw==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1788272114;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1788272174;nonce=\"tzf0XlDbpsnRcYZEzLieX_1rppCTD4-4u6azB-pdK1kjjLr4Zmg2UQZEHr3--IR__bu8sClzbd-y_8zcuDPWWQ\";tag=\"web-bot-auth\"",
"traceparent": "00-46a604789a59ff92997f586bdc6649d7-d60bd9e542317b58-01",
"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": "00-46a604789a59ff92997f586bdc6649d7-8652792477b93900-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-09-01 14:15:16.090 UTC | +214094 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=:a9ynqA2KXjB6fNeorZkIJQ8BsZim2iEd6UIlkrwMpLbli5XBqf7CqVZQFKCcSdNKOsinTFPyRH7K+8pUvWW3Dw==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1788272116;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1788272176;nonce=\"xfa-eH3endtMIZXwQPMMDtN6OOi-csc4zeLt4QvFJX52HR4sdrz-EiJDO2T_b_Bm-ESo0u_YNQSejEwRL0CcTA\";tag=\"web-bot-auth\"",
"traceparent": "00-bc5435fa96e9f79d89a7e9a14d442dbc-ea7475caa6ab0b5e-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-bc5435fa96e9f79d89a7e9a14d442dbc-a9348ae6a1afe70f-01",
"x-deno-userspace-tracestate": ""
}
|
||||