ua-tracer
by Paul Kinlan
trace W9Aknfdl
what does a user agent actually fetch, follow & run?
Trace W9Aknfdl
First seen: 2026-09-25 15:34:49.874 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 |
|---|---|---|---|---|
| 2026-09-25 15:34:49.874 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=:nnyN5iKLnL9tU0hh3nc8zBjRp2Oxjjf80wZNY8hppk+aGT/2hvOBUHWau8QpCTR7449nh5JMf3KTPcD59ze0CA==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1790350489;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1790350549;nonce=\"K0FJQXRKOjwHk5W8_YL5PYGGFnFBNAtkXysH2TkDgFzqGM4f4b9So9aq3IcciLnkddGE2A3SGceCB-6J-Oo6iA\";tag=\"web-bot-auth\"",
"traceparent": "00-36f82d72afaeafc650388bb42a99bdc9-6b055a8a2b01ba0d-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": "00-36f82d72afaeafc650388bb42a99bdc9-b96797adff245174-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-09-25 15:37:23.430 UTC | +153556 ms | JS | 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=:4az5XHamxOYP1xZ+MQ8DPItzYOcxl2v3W6PD4rmBFgY+R5aFJLC1/wLlQKZWe1R+OiPoEI2Fh1l9kQ9RJ60cDw==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1790350643;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1790350703;nonce=\"4Mlb_0R6qnHL2xOVWckrrFd1tzYjhCpIpETHZlFu-vATPX_STSZv9Hvb-Bj7AAQENpXJ1eteDKtzQhW4G6Pdsw\";tag=\"web-bot-auth\"",
"traceparent": "00-69b6a14dcf519984ff365833b7ed94c0-de8190883c0b1269-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-09-25 15:37:24.432 UTC | +154558 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=:jumP5wcn2hxn3Vl6CG/31o0N9UDUhYuqlhi34q9J8AhW/IO/KpaloQMePB/pRmDOXJZB9lERjpUwK4tbSgSnAg==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1790350644;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1790350704;nonce=\"0aFGai--DnWocbdTDJsfsuAB8tvkn8jfPKihxxUXcL6R-ubQtc8DN6wHV9r6LxzOS_CObRlY1jR62mRFZAmwRg\";tag=\"web-bot-auth\"",
"traceparent": "00-d157cdb5540a957435650538a2379566-844449a813a9c4ca-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-d157cdb5540a957435650538a2379566-a53a9cd646b589ec-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-09-25 15:37:25.367 UTC | +155493 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=:LYvtiofdAT1iZvGlRfQZtttI/HvNX3yzr0u/kmBZvMobMjZUPaU+uF6CeztHpEQrR/r22d3WS56h9bPMUhAeAg==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1790350645;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1790350705;nonce=\"51iToE1dmYk2nmrZ1RgYPOMAa2aLoXq7YgpAXk7NIQ5KTJO-JKN3HKMZ5UrON4k_iegK-zU-pHWttHQqwuwsTg\";tag=\"web-bot-auth\"",
"traceparent": "00-fc7444d20e9f232a420ef4bd7329a6c7-460344c3bb6fa989-01",
"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-fc7444d20e9f232a420ef4bd7329a6c7-4ed3cc94782b46d7-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-09-25 15:37:26.296 UTC | +156422 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=:Zcqzr1TAP0fODZj12e9zSynVzMO+8B5A2k3GEJz78a8cR7aShcOk3vgqsgcgBFmuPA6gz6l1ilDFy9963abSBg==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1790350646;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1790350706;nonce=\"ic0RiP0dhQW2WtY_otJP-59MLzB5u98KpE-ZUq1efiSJApWgIDGXxQ8rr_02UbgveaU4SBniu0Oxh6Dvxuj0Zw\";tag=\"web-bot-auth\"",
"traceparent": "00-b51c9e6b41724179a7c877a88dadb76c-39f7f8e1ea8bffdc-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-b51c9e6b41724179a7c877a88dadb76c-0509c2f0abad0a7d-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-09-25 15:37:27.187 UTC | +157313 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=:0r9xBP0mBC4PYAAeliCKBM1TUxDm7bBffXcj/qapr2RzIBYpthodPRxbbM2P6HGfg/W7bPVoXami0QHUQMs2AQ==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1790350647;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1790350707;nonce=\"ZztJaGCGYXa78q1MsmlUQPoDL2rhai9JP2Pe3IDGqdjtXRgBDV99u2KPt0vBly2MKf-do6XRKRTr8eTH7iHFGQ\";tag=\"web-bot-auth\"",
"traceparent": "00-a5c4a37b579630ce1821ae2b05d8b713-4bba49a884f91274-01",
"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-a5c4a37b579630ce1821ae2b05d8b713-7ee929755676e548-01",
"x-deno-userspace-tracestate": ""
}
|
||||