ua-tracer by Paul Kinlan

trace deuYkPio

ua-tracer

what does a user agent actually fetch, follow & run?

← all traces

Trace deuYkPio

First seen: 2026-08-08 15:00:31.668 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.

ReceivedΔKindMethodUser-Agent
2026-08-08 15:00:31.668 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=:NXVRxoFt/xe+X9xMyAS2ZzKEMso0tM5/d2ni2u9bw9gzv+vtq46cf/6nre5KaI3MDet27GgYQoeCkUb7bdYWAA==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786201228;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786201288;nonce=\"2OnhkWj-p3dtd83KQXdsBZ0PG4oXF4yfasoPF3hFgFN6Tz8xMlcporK4gsGzIovV1JyL_eJMoWcqxL88WyRYyA\";tag=\"web-bot-auth\"",
  "traceparent": "00-58d36fc6de9f6c81f5791b2656d9bcb9-196716acb138d06e-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
2026-08-08 15:00:34.471 UTC +2803 ms JS GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (13) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=deuYkPio",
  "host": "uatracer.com",
  "priority": "u=1",
  "referer": "https://uatracer.com/",
  "sec-fetch-dest": "script",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-7c1c8e20d87785fab73a16be9feb2c34-a3fe0de29446e87c-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-08 15:00:34.475 UTC +2807 ms font (HTML) GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (14) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=deuYkPio",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "priority": "u=1",
  "referer": "https://uatracer.com/",
  "sec-fetch-dest": "font",
  "sec-fetch-mode": "cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-969d52e5dbd1a27684241f50bde9ecaf-1e488618e68cf67d-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-08 15:00:34.476 UTC +2808 ms iframe document GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (14) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=deuYkPio",
  "host": "uatracer.com",
  "priority": "u=0, i",
  "referer": "https://uatracer.com/",
  "sec-fetch-dest": "iframe",
  "sec-fetch-mode": "navigate",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-45f0d8e577b2afb0b8e0979ffcb5c180-bc05f38937260948-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-08 15:00:34.476 UTC +2808 ms ES module GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (14) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=deuYkPio",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "priority": "u=1",
  "referer": "https://uatracer.com/",
  "sec-fetch-dest": "script",
  "sec-fetch-mode": "cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-fe9511be1b5b3ab8a92869b2f7c89c35-7318240811491310-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-08 15:00:34.476 UTC +2808 ms CSS GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (13) 
{
  "accept": "text/css,*/*;q=0.1",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=deuYkPio",
  "host": "uatracer.com",
  "priority": "u=0",
  "referer": "https://uatracer.com/",
  "sec-fetch-dest": "style",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-33d1c567937b7e3451a6dba348754994-93a11be0b57f6f63-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-08 15:00:35.699 UTC +4031 ms CSS @import (nested stylesheet) GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (13) 
{
  "accept": "text/css,*/*;q=0.1",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=deuYkPio",
  "host": "uatracer.com",
  "priority": "u=0",
  "referer": "https://uatracer.com/r/deuYkPio/KL8UXtsR/style.css",
  "sec-fetch-dest": "style",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-ba7bbb19eec43e47b0db9ac3a7713c2c-af503112cae4ff13-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-08 15:00:37.050 UTC +5382 ms CSS @font-face GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (14) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=deuYkPio",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "priority": "u=0",
  "referer": "https://uatracer.com/r/deuYkPio/KL8UXtsR/style.css",
  "sec-fetch-dest": "font",
  "sec-fetch-mode": "cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-261b958b0a1f41cbdda8f7423df736fa-5d6e89b37f341cf2-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-08 15:00:38.376 UTC +6708 ms client timing POST POST Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (16) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "content-length": "2206",
  "content-type": "application/json",
  "cookie": "ua-tracer-trace=deuYkPio",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "priority": "u=4, i",
  "referer": "https://uatracer.com/",
  "sec-fetch-dest": "empty",
  "sec-fetch-mode": "cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-27c73f4081d9e1a3541156f2ed40464f-5a113e5a352b4f86-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-08 15:04:29.411 UTC +237743 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=:5a7miaL2JH64qM4jUw8qVB3DWysVsXE/P2lp+BMCNOFPKWPx1w7Uh0YLjwfGyarUEWCdPBFe9ltp+GgbSOumAQ==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786201469;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786201529;nonce=\"1KMHJOVrqylL-mmTCNYVP94lSKiMzRca1RrQ3ui3rrElLVMb5gfCidpcoM2AeNsQA-ftM6IB7nuUwmPYjG07aw\";tag=\"web-bot-auth\"",
  "traceparent": "00-ec49013e0dfeaa770913a1acceeeae8c-863e643138667c9e-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-ec49013e0dfeaa770913a1acceeeae8c-7abb10dfb0f3ad61-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-08 15:04:30.999 UTC +239331 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=:Rz1eH9EsbuRrgzKZg8IGB8iwtzLsLozmBwDjw5qg4orUkLVLX3eL0ZgVbe++BSDEUM9QEGc3c1SoSmPy3yrBDw==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786201470;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786201530;nonce=\"Heg-HmH9UgC--z1QOXqKgVHiR_yIPI3oS14GZeXdvk5iJRTSxmaGciwDqD4LGxxtVxTO9I0G1KqH2NDtzopREA\";tag=\"web-bot-auth\"",
  "traceparent": "00-df30d0d404fd9f30c53f76acd1e37e85-25188261cb213429-01",
  "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-df30d0d404fd9f30c53f76acd1e37e85-47264b672bf94eda-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-08 15:04:32.631 UTC +240963 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=:3JlXw6TrmMFeG1Z2TXSVS4dlI36OaQFHtacCNgwRlrWcjCxH84OOMjCeNcVVTh+FSy3+xeMWPL+aTUm56/auAw==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786201472;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786201532;nonce=\"oQryhL54o15fUcmiYQc4Fz7FqZ7dRbiT7foQHDrPL9mmu7WzAGR6r25fdSj-sGnJjJTlJxBH3vbcs0Sgv48VTA\";tag=\"web-bot-auth\"",
  "traceparent": "00-0a0440599cf546fe3cf2d3724e59220c-35ee9828dc0320fc-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": "00-0a0440599cf546fe3cf2d3724e59220c-1da326cde8b58fc7-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-08 15:04:33.925 UTC +242257 ms image 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=:WgUzFw441GNQrQaEBPj3n+7pxSEDJ/aLiHq7lyBHB0Xc6xPBOEtc12ywY7ad8Ai3oZV8iNwypztHt7ES0dQQDw==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786201473;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786201533;nonce=\"lh85Qim5YtjuE6zwNnGguMyKr8SrPFTJfFKTjDjhVqRaOJFVU8ML8gGhWab6XJYqBVMDq4ISNRLst629DYLXpA\";tag=\"web-bot-auth\"",
  "traceparent": "00-ad98aa3ca6d861dae6c0238570784d31-bfdb99c21d8def49-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
2026-08-08 15:04:35.160 UTC +243492 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=:9h5d0cQKBRzZuITClu1pLgdjyeURcht8/x4MHi7VpXRCl3yq18bDr7fzVD2pZWvvwvZwGf9M05PA7O+j1hweBg==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786201475;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786201535;nonce=\"GsFQKr1aYvARcU5Ixzf44Y3jm9tOiasibwDxg97oDbRpJD1pZFEruD74DuHvtP5s_UyJSQY7p8T6Ug5MUKLXog\";tag=\"web-bot-auth\"",
  "traceparent": "00-e88c966c0779a34d6eb2c1abf88ad50e-3544cd70017ca1fc-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}

Client-side resource waterfall

Reported by performance.getEntriesByType('resource') after JS ran in the UA. This proves a real browser-grade engine, not just a downloader.

ResourceInitiatorStartDurationTimeline
style.css link 4ms 2021ms
preload.png link 4ms 3ms
photo.png img 4ms 3ms
font.woff2 link 4ms 1652ms
main.js script 4ms 2675ms
module.js script 4ms 3034ms
prefetch.png link 6ms 1ms
iframe iframe 7ms 2341ms
import.css css 2025ms 1348ms
js-ran.gif?t=1786201236986 img 3374ms 0ms
css-bg.png css 3374ms 9ms
css-font.woff2 css 3374ms 738ms
module-ran.gif?t=1786201236997 img 3384ms 0ms