ua-tracer by Paul Kinlan

trace AT34KdR4

ua-tracer

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

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Trace AT34KdR4

First seen: 2026-09-16 15:29:42.221 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
2026-09-16 15:29:42.221 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=:bKJqa9dmiz7NBKOsvCry32IY2ftSD3SclTreg4oc9n3UAkvYt1Meyl0jwTdK+3oH8r3w208k0kKF/n2tpeK4AA==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1789572581;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1789572641;nonce=\"_3CxxVXNXm747PUeUqh_IPGM7cPU2pW_dXjGSmH6IFHJaxoBb2BqBOQD74wSuN6pmzMvltNPljaw72tn4qd_Ig\";tag=\"web-bot-auth\"",
  "traceparent": "00-d4b946ec5f2bf4b609ffd84856e582fa-27adcd5a7d696c5b-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
2026-09-16 15:31:27.475 UTC +105254 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=:DfvTIJjgCyS/M59mHD7A8QLvHcmMgEKUErkv0UNQqtMikogeU5u5AtyxNJb9r3oIwBrPOfa7YdVEi9Ek6iUHCA==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1789572687;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1789572747;nonce=\"GMVUzwuB8azTYt_VY5VlkS_EJ10Tfc6KE9ymcxOB09JRpLI9Q7iOfROZzY6XJTKraitNCAicrDpI_NC-taPk2A\";tag=\"web-bot-auth\"",
  "traceparent": "00-8435283795b11debdd41814479e1540c-978140c3a6797b5a-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": "00-8435283795b11debdd41814479e1540c-305e639ee849a236-01",
  "x-deno-userspace-tracestate": ""
}
2026-09-16 15:31:29.080 UTC +106859 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=:4kNi+CqoFPNOIpiJwoebeBaBMZ2dlDDyMyKnCaUbOrzvtbhcyA/OJAbOr3XR2bG8exrpKi1mqVKOwJyb2gTMAg==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1789572689;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1789572749;nonce=\"MvbpFRrhg1ExHXRqiuGOQOo0fpHfjNHyIy3kn_d1kmepFb-Gx0Fi-b53qTw0lxg8plJLZC5uHQcFhOmX13N29w\";tag=\"web-bot-auth\"",
  "traceparent": "00-aa11592100888e7e6821f5f926cc2438-afef74d3a4237ba6-01",
  "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-aa11592100888e7e6821f5f926cc2438-b97076d27e07f811-01",
  "x-deno-userspace-tracestate": ""
}
2026-09-16 15:31:30.158 UTC +107937 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=:zPVheAjX5Hn74kBKqYwFe3miB2u3fqioPQfjWHitMSqIkGGUnAndm/loEiHHFEfc8jW+cMKsJkkvZhW4qCctAw==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1789572690;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1789572750;nonce=\"zUkO1bBNiTmJxdodbOlVakNX4qrN57GqKdmDxBUSO_hTac9cw-FiFR5zrHVDxQuFXZeUJUFtoV-MK0S2uuZ1hQ\";tag=\"web-bot-auth\"",
  "traceparent": "00-9a256dff7d223750d84ff58e756ef3aa-c2a4955e3bc1df21-01",
  "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": "00-9a256dff7d223750d84ff58e756ef3aa-b8e1915a60a255fc-01",
  "x-deno-userspace-tracestate": ""
}
2026-09-16 15:31:31.159 UTC +108938 ms Open Graph 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=:/ZIJRZcCgUOEFBFZnkrtwXWkpdZld+poJ5qBQNhXz1ljVcQpbOKj7w08B4RC4QJR442anAlQgyjsRmXT649lCw==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1789572691;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1789572751;nonce=\"Fkdu6mlsUXbQJxUYJLdlgpXt43L3lVXLFVi0SEskhrB1oObKIZK2Bj_bBUC4wMiLdI9oMW9BDCrCT_7WnMtk8w\";tag=\"web-bot-auth\"",
  "traceparent": "00-10181eab60b9e7c8f17781bd39b0d2c4-01bf26b3b6f8e94c-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
2026-09-16 15:31:32.020 UTC +109799 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=:XDWdO3oBlLSmoBT7ZTlxYAlK0MoQ+8DjXqSUYfKEOub3kp+AhsS7dt4B2E+8M7FPtz5hrlBdCBDCV/3/H1kFBg==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1789572691;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1789572751;nonce=\"MPMMP-VD4uNUmQ3JyE7YYeo1b5pIFLCIzsYNOaJRfe8tq9uxm4fZuocnqB-ENdSZaJgpxAGp__XrWZyAXAvT3A\";tag=\"web-bot-auth\"",
  "traceparent": "00-8b48750dafd16c32ceb360a38d669fa2-278323c5a86bae27-01",
  "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": "00-8b48750dafd16c32ceb360a38d669fa2-23fef267340c14a7-01",
  "x-deno-userspace-tracestate": ""
}