ua-tracer
by Paul Kinlan
trace WEvzFxbQ
what does a user agent actually fetch, follow & run?
Trace WEvzFxbQ
First seen: 2026-10-17 15:55:56.326 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 |
|---|---|---|---|---|
| 2026-10-17 15:55:56.326 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=:6/iHL2RQt7nu8DEVDoj7U8CoMyBDUVECWozLC0Zzo+L3QHIG0mBvD/iZ97ojzX/DPuaW2TT6ZEbJT3k7jHrQDw==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1792252555;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1792252615;nonce=\"kK79SjvP9LsOebqSjoL9eDEcL9ohkj_ppxu9siHqIKkVwJzr6Jeihp3MCwH4WPlVvDtyiiWitOilyioUpuNqMw\";tag=\"web-bot-auth\"",
"traceparent": "00-0018af4140daabf855405872fe2a2891-57350a9a89c0310c-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-10-17 15:56:07.765 UTC | +11439 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=:Ji94jZyujyTCPqeBaH18Vo5Miz+59AmfPiNBulboT4REWkWmsvvU0IeAkhumzcjwB3DjTLC7L8Xmy+2Ds1WKAQ==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1792252567;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1792252627;nonce=\"e0Jo9PSY81nUU2fkdI5GQIAp0kvu486pOMDzf_91f75t3aDE6Ba5tzzScHiYxrxmoGNxTtzb6oOJKYSlEADLvg\";tag=\"web-bot-auth\"",
"traceparent": "00-777706d7bf2762fc926ca549ea5a67a9-d78181d51fbced69-01",
"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": "00-777706d7bf2762fc926ca549ea5a67a9-1cd9d8f6eedc09f2-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-17 15:56:08.893 UTC | +12567 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=:Jo3IQvg0/l5eirgHRUBF8cTyN3dAmarPrJJgag/dYSuYiYb1BEGd0JyPQk7eEZYtDe77vKvgzruJK5xJPQZ0Dw==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1792252568;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1792252628;nonce=\"4EsxkNbHqZH5VNoOwfe5pTXEOhvFj_gXzWCNHrE4JWd_TwLMvaRQ_3BY_7kvGPOzCFlbWhuJU0DzitXqmKwD3g\";tag=\"web-bot-auth\"",
"traceparent": "00-6764446c20e093c6533d722fa119adc9-b9cc1048c9ccefdd-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": "00-6764446c20e093c6533d722fa119adc9-bc9a1fe4490cccbf-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-17 15:56:09.952 UTC | +13626 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=:bivdQ3Tr8/gDjboeLPpkCiPGJbxgD+pTnAhbxnqh0AzDiBqhTgUJwFpAkbh+HNZYUHO0uu+JYUECrpb1lGfmAQ==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1792252569;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1792252629;nonce=\"AK6dpk7NSaZtQEfkRSE5tvqCzh3qHe0fmEhPzEdxKvNEaMIDZ5G8vC9jY4ptLcWjb_UktpS5oB25TYQTShQzsA\";tag=\"web-bot-auth\"",
"traceparent": "00-7912de62822ee664899aa1e84056b525-03bc0d1c2c2e22cc-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": "00-7912de62822ee664899aa1e84056b525-12ebae41ef041a82-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-17 15:56:11.027 UTC | +14701 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=:BbnClpVxy4tJW2FY8oThOQkIj2f0h4B6zBQwRWMNbWzLWElv6jQZ9fcd1o3gOn0JveUbNKjmit7z3LOl2z5kDg==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1792252570;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1792252630;nonce=\"dbZcUjQfjqCMZA7JdyAUcqGnifvfEfQ84kYXyvSO4_fmqwatZ1se_MTCkH7nPKWSkUkiL5XaquWkUOsQF0AVnw\";tag=\"web-bot-auth\"",
"traceparent": "00-945d1f7aba7eefdd48d61e15fdc87b39-d201fbf40616186a-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": "00-945d1f7aba7eefdd48d61e15fdc87b39-2fdae08334f13f0f-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-10-17 15:56:12.039 UTC | +15713 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=:s74xGnLPdbcwc3rkqM4jrQ9L0K1wdhn4rJ3aV0iKbddEhHDw3g0hJDW2giYxsy9rjXuA44dJ5ZczImHglACEDw==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1792252571;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1792252631;nonce=\"ykuTDEycqTJLYhnPurVqmFWPL5eo7Acn0G8AT7mdGCEl502348QA9qXqMKs2Rs9DJHthV7PF7weiDTC_kuF5OA\";tag=\"web-bot-auth\"",
"traceparent": "00-20f43a823a3a9ec0fd13d7bb659bd0ac-6f23f0b6286fc88c-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": "00-20f43a823a3a9ec0fd13d7bb659bd0ac-c3a0a2e22b38a9aa-01",
"x-deno-userspace-tracestate": ""
}
|
||||