ua-tracer
by Paul Kinlan
trace Mpf8tUIx
what does a user agent actually fetch, follow & run?
Trace Mpf8tUIx
First seen: 2026-08-29 13:56:08.920 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 |
|---|---|---|---|---|
| 2026-08-29 13:56:08.920 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=:thY7y0CcAXK3tCUfUb+Pcz7Hg0Rfqlz4SUVJb4NWz2F7HIO3ajUoj24a72lYZRsdM3YMkm9wJTBkIneEr5mFCA==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1788011768;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1788011828;nonce=\"R7nkmpFotJnAyfadxM4Mm-dj7W4Ng2l2Ff7fhUUAIk8VYgWlKY74xDOgJbBGfGQa051YwtZEnwrS3fp7-m7iQA\";tag=\"web-bot-auth\"",
"traceparent": "00-b07ce9c81704c4375ac4455079b4d4da-145478d33b91c9b9-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-08-29 13:59:26.345 UTC | +197425 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=:YKys+nrwvCLYr8v02tKGOO+OcPXGzG1uTjE98LebrQ9L4gVDVkBB+cRrzCovLpt12MULA4WvYy8yjPWC+FRsAA==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1788011966;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1788012026;nonce=\"rVW9FJmsBcuml_6LEOjxL75cCKku-JYEejjqY8KJBe_wLpF-Rqbn9Cfn2wFYMV1J7SR57VYfAPagvbkPg4HOTQ\";tag=\"web-bot-auth\"",
"traceparent": "00-cedf04b7bbbf0d784d88759d3d9cfd88-011167dcc7607d61-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-08-29 13:59:27.647 UTC | +198727 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=:D9gaCIZv1plBcEz07fmVQmllXGIhUiBTTIM7obPx4NXKuTgObGWWbDN2g3kO09KZF5oPIVGCR4Y6anpC+O2ICQ==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1788011967;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1788012027;nonce=\"JrtLESUPmrtc3kXnpaG-29ntEYxF9kAI-ib4Ur7IxHYLKPtfEl-PzCFK6BR55wKSDqLUpBoPjfnwjzM-E6_YAw\";tag=\"web-bot-auth\"",
"traceparent": "00-986d6a7a334fca1fad27a3518b4dc1ee-4479b63a0460ecd7-01",
"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": "00-986d6a7a334fca1fad27a3518b4dc1ee-90a66208c699cfdd-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-08-29 13:59:28.915 UTC | +199995 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=:wQ2E83EMu0Z5aG1IEllHnegLryF3TO8WM+j943EC6kM6rV/gO+xzHYzmZ2zdOa6S2yqLN71+sGslD0waEy4IBQ==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1788011968;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1788012028;nonce=\"Dt_OlVq3GvrR0fIHv8OBU2s4oiD-yCQ--fpp3cjBUt2xisX2-_h7RufpYNoN3pv33ESKh_SON-HXU7fJeQ6nAA\";tag=\"web-bot-auth\"",
"traceparent": "00-ebf1ed3456d44beb72604ac0044c76d1-444c4cbec26464d5-01",
"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-ebf1ed3456d44beb72604ac0044c76d1-b1a5cf6760b40f5e-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-08-29 13:59:30.062 UTC | +201142 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=:CuRbjhVEmzQuF3h0QyN8lQGOC/y5T2/L9r+m2TjbBIcXEFWGUX3QcISBzmxk4fhG1qUZjVjjtBd81EzHB8gNDg==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1788011970;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1788012030;nonce=\"mhwbQrT_-Fk7MIIs4w8637i8Pq19zaQzKVl21efV5R2KpxxQRXZIuTC3sBoqS0t-3rpmg83CgsE2hkLv4jGJ1A\";tag=\"web-bot-auth\"",
"traceparent": "00-781edc8aa61c760bfcdb7dd71374fe12-2f67e02f2026af4b-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": "00-781edc8aa61c760bfcdb7dd71374fe12-99bb875c83c14f74-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-08-29 13:59:31.343 UTC | +202423 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=:6EJDtqUFuwKd/+0vjKm6yMNVBLjNYil+M/rEF9AFwYam0DtOjFzCeDbj2karXZS70RQ1JtZtxVgVeYKcIEEDAw==:",
"signature-agent": "\"https://ahrefs.com\"",
"signature-input": "sig=(\"@authority\" \"signature-agent\");created=1788011971;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1788012031;nonce=\"Gv8IFt10Qu0oENVKfqGLmy9AKIHY255SwddWewsyUzIUMfN04MyRrQcgzK13TbmgJNRdJQmEN25pQR-DgWLA5Q\";tag=\"web-bot-auth\"",
"traceparent": "00-dc11ee61cbe02643a6322272a35d334f-85ac5a9159360923-01",
"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-dc11ee61cbe02643a6322272a35d334f-9d7f3693a5ad7dc2-01",
"x-deno-userspace-tracestate": ""
}
|
||||