ua-tracer
by Paul Kinlan
trace SUwK5O15
what does a user agent actually fetch, follow & run?
Trace SUwK5O15
First seen: 2026-08-08 05:16:07.364 UTC
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
Bot verification: ✓ verified ClaudeBot IP checked against published bot CIDR ranges; IP in ClaudeBot published range.
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 |
|---|---|---|---|---|
| 2026-08-08 05:16:07.364 UTC | +0 ms | homepage | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
request headers (7){
"accept": "*/*",
"accept-encoding": "gzip, br, zstd, deflate",
"host": "uatracer.com",
"traceparent": "00-b12a4f6e7a907e672394137ad4865c59-26659e480fe67f1d-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-08-08 06:35:34.707 UTC | +4767343 ms | JS | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
request headers (9){
"accept": "*/*",
"accept-encoding": "gzip, br, zstd, deflate",
"host": "uatracer.com",
"traceparent": "00-64326757225fa248d18e5effed80c7c0-37b2073c02c1439d-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-64326757225fa248d18e5effed80c7c0-f6727682cf1f8487-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-08-08 06:35:35.047 UTC | +4767683 ms | CSS | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
request headers (9){
"accept": "*/*",
"accept-encoding": "gzip, br, zstd, deflate",
"host": "uatracer.com",
"traceparent": "00-587d1565b3481455bde85926c57119da-231fc0abd717683d-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-587d1565b3481455bde85926c57119da-c40d6771445e4cf6-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-08-08 06:35:35.603 UTC | +4768239 ms | iframe document | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
request headers (9){
"accept": "*/*",
"accept-encoding": "gzip, br, zstd, deflate",
"host": "uatracer.com",
"traceparent": "00-e099126995717621fb6613d818a78400-7d752dafa44caff2-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-e099126995717621fb6613d818a78400-dd8705feec8f4b13-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-08-08 06:35:36.203 UTC | +4768839 ms | ES module | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
request headers (9){
"accept": "*/*",
"accept-encoding": "gzip, br, zstd, deflate",
"host": "uatracer.com",
"traceparent": "00-f730a8ce1abf31143b8e37eed9adf776-97586e9b1cf13aec-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-f730a8ce1abf31143b8e37eed9adf776-9b3ce293cf7fcae0-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-08-08 06:36:20.705 UTC | +4813341 ms | web app manifest | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
request headers (7){
"accept": "*/*",
"accept-encoding": "gzip, br, zstd, deflate",
"host": "uatracer.com",
"traceparent": "00-0f9641b607518971ef983ceca9f24677-f9983195c1e40b96-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-08-08 06:36:21.023 UTC | +4813659 ms | font (HTML) | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
request headers (7){
"accept": "*/*",
"accept-encoding": "gzip, br, zstd, deflate",
"host": "uatracer.com",
"traceparent": "00-63957a89f63d7f4e790ac224344addaf-468e3aece5a87ff5-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-08-08 06:36:21.616 UTC | +4814252 ms | prefetch | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
request headers (7){
"accept": "*/*",
"accept-encoding": "gzip, br, zstd, deflate",
"host": "uatracer.com",
"traceparent": "00-ffdeed85d7f96bc8f38379eee02a8d01-cc46a21131c613a4-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-08-08 06:38:23.435 UTC | +4936071 ms | image | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
request headers (7){
"accept": "*/*",
"accept-encoding": "gzip, br, zstd, deflate",
"host": "uatracer.com",
"traceparent": "00-a2d2bffe82ef629158eb39d218597227-ed76e6856cc61b40-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-08-08 06:38:23.766 UTC | +4936402 ms | apple-touch-icon | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
request headers (7){
"accept": "*/*",
"accept-encoding": "gzip, br, zstd, deflate",
"host": "uatracer.com",
"traceparent": "00-60a40d6cbd1fe89379c11600324e9e9d-b7fcdd67eaaf21f2-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-08-08 06:38:24.248 UTC | +4936884 ms | preload (image) | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
request headers (7){
"accept": "*/*",
"accept-encoding": "gzip, br, zstd, deflate",
"host": "uatracer.com",
"traceparent": "00-f96d74360d3bd1538cc7946269c8d35a-f652fe515e4397ab-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-08-08 06:38:24.748 UTC | +4937384 ms | favicon | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
request headers (7){
"accept": "*/*",
"accept-encoding": "gzip, br, zstd, deflate",
"host": "uatracer.com",
"traceparent": "00-7b32e68d21bb626783cb77c6cae3b3a4-5d7752ad0327478b-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-08-08 08:07:02.521 UTC | +10255157 ms | image inside iframe | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
request headers (7){
"accept": "*/*",
"accept-encoding": "gzip, br, zstd, deflate",
"host": "uatracer.com",
"traceparent": "00-9617618e74525bfe52fe3de87b72f908-bc243284b616a549-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
"via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
|
||||