ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace SFyijonm

First seen: 2026-06-24 19:15:55.408 UTC
User-Agent: curl/8.7.1

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
2026-06-24 19:15:55.408 UTC +0 ms homepage GET curl/8.7.1
request headers (6) 
{
  "accept": "*/*",
  "host": "uatracer.com",
  "traceparent": "00-e7b8caa47830788e7223c9e6443a5edb-34e8a9b3f97dc126-01",
  "tracestate": "",
  "user-agent": "curl/8.7.1",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-06-24 19:15:58.747 UTC +3339 ms apple-touch-icon HEAD curl/8.7.1
request headers (6) 
{
  "accept": "*/*",
  "host": "uatracer.com",
  "traceparent": "00-c06b3562262c2d168b5ebcdd482cbc42-c4fb6b64b914f097-01",
  "tracestate": "",
  "user-agent": "curl/8.7.1",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-06-24 19:16:00.139 UTC +4731 ms favicon HEAD curl/8.7.1
request headers (8) 
{
  "accept": "*/*",
  "host": "uatracer.com",
  "traceparent": "00-37ec9b7227fe3c9f3bd74a6e079931ee-9907f033bf8019e4-01",
  "tracestate": "",
  "user-agent": "curl/8.7.1",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-37ec9b7227fe3c9f3bd74a6e079931ee-79c3960bfbdf3e9f-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-24 19:16:01.515 UTC +6107 ms font (HTML) HEAD curl/8.7.1
request headers (8) 
{
  "accept": "*/*",
  "host": "uatracer.com",
  "traceparent": "00-2e4bca37af893b0094eb19426af418c7-fff45a4dc5f3b009-01",
  "tracestate": "",
  "user-agent": "curl/8.7.1",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-2e4bca37af893b0094eb19426af418c7-7bdc6b42c0179f13-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-24 19:16:03.091 UTC +7683 ms JS HEAD curl/8.7.1
request headers (8) 
{
  "accept": "*/*",
  "host": "uatracer.com",
  "traceparent": "00-89206c59ec3e6b699199b6ff0d192376-0ca3128e9d909612-01",
  "tracestate": "",
  "user-agent": "curl/8.7.1",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-89206c59ec3e6b699199b6ff0d192376-092c93fcec120c82-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-24 19:16:04.491 UTC +9083 ms web app manifest HEAD curl/8.7.1
request headers (8) 
{
  "accept": "*/*",
  "host": "uatracer.com",
  "traceparent": "00-9957182e2261d8339aa83c61da8e1157-81b850b0790026c3-01",
  "tracestate": "",
  "user-agent": "curl/8.7.1",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-9957182e2261d8339aa83c61da8e1157-4404e2845bf14147-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-24 19:16:05.869 UTC +10461 ms ES module HEAD curl/8.7.1
request headers (8) 
{
  "accept": "*/*",
  "host": "uatracer.com",
  "traceparent": "00-eab2c7a0ed2c63fc0a3e750df5b00788-28a03a674520b6fc-01",
  "tracestate": "",
  "user-agent": "curl/8.7.1",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-eab2c7a0ed2c63fc0a3e750df5b00788-5287fe3a1f5c3f06-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-24 19:16:07.435 UTC +12027 ms image HEAD curl/8.7.1
request headers (6) 
{
  "accept": "*/*",
  "host": "uatracer.com",
  "traceparent": "00-a03675e6c05b5f38cae7fb8209f7a574-c6ba0a0a5b1dbfc8-01",
  "tracestate": "",
  "user-agent": "curl/8.7.1",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-06-24 19:16:08.827 UTC +13419 ms prefetch HEAD curl/8.7.1
request headers (8) 
{
  "accept": "*/*",
  "host": "uatracer.com",
  "traceparent": "00-771c3eddb979b13896c8f3caa1de1da4-a92a9a3ddaa379d8-01",
  "tracestate": "",
  "user-agent": "curl/8.7.1",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-771c3eddb979b13896c8f3caa1de1da4-bf0711c400517f7b-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-24 19:16:10.275 UTC +14867 ms preload (image) HEAD curl/8.7.1
request headers (6) 
{
  "accept": "*/*",
  "host": "uatracer.com",
  "traceparent": "00-4d0ada6603781260238074ecac472d39-dcb3b3a805d9e529-01",
  "tracestate": "",
  "user-agent": "curl/8.7.1",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-06-24 19:16:11.650 UTC +16242 ms CSS HEAD curl/8.7.1
request headers (8) 
{
  "accept": "*/*",
  "host": "uatracer.com",
  "traceparent": "00-5f69199e6b22db9202b285b53436e32a-37e477bc34aac455-01",
  "tracestate": "",
  "user-agent": "curl/8.7.1",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-5f69199e6b22db9202b285b53436e32a-e7297a93917a35a6-01",
  "x-deno-userspace-tracestate": ""
}