ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace oVBRd309

First seen: 2026-07-03 04:21:48.195 UTC
User-Agent: LinkedInBot/1.0 (compatible; Mozilla/5.0; Apache-HttpClient +http://www.linkedin.com)
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
2026-07-03 04:21:48.195 UTC +0 ms homepage GET LinkedInBot/1.0 (compatible; Mozilla/5.0; Apache-HttpClient +http://www.linkedin.com)
request headers (14) 
{
  "accept": "*/*",
  "accept-encoding": "gzip,deflate",
  "connection": "Keep-Alive",
  "host": "uatracer.com",
  "range": "bytes=0-3145727",
  "service-name": "babylonia-nearline-ingestion",
  "traceparent": "00-8edb75bf46545c32002243d18cccc12b-67968013d8df45b9-01",
  "tracestate": "",
  "user-agent": "LinkedInBot/1.0 (compatible; Mozilla/5.0; Apache-HttpClient +http://www.linkedin.com)",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-li-calltree-request-id": "AAAAAAAAAAAAAAAAAAAAAA==",
  "x-li-r2-w-ic-1": "com.linkedin.container.rpc.trace.rpcTrace=,serviceCallTraceData=%7B%22version%22%3A5%2C%22treeId%22%3A%22AAZVrUNZv83WKUWVMpmFnQ%3D%3D%22%2C%22rqId%22%3A0%2C%22caller%22%3A%7B%22env%22%3A%22%22%2C%22container%22%3A%22%22%2C%22service%22%3A%22%22%2C%22version%22%3A%2250.0.665%22%2C%22machine%22%3A%22%22%2C%22physical%22%3A%22%22%2C%22instance%22%3A%22%22%2C%22slice%22%3A%22051602f6-92fe-4373-8f49-80ad6b5933c7%22%2C%22sliceInstance%22%3A%22babylonia-nearline-ingestion-4-2xq24-kb4kw%22%7D%2C%22taskId%22%3A1%2C%22scale%22%3A0.0%2C%22enabled%22%3Afalse%2C%22context%22%3A%7B%22traceContext%22%3A%22babylonia_async_ingestion_processor%22%7D%7D",
  "x-li-r2-w-ic-1-com.linkedin.container.rpc.trace.rpctrace": "",
  "x-li-r2-w-ic-1-servicecalltracedata": "{\"version\":5,\"treeId\":\"AAZVrUNZv83WKUWVMpmFnQ==\",\"rqId\":0,\"caller\":{\"env\":\"\",\"container\":\"\",\"service\":\"\",\"version\":\"50.0.665\",\"machine\":\"\",\"physical\":\"\",\"instance\":\"\",\"slice\":\"051602f6-92fe-4373-8f49-80ad6b5933c7\",\"sliceInstance\":\"babylonia-nearline-ingestion-4-2xq24-kb4kw\"},\"taskId\":1,\"scale\":0.0,\"enabled\":false,\"context\":{\"traceContext\":\"babylonia_async_ingestion_processor\"}}"
}
2026-07-03 04:21:49.621 UTC +1426 ms Open Graph image GET LinkedInBot/1.0 (compatible; Mozilla/5.0; Apache-HttpClient +http://www.linkedin.com)
request headers (7) 
{
  "accept-encoding": "gzip,deflate",
  "connection": "Keep-Alive",
  "host": "uatracer.com",
  "traceparent": "00-72df807fb0561a6eb3451631f642abe0-51abd366230f3fac-01",
  "tracestate": "",
  "user-agent": "LinkedInBot/1.0 (compatible; Mozilla/5.0; Apache-HttpClient +http://www.linkedin.com)",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}
2026-07-03 04:21:49.628 UTC +1433 ms image GET LinkedInBot/1.0 (compatible; Mozilla/5.0; Apache-HttpClient +http://www.linkedin.com)
request headers (9) 
{
  "accept-encoding": "gzip,deflate",
  "connection": "Keep-Alive",
  "host": "uatracer.com",
  "traceparent": "00-de61bb262105eec09986efeb3fb7802b-3075e62d33490c2f-01",
  "tracestate": "",
  "user-agent": "LinkedInBot/1.0 (compatible; Mozilla/5.0; Apache-HttpClient +http://www.linkedin.com)",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-de61bb262105eec09986efeb3fb7802b-34b8ebc02d8223c6-01",
  "x-deno-userspace-tracestate": ""
}