ua-tracer by Paul Kinlan

trace eTkfNgaY

ua-tracer

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

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Trace eTkfNgaY

First seen: 2026-11-05 22:33:38.284 UTC
User-Agent: Twitterbot/1.0
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
2026-11-05 22:33:38.284 UTC +0 ms homepage GET Twitterbot/1.0
request headers (15) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "finagle-ctx-com.twitter.finagle.retries": "0",
  "host": "uatracer.com",
  "traceparent": "00-d4089b138644b3e9e8db988e11f5779a-937c0926cab419ec-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17146314754",
  "x-b3-parentspanid": "a71fd41c7f7712e6",
  "x-b3-sampled": "false",
  "x-b3-spanid": "c1e9dfa2e583c34a",
  "x-b3-traceid": "a50a98ec2cd038017c0ce934ac153e6f",
  "x-deno-userspace-traceparent": "00-d4089b138644b3e9e8db988e11f5779a-3abe60db8f276ccf-01",
  "x-deno-userspace-tracestate": ""
}
2026-11-05 22:33:40.044 UTC +1760 ms Twitter card image GET Twitterbot/1.0
request headers (13) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "finagle-ctx-com.twitter.finagle.retries": "0",
  "host": "uatracer.com",
  "traceparent": "00-851b841a34069f48197e38d66b23e8a0-b17c688d67ffbfcb-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17146314754",
  "x-b3-parentspanid": "c36de9b019c08305",
  "x-b3-sampled": "false",
  "x-b3-spanid": "f3b741fbbc7bb726",
  "x-b3-traceid": "a50a98ec2cd038017c0ce934ac153e6f"
}
2026-11-05 22:33:40.216 UTC +1932 ms Open Graph image GET Twitterbot/1.0
request headers (15) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "finagle-ctx-com.twitter.finagle.retries": "0",
  "host": "uatracer.com",
  "traceparent": "00-1b3f826c68f567693d2af7b68b56fc2b-c732e82bd8d765db-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17146314754",
  "x-b3-parentspanid": "6057fc5ea5246e54",
  "x-b3-sampled": "false",
  "x-b3-spanid": "8aff7e3127d400be",
  "x-b3-traceid": "a50a98ec2cd038017c0ce934ac153e6f",
  "x-deno-userspace-traceparent": "00-1b3f826c68f567693d2af7b68b56fc2b-856c72b4fc314b1d-01",
  "x-deno-userspace-tracestate": ""
}