ua-tracer by Paul Kinlan

trace ZaV2ZCAa

ua-tracer

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

← all traces

Trace ZaV2ZCAa

First seen: 2026-07-16 21:59:00.839 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
2026-07-16 21:59:00.839 UTC +0 ms homepage GET Twitterbot/1.0
request headers (13) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "finagle-ctx-com.twitter.finagle.retries": "0",
  "host": "uatracer.com",
  "traceparent": "00-7fcf382dcd35d29b1d8a634812ac63df-75a0ab1629565987-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17146314754",
  "x-b3-parentspanid": "1c8980e7784f8748",
  "x-b3-sampled": "false",
  "x-b3-spanid": "8b58509f287237aa",
  "x-b3-traceid": "43b84341dcc6c39c"
}
2026-07-16 21:59:02.313 UTC +1474 ms Twitter card 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-bc6332d6662ddba33ede2d76a0f343f1-781b2c8332192436-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17146314754",
  "x-b3-parentspanid": "d2dcf97dbe4945e3",
  "x-b3-sampled": "false",
  "x-b3-spanid": "a2b2b2472dbfeca2",
  "x-b3-traceid": "43b84341dcc6c39c",
  "x-deno-userspace-traceparent": "00-bc6332d6662ddba33ede2d76a0f343f1-5c2364b67360f4a8-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-16 21:59:02.315 UTC +1476 ms Open Graph 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-a16b7f349da51eb13d90c36b3c1cd8d4-64d498c3c338f069-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17146314754",
  "x-b3-parentspanid": "1d016b2266207bcc",
  "x-b3-sampled": "false",
  "x-b3-spanid": "0813ab7f5b8ef693",
  "x-b3-traceid": "43b84341dcc6c39c"
}
2026-07-17 01:49:03.270 UTC +13802431 ms Open Graph 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-e4c32a79b2a0cafe73e16b6013f1e4ed-9274a3e31be962df-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17146314754",
  "x-b3-parentspanid": "0a30136b5ccdc9cc",
  "x-b3-sampled": "false",
  "x-b3-spanid": "9bcb105044d8e236",
  "x-b3-traceid": "0000000000000000e0503844561cb654"
}
2026-07-24 02:11:05.313 UTC +619924474 ms Open Graph image GET Twitterbot/1.0
request headers (13) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "finagle-ctx-com.twitter.finagle.retries": "0",
  "host": "uatracer.com",
  "traceparent": "00-9b2ca2e4ab83f928fdb78d58d83b5522-e1ac0e2f723404a2-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17146314754",
  "x-b3-parentspanid": "4dee499d93986b6e",
  "x-b3-sampled": "false",
  "x-b3-spanid": "b2044f65ecb2fa65",
  "x-b3-traceid": "000000000000000058dee10742d60048"
}
2026-07-24 02:11:05.341 UTC +619924502 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-b9ac86ea5bf34b5c88c46a7970e9d7ca-1fc6e945526cea67-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17146314754",
  "x-b3-parentspanid": "2d495fa0df008ef8",
  "x-b3-sampled": "false",
  "x-b3-spanid": "6560e49bf036f2f7",
  "x-b3-traceid": "000000000000000058dee10742d60048"
}
2026-07-25 05:53:22.944 UTC +719662105 ms Open Graph 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-de036d0a103ae7685f526bb99f2bca55-0751ffb60a2b396e-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17146314754",
  "x-b3-parentspanid": "9f03671b2adadb33",
  "x-b3-sampled": "false",
  "x-b3-spanid": "84de2c5282cb937e",
  "x-b3-traceid": "0000000000000000031c6b5389acadb0"
}
2026-07-25 05:53:22.967 UTC +719662128 ms Open Graph 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-d0cb99c03f13bd5540d5e61bded19c5d-8048b27d8d1c09f5-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17146314754",
  "x-b3-parentspanid": "843fb1f40fa87ff0",
  "x-b3-sampled": "false",
  "x-b3-spanid": "1c164677b044e187",
  "x-b3-traceid": "0000000000000000031c6b5389acadb0"
}
2026-07-25 05:53:22.974 UTC +719662135 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-cbea3ecf7d320feb65f26e480d85be30-3d201137a4e8897e-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17146314754",
  "x-b3-parentspanid": "929a3171e2edb3c7",
  "x-b3-sampled": "false",
  "x-b3-spanid": "5f6eab6ec1f41eae",
  "x-b3-traceid": "0000000000000000031c6b5389acadb0"
}