ua-tracer by Paul Kinlan

trace 9Ly2rAP8

ua-tracer

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

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Trace 9Ly2rAP8

First seen: 2026-08-19 09:48:36.951 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
2026-08-19 09:48:36.951 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": "00-46ebcbf2d2a9bd26fb16e8af3952efb8-a24249b51abd3305-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17167166818",
  "x-b3-parentspanid": "c718f6a4ebc34a01",
  "x-b3-sampled": "false",
  "x-b3-spanid": "ebb178ab81b19508",
  "x-b3-traceid": "be4b45143ab54027",
  "x-deno-userspace-traceparent": "00-46ebcbf2d2a9bd26fb16e8af3952efb8-1a47524dc55a5965-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-19 09:48:38.697 UTC +1746 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": "00-170d83366f6c9717d8e6a9203835ed3d-a146feccfac8b758-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17167166818",
  "x-b3-parentspanid": "b399d7b0091c1c7a",
  "x-b3-sampled": "false",
  "x-b3-spanid": "2d8a14199c77a16d",
  "x-b3-traceid": "be4b45143ab54027",
  "x-deno-userspace-traceparent": "00-170d83366f6c9717d8e6a9203835ed3d-cd7aebd787357427-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-19 09:48:38.698 UTC +1747 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": "00-9df618731e65c6bebf0c6e29261e2b9b-2b4ffd3d9977e221-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17167166818",
  "x-b3-parentspanid": "0d9295ca5d122549",
  "x-b3-sampled": "false",
  "x-b3-spanid": "07a1bced243a05d9",
  "x-b3-traceid": "be4b45143ab54027",
  "x-deno-userspace-traceparent": "00-9df618731e65c6bebf0c6e29261e2b9b-d0af3667f7321e09-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-21 13:19:25.201 UTC +185448250 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-bbeb7aa6f1cc1082d657b332473f657e-9775f0aefc831897-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17146314754",
  "x-b3-parentspanid": "d002805339300d71",
  "x-b3-sampled": "false",
  "x-b3-spanid": "43432c6679f59c11",
  "x-b3-traceid": "000000000000000063b454f5a5c360f7"
}
2026-08-21 13:19:25.213 UTC +185448262 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": "00-9086144a3bddc3f27401d06c40d79dcc-ba3afe53a3e9ef95-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17146314754",
  "x-b3-parentspanid": "23c646a610fec6cf",
  "x-b3-sampled": "false",
  "x-b3-spanid": "a82404d4f9497c1e",
  "x-b3-traceid": "000000000000000063b454f5a5c360f7",
  "x-deno-userspace-traceparent": "00-9086144a3bddc3f27401d06c40d79dcc-5ef9ce854896dbcf-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-22 14:12:14.797 UTC +275017846 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": "00-5b4d54f28cdc094a9fa78a8b1245f5ae-8da63f336f80df92-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17167166818",
  "x-b3-parentspanid": "23272884fb123cfc",
  "x-b3-sampled": "false",
  "x-b3-spanid": "43dbe741efd739d1",
  "x-b3-traceid": "219def93783d9751",
  "x-deno-userspace-traceparent": "00-5b4d54f28cdc094a9fa78a8b1245f5ae-71063ddc15a1dcbc-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-23 20:43:21.047 UTC +384884096 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": "00-028ade6ebedff2557770a72e359a2073-fa24b2b050db0e54-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17167166818",
  "x-b3-parentspanid": "b4051552676fc17a",
  "x-b3-sampled": "false",
  "x-b3-spanid": "22a9d1b8fe93643c",
  "x-b3-traceid": "285a7898a2a8bc25"
}
2026-08-25 02:10:01.379 UTC +490884428 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": "00-4783798ccda0770817abf642a5abdd71-4eade6ed3920d3f1-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17167166818",
  "x-b3-parentspanid": "dc1d2ade7de7ffcf",
  "x-b3-sampled": "false",
  "x-b3-spanid": "c97afe1af2f032d1",
  "x-b3-traceid": "f2aaf3c32f758d3b"
}
2026-08-30 06:10:18.936 UTC +937301985 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-cdcda16191628f50b9391f60b4708224-36037f9302c4b9af-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17167166818",
  "x-b3-parentspanid": "247c681c31e025ee",
  "x-b3-sampled": "false",
  "x-b3-spanid": "0252c7313562f816",
  "x-b3-traceid": "48eacce987ee66b8"
}
2026-08-30 09:20:37.786 UTC +948720835 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": "00-618eddc71231542253a3f6f74fd269df-812c0bba32827f7e-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17167166818",
  "x-b3-parentspanid": "54a6c85419735fff",
  "x-b3-sampled": "false",
  "x-b3-spanid": "c36e3d4b22ecd71e",
  "x-b3-traceid": "3c3fd33571654e96"
}
2026-08-31 09:51:47.759 UTC +1036990808 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": "00-0043f4474c65662db934c4fa7d6df7b0-103e84929231c729-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17167166818",
  "x-b3-parentspanid": "ab0c7bea2815d1df",
  "x-b3-sampled": "false",
  "x-b3-spanid": "98fcccc4c2c96416",
  "x-b3-traceid": "29134affccf9318e",
  "x-deno-userspace-traceparent": "00-0043f4474c65662db934c4fa7d6df7b0-25a79138fdd701dc-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-31 09:51:47.767 UTC +1036990816 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": "00-56aea8016d9e3c8f9f6fe93c7a36f912-c03d66de9a388cdd-01",
  "tracestate": "",
  "user-agent": "Twitterbot/1.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-flags": "17167166818",
  "x-b3-parentspanid": "336312ae531cd278",
  "x-b3-sampled": "false",
  "x-b3-spanid": "2f757fccddddb530",
  "x-b3-traceid": "29134affccf9318e",
  "x-deno-userspace-traceparent": "00-56aea8016d9e3c8f9f6fe93c7a36f912-23f1f566a0fb8048-01",
  "x-deno-userspace-tracestate": ""
}