ua-tracer by Paul Kinlan

trace x3sAW1wz

ua-tracer

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

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Trace x3sAW1wz

First seen: 2026-10-05 23:17:38.724 UTC
User-Agent: Mozilla/5.0 (compatible; ExaSearchBot/1.0; +https://crawler.exa.ai/)
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
2026-10-05 23:17:38.724 UTC +0 ms homepage GET Mozilla/5.0 (compatible; ExaSearchBot/1.0; +https://crawler.exa.ai/)
request headers (15) 
{
  "accept": "text/markdown,text/html;q=0.9,application/xhtml+xml;q=0.8,application/xml;q=0.7,image/webp;q=0.6,*/*;q=0.5",
  "accept-encoding": "gzip, deflate, br",
  "accept-language": "en-US,en;q=0.5",
  "cache-control": "no-cache",
  "host": "uatracer.com",
  "pragma": "no-cache",
  "signature": "sig=:nPog6iarqEMjOiTR73oTLBI+AplzVDfGAzhtJCXyYofnNzGcmgvNzBfXQLHqtdaTWhie82th4VGBe0qMKuHOAw==:",
  "signature-agent": "\"https://crawler.exa.ai\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");keyid=\"sDCpsJpgItYcmF_KhZozOUGIGL6a49yxE3f0yQR5SIA\";nonce=\"F8e4qrLHqBykBJh1KycKqunuXew7zNjxcdS/5Yay9z0lAIi6rJGwAF8PfWCc6bRi4xXKrNKSRjs675WiZVTtRQ==\";tag=\"web-bot-auth\";alg=\"ed25519\";created=1791242258;expires=1791242558",
  "traceparent": "00-72c5b1621dc1585ad2f961146efd11d6-fc00a7075dffedfe-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; ExaSearchBot/1.0; +https://crawler.exa.ai/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-72c5b1621dc1585ad2f961146efd11d6-45d00cc0057090e0-01",
  "x-deno-userspace-tracestate": ""
}