ua-tracer by Paul Kinlan

ua-tracer

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

All recent homepage requests, newest first. This page does not mint a new trace (unlike /), so you can browse the log without adding noise.

Recent homepage requests

Filter by user agent and the matching requests appear right below. Showing requests whose user agent contains Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html).

clear

No homepage requests match Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html).

By user agent

Running counts across the last 200 homepage requests (71 distinct agents). Click one to set the filter above.

User AgentRequestsJS ran
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:138.0) Gecko/20100101 Fir… 1 0
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeB… 1 0
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:92.0) Gecko/20100101 Fire… 1 0
Reeder/260600.02 CFNetwork/3886.100.1 Darwin/27.0.0 1 0
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, l… 1 1
Mozilla/5.0 (iPhone; CPU iPhone OS 27_0 like Mac OS X) AppleWebKit/605… 1 0
Mozilla/5.0 (compatible; MSIE 10.0; Windows Phone 8.0; Trident/6.0; IE… 1 0
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gec… 1 0
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605… 1 0
Mozilla/5.0 (iPhone; CPU iPhone OS 26_5_0 like Mac OS X) AppleWebKit/6… 1 0
Mastodon/4.5.10 (http.rb/5.3.1; +https://social.lostinok.com/) Bot 1 0
Mozilla/5.0 ua-tracer-verify 1 0
ua-tracer-verify/1.0 1 0
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605… 1 0
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36 (KHT… 1 0
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko)… 1 1
Mozilla/5.0 (X11; Linux x86_64; rv:83.0) Gecko/20100101 Firefox/83.0 1 0
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, l… 1 1
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/601.2.4 (K… 1 0
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KH… 1 1
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Fir… 1 1
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, l… 1 0
Mozilla/5.0 (iPhone; CPU iPhone OS 14_6 like Mac OS X) AppleWebKit/605… 1 1
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KH… 1 1
Mozilla/5.0 (iPhone; CPU iPhone OS 14_4 like Mac OS X) AppleWebKit/605… 1 0
← prev26–50 of 71next →

Unsolicited / well-known requests

Paths a user agent fetched on its own that ua-tracer never links to: robots.txt, sitemap.xml, /.well-known/*, llms.txt, the root favicon, and similar. Reveals what an agent probes on its own initiative.

Filtered to user agent Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html). clear filters

By path

Each unsolicited path with its request count and how many distinct user agents hit it. Click a path to see the individual requests; click a user agent below to reverse-look-up everything that UA did.

PathRequestsDistinct UAs
/robots.txt 11 1

Requests (11 shown)

The Related trace column links a probe to a homepage trace from the same user agent and IP within 30 minutes (the same crawler that fetched a well-known file usually also loaded /). The offset shows how long before/after the probe that trace was minted.

TimestampPathUser Agent (click for reverse lookup)Related trace
2026-06-23 01:54:48.433 UTC /robots.txt Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
2026-06-22 22:33:51.100 UTC /robots.txt Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
2026-06-22 21:07:28.208 UTC /robots.txt Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
2026-06-22 18:33:27.074 UTC /robots.txt Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
2026-06-22 17:05:27.481 UTC /robots.txt Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
2026-06-22 15:48:29.895 UTC /robots.txt Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
2026-06-22 15:44:14.516 UTC /robots.txt Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
2026-06-22 14:40:38.509 UTC /robots.txt Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
2026-06-22 14:37:09.115 UTC /robots.txt Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
2026-06-22 13:07:30.117 UTC /robots.txt Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
2026-06-22 13:05:17.632 UTC /robots.txt Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

← back to the live tracer (mints a new trace)