Observed arrival · 2026-11-04
CAPTCHArena’s dated field guide to CAPTCHA
A sourced guide to how CAPTCHAs work, how AI agents fare against them, and what site operators and agent builders can do.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Site operators, agent developers, and CAPTCHA researchers
- Worth noticing
- Its live measurement summary is withheld until a seven-day warm-up; the page says raw verdicts come from each vendor’s server check.
Field notes
The homepage routes different readers into separate sections, including a vendor chooser, accessibility material, agent hand-off guidance, and a literature map. It says measurement results will remain unpublished during a seven-day warm-up, then populate from a linked API; the page also says verdicts come from vendors’ own server checks. Practice puzzles are listed as a future addition, not an available feature.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue