Spamo, the form-spam bouncer with unusually honest signage

Field notes

Spamo presents a copy-paste integration rather than a backend library: one script tag and one form attribute are intended to be enough. Its filtering sequence combines browser-derived tokens with server-side checks, including a hidden random-name field and a signed timestamp. The page also gives concrete limits: a token may be reused during its 12-hour life, and the service deliberately avoids IP reputation, email deliverability checks, and CAPTCHA.