reCAPTCHA v2 vs v3 vs Enterprise — how to tell which one you're fighting "reCAPTCHA is blocking me" is the start of a debugging session, not the end of one. There are four practical variants — v2 checkbox , v2 invisible , v3 score , and Enterprise — and they behave completely differently. They fail differently, they're solved differently, and the call you make to a solver isn't the same shape. So before you touch any code, the first job is identifying which one you're up against. The pa...