When AI agents roam the web, verification shifts from 'are you human' to 'who sent you'

chowxingshao · reddit · 2026-10-09

As AI agents browse, decide and act on users' behalf, the CAPTCHA-era question "are you human?" may give way to: are you an agent, who operates you, can you prove authorization, and can permissions be revoked? The author surveys existing building blocks (OAuth, DIDs, Verifiable Credentials) and asks whether the web needs a CAPTCHA-grade standard for verifying legitimate agents rather than blocking them.

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