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The Madison Avenue Field GuideA field guide to marketing & advertising, by Brandon Mina

GlossaryAI Search & EmergingTrusted Agent Protocol (TAP)

AI Search & Emerging

Trusted Agent Protocol (TAP)

Visa's 2025 protocol that lets approved AI agents sign their requests so merchants can tell legitimate shopping agents from malicious bots.

By Brandon MinaCEO, BrandPilot AIUpdated November 2026

Short answer

Trusted Agent Protocol (TAP) is Visa's 2025 protocol that lets approved AI agents cryptographically sign their requests to merchant websites. Merchants can then distinguish legitimate shopping agents acting for real consumers from malicious bots. It aims to support agent-driven commerce without forcing merchants to block all automated traffic.