What Is Visa TAP?
Visa TAP (Trusted Agent Protocol) is Visa's card-network protocol for agent-mediated transactions. It defines how AI agents can authorise transactions on behalf of Visa cardholders within issuer-defined and user-defined constraints, with the resulting transactions carrying agent-context metadata that lets merchants, issuers, and Visa itself recognise and handle the agent-mediated case appropriately.
Visa announced TAP in late 2025 and progressed through pilots into early 2026. As of April 2026, TAP is in production with a select set of issuers and agent platforms, with broader rollout scheduled through the back half of 2026. It is the card-network counterpart to Mastercard's Agent Pay, and the two protocols together represent the card networks' coordinated response to the agent commerce era.
Why Visa TAP Matters
Card networks face a structural challenge in agent commerce: their existing fraud and authorisation models assume human-driven transactions. Agents can transact at much higher velocity and lower per-transaction value than humans, which inverts the economics that fraud screens were designed for. Without a protocol designed for agent-mediated traffic, card-network rails face a binary choice between blocking agent transactions wholesale (losing the volume) or letting them through ungoverned (taking on fraud risk).
TAP creates a third option. Agent-mediated transactions carry trusted credentials that distinguish them from anonymous bot traffic. Issuers can apply different fraud heuristics to TAP-attested transactions. Merchants can recognise agent context and handle pricing, refunds, and disputes accordingly. The card network gets to keep agent volume on its rails rather than ceding it to crypto or account-to-account alternatives.
How Visa TAP Works
An agent registered under TAP holds credentials tied to a specific cardholder and a specific set of constraints (typical of issuer-defined limits like spending caps, merchant categories, and geographic scope). When the agent initiates a transaction, the credentials are presented alongside the standard card data. Visa's processing layer recognises the TAP credentials, evaluates the transaction against the constraints, and routes it for authorisation with agent-context metadata attached.
The merchant sees a card transaction with additional fields indicating that the buyer is an agent operating under TAP. The merchant can choose to accept, reject, or apply different handling (different pricing tier, agent-specific fraud screen). The cardholder receives an audit-trail entry covering every TAP transaction, which surfaces in their statement and digital wallet.
In Practice
As of April 2026, TAP is being piloted by a handful of issuers (Chase, Capital One, and several international banks) and a small number of agent platforms. The general rollout is expected to broaden through late 2026 and 2027. Merchants do not need to do anything special to accept TAP transactions, but they can opt into TAP-specific handling to differentiate the agent-mediated case.
For publishers and brands, TAP matters because it is the most credible card-rail path for agent-mediated content monetization payments. A user authorising an AI agent to subscribe to a publisher's premium content, or to license content for use in a custom workflow, can do so through TAP-credentialed authorisation. The transaction settles on the same card rails as ordinary commerce, with the operational benefit of being recognisable as agent-mediated for downstream reporting.
Commonly Confused With
TAP is not a payment rail. It is a protocol layer on top of Visa's existing card network rails. TAP is also not the same as Mastercard Agent Pay despite serving the same purpose: the two are competing protocols, and merchants accepting both card networks need to handle both. AP2 sits above both TAP and Agent Pay as a cross-rail protocol that can express agent payment intent in a network-agnostic way.
