Tag Archive

Card Tokenization

How card tokenization works in programmatic payment flows — tokenized credentials, authentication scoping, replay protection, and Visa's approach to agent-native card payments.

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Visa Card-Based MPP Spec: Threat Model for Agent Payments

Visa's card-based MPP spec routes encrypted network tokens through HTTP 402 flows for AI agents. Technical breakdown of threat model, TAP identity, and SDK scope.

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Eight-step card charge flow diagram showing Client, Client Enabler, Server, and Server Enabler nodes with JWE encryption highlighted — illustrating the Visa card-based MPP credential exchange.

Web3 Builder9 min read

Visa Card-Based MPP Spec: Threat Model for Agent Payments

Visa's card-based MPP spec routes encrypted network tokens through HTTP 402 flows for AI agents. Technical breakdown of threat model, TAP identity, and SDK scope.

Marcus Bishop

Mar 28, 2026