Building safe Payment Infrastructure for the autonomous economy — Steve Kaliski, Stripe

This talk addresses the challenge of enabling AI agents to spend money autonomously and safely. Steve Kaliski from Stripe presents a framework for separating non-deterministic discovery from deterministic transactions. He introduces three key components of Stripe's solution: Shared Payment Tokens for secure credential sharing with enforced spending limits, the Machine Payments Protocol for paying for API tool calls, and the Agent to Commerce Protocol (ACP) for structured, API-driven e-commerce checkouts. Through code examples, the talk demonstrates how these primitives create a secure and auditable payment infrastructure for the emerging autonomous economy.