Amex lets cardholders cap what an AI agent can spend before it shops

American Express has announced a framework that lets cardholders set spending limits for AI agents at the card-network level, before any transaction reaches a merchant. The limit travels with the card itself. That means a cardholder can grant an agent a specific budget and category scope, and the network enforces those constraints without relying on the agent's own software to respect them. The structural shift here is that enforcement moves from the product interface to the financial infrastructure. A cardholder no longer has to trust that an agent will check before it spends. The card network checks instead. If the transaction falls outside the granted scope, it declines before it settles. For teams building products where an AI buys things on a customer's behalf, this changes the design conversation. Budget and scope are no longer values you configure inside your agent's instructions. They become verifiable facts the card network holds. A product team can build a spending UI knowing the floor is solid, and a cardholder can delegate purchasing tasks with a narrower set of things to worry about.