When AI agents start buying things, somebody has to settle the transaction. This week, the four largest card networks in the United States each made the same declaration: The Prompt Economy is their market, and they are building the rails for it.<\/p>\n
Mastercard Says Cards Will Prevail in an Agentic World<\/p>\n
In the Mastercard\u2019s Q2 2026 earnings review<\/a>, CFO Sachin Mehra said that the company is extending its trusted infrastructure to support a new era of AI-powered commerce, scaling Agent Pay through live agentic commerce transactions around the world. The review says Mastercard is working with more than 30 industry leaders on Agent Pay for Machines, which allows transactions to be permissioned, orchestrated and settled at machine speed across its network.<\/p>\n The review also said the planned acquisition of BVNK reinforces Mastercard\u2019s digital assets strategy, supporting customers across virtually every form of money. On the earnings call, CEO Michael Miebach made the competitive argument directly. \u201cWe expect cards will prevail in an agentic world,\u201d Miebach said, citing Mastercards\u2019 scale, data access and risk management capabilities.<\/p>\n The review highlighted Verifiable Intent, developed with Google as part of Agent Pay, which allows any party to challenge a transaction they did not authorize, with existing chargeback processes resolving disputes. \u201cThe rise of agentic commerce brings about an entirely new class of payment use cases,\u201d Miebach said. \u201cIt\u2019s early days, but engagement across the globe is energizing.\u201d<\/p>\n Visa Says Agentic Commerce Is a When, Not an If<\/p>\n Visa\u2019s fiscal Q3 2026 earnings release<\/a> says the company has deployed more than 150 AI-powered applications and is building a suite of products to make AI-initiated transactions secure and transparent, including Agent Score, Agent Directory, Token Assurance Framework and Visa Intelligent Commerce. The release says Visa announced new partnerships with OpenAI and Meta as part of its agentic commerce infrastructure buildout.<\/p>\n CEO Ryan McInerney told analysts the strategy is structural, not speculative. \u201cAgentic commerce is a when, not an if,\u201d McInerney said. \u201cWe\u2019re building the products, the services, the protocols, ensuring that the ecosystem has what it takes, and this will happen, and it will be a positive tailwind for Visa.\u201d<\/p>\n Visa\u2019s release also mentioned that AI has already delivered 80% more code commits and 65% faster feature development inside Visa\u2019s own operations, and that the company is directing investment from a recent workforce restructuring directly into stablecoin infrastructure and AI development.<\/p>\n American Express Says the Closed Loop Is the Competitive Edge<\/p>\n During the American Express\u2019s Q2 2026 earnings release<\/a> CEO Stephen Squeri told analysts that Amex\u2019s closed-loop network gives it a structural advantage in agentic commerce that open-loop networks cannot easily replicate. \u201cOur closed-loop system provides a significant advantage in agentic commerce by offering better fraud protection and data insights, which enhances trust and security for our customers,\u201d Squeri said.<\/p>\n Their earnings release said that Amex has used AI in credit, risk and fraud for 15 to 16 years and is now deploying it to improve how unstructured data feeds into those decisions. AI is reducing coding cycle times by 30% to 40% across the technology organization. The company has also launched a servicing portal with embedded AI that reduces handle times for customer service representatives.<\/p>\n The release highlighted the Agentic Commerce Experiences developer kit, which will allow businesses to integrate Amex payment technology into their own agentic experiences. The release frames the closed-loop architecture as Amex\u2019s answer to the trust and accountability question every agentic commerce deployment has to answer.<\/p>\n Capital One Says the Discover Network Is the Infrastructure Play<\/p>\n