Mastercard has unveiled a payments infrastructure that allows artificial intelligence agents to receive virtual credit cards and complete online purchases on behalf of cardholders — without asking users to approve each transaction. Once connected, the digital assistants can buy from any online retailer that accepts Mastercard, operating autonomously within limits set by the account holder.

The shift is structural: in an agentic checkout, the party initiating payment is software rather than a shopper, and the controls a person would normally exercise at the point of sale are instead defined in advance as account-level rules.

The initiative was developed in partnership with Alchemy, a San Francisco-based financial technology startup behind the AgentCard framework. Alchemy introduced AgentCard in March 2026 and announced a comparable integration with Visa three months later, in June. With the startup now plugged into both major card networks, the platform extends AI payment capabilities to the vast majority of credit cards in circulation.

Mastercard shares (MA) rose roughly 0.15% in trading, showing virtually no reaction to the announcement, according to a Barron's report. Alchemy, headquartered in San Francisco, remains privately held and has no public market listing.

How the System Works

Cardholders link their AI assistants to their Mastercard accounts through Alchemy's platform and configure personalized controls. These parameters include ceilings on transaction amounts, whitelists specifying approved merchants, and toggles that require manual approval before a purchase is finalized. In practice, cardholder-defined spending limits and merchant allowlists determine what an agent may buy, and from whom.

At the core of the framework are what Mastercard designates as “agentic tokens.” Banks generate these tokens, packaging the cardholder's authorization together with purchase data, which enables the network to confirm that agents operate within sanctioned boundaries.

Jorn Lambert, Mastercard's chief product officer, expressed confidence in the technology's trajectory. “We believe's not about if, it's about when and how quickly,” Lambert stated. “Nothing happens overnight.”

Competition Intensifies

Mastercard is not the only payments provider exploring AI-driven transaction systems. PayPal and Stripe are actively developing comparable infrastructures, while Visa, Mastercard, and American Express have each unveiled distinct frameworks and protocols supporting autonomous AI purchasing capabilities.

Mastercard has simultaneously expanded its technology-sector collaborations. Previous partnerships with Microsoft and IBM underscore the company's commitment to advancing agentic commerce, an emerging model in which AI software carries out purchasing tasks on users' behalf.

Consumer Confidence Remains the Challenge

Widespread adoption confronts a significant hurdle: user trust. Numerous consumers remain hesitant about entrusting payment credentials to AI agents, expressing concerns over potentially fraudulent or erroneous charges.

Brendan Coughlin, president of Citizens Financial Group, recognized the technology's potential while cautioning that “it is certainly not without its risks.”

The legal and regulatory landscape surrounding the technology also remains ambiguous. Outstanding questions persist over who is liable when an AI agent executes an unintended transaction, whether through a technical error or by exceeding established authorization parameters.

Banking industry leaders, Coughlin among them, maintain a measured outlook regarding the timeline for widespread transformation of payment ecosystems. For now, the technology's trajectory — a matter of “when and how quickly,” in Lambert's framing — runs through those unresolved questions of consumer trust and liability. Mastercard had not provided comment to Barron's inquiries at the time of reporting.