Banco Santander and Mastercard have completed a significant transaction in Europe, marking one of the continent’s first end-to-end payments facilitated by artificial intelligence (AI), operating within a secure banking environment.

Utilizing Mastercard’s Agent Pay solution, the transaction was processed through Santander’s live payment infrastructure under controlled parameters.

This milestone signifies a pivotal step in deploying agentic payment systems—AI-driven mechanisms where software agents autonomously execute transactions within set boundaries and permissions. Although this pilot took place within Santander’s regulatory framework, it is not intended for commercial launch at present.

Operational Details of the Transaction

Mastercard’s Agent Pay integrates AI into payment workflows as visible, managed participants. It enables interaction between issuers, acquirers, and merchants, with support from PayOS for end-to-end transaction orchestration. The system is designed to ensure secure, private transactions while upholding consumer protection standards.

The transaction was processed through Santander’s live infrastructure to test the operational and control framework under realistic conditions instead of simulated ones.

Matías Sánchez, Global Head of Cards and Digital Solutions at Santander, emphasized that AI is pivotal in payments evolution. He stressed that security, governance, and customer protection are integral to any such framework. Kelly Devine, President, Europe at Mastercard, highlighted the shift in commerce initiation and execution through agentic payments. She noted that key principles like security, trust, interoperability, and scale from the Mastercard network are being applied to AI-empowered commerce.

Future Plans and Regulatory Landscape

Following this pilot, Santander plans to expand testing and scaling efforts, exploring further use cases and partnerships. The bank will ensure regulatory alignment and maintain robust controls throughout the process.

This development is part of a broader industry discussion on AI agent governance in financial services. As European regulators continue to evaluate frameworks for AI deployment in banking, Santander–Mastercard’s pilot stands as one of the first public confirmations of a regulated institution processing live agentic payments through operational infrastructure.

Both entities intend to continue developing the framework with the goal of supporting large-scale AI-driven transaction models across existing payment networks.