Mastercard names UK first market for 'Proto' agentic AI sandbox as banks and retailers prepare for agent-driven commerce
Mastercard names UK first market for ‘Proto’ agentic AI sandbox as banks and retailers prepare for agent-driven commerce #
Mastercard has selected the United Kingdom as the launch market for Proto, a new sandbox environment designed to let banks and retailers test agentic artificial intelligence use cases before deploying them in live operations. The company disclosed the move as part of a broader set of AI commitments aimed at helping UK businesses prepare for a shift toward software agents that autonomously search, decide, and pay on customers’ behalf.
Proto, which will go live in the UK in August, is being added to Mastercard’s Agent Suite platform. The environment is intended to give retailers and their partners a controlled space to work through practical challenges in agentic commerce: verifying that products are visible and purchasable by AI agents, establishing payment flows that customers can trust, and testing dispute-resolution processes at scale.
Alongside the sandbox, Mastercard said it would introduce three purpose-built AI agents for UK retailers and banks. A shopping agent is designed to improve customer engagement, an onboarding agent aims to cut friction when banks bring new retailers onto their platforms, and a dispute agent is intended to make merchant-customer interactions more efficient when problems arise.
The company also unveiled Mastercard Virtual C-Suite, an extension of Agent Suite aimed at smaller businesses. With SMEs accounting for 99.9 percent of UK companies, Mastercard said the offering is designed to extend AI-enabled capabilities to organisations that lack the specialist teams or resources of larger enterprises.
Mastercard cited several characteristics that made the UK its preferred proving ground: a digitally literate consumer base, a well-developed retail sector, deep payments expertise, and one of the world’s most active fintech ecosystems. The company also said the choice aligns with the UK government’s stated ambitions for agentic commerce.
The announcement is part of a sustained push by Mastercard to build infrastructure for AI agent-driven payments. The company launched Agent Pay in April 2025 and has since worked with partners including Google, OpenAI, PayPal, and various banks to develop protocols governing how agents are verified, credentialled, and permitted to transact across its network.
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