Mastercard has opened early access to its AI-powered payment system, allowing developers to build and test applications that let autonomous AI agents pay for digital services using approved budgets and spending limits.
The programme, called Agent Pay for Machines, follows pilot projects involving Coinbase, Base, Cloudflare, Ant International, BVNK and AIsa. Mastercard announced the early-access programme on October 20, making its initial buyer- and seller-side application programming interfaces (APIs), developer toolkit and testing sandbox available.
The system is designed to let AI agents purchase services such as market research, computing power, AI models and application programming interfaces without requiring a separate account, API key or billing arrangement for every provider.
Businesses can assign an agent a task and set a spending limit before it begins making purchases. When a service requires payment, the provider returns an HTTP 402 “Payment Required” response. The agent then generates a digitally signed payment voucher, which the provider verifies before delivering the service.
Mastercard said providers can collect and redeem these vouchers later, allowing agents to complete multiple transactions without requiring each payment to be settled immediately.
Coinbase and Base support blockchain payments
The system integrates Coinbase’s x402 payment protocol, which enables digital services to request payments from AI agents, alongside Mastercard’s payment infrastructure.
During a demonstration at Cloudflare Connect, marketing agency Hype assigned an AI agent to plan a sample campaign for a protein bar launch. The agent purchased social media research from AIsa and generated eight campaign images through Cloudflare AI Gateway, completing nine payments across the two providers within a single approved budget.
Coinbase Developer Platform provided the wallet infrastructure used to fund the agent, while Base handled onchain settlement. BVNK, the stablecoin infrastructure company acquired by Mastercard in August 2026, supported the wallet and payment settlement through Mastercard’s Global Money Platform, with transactions available in fiat currencies or stablecoins.
Mastercard first announced Agent Pay for Machines in June 2026, outlining support for card, bank account and stablecoin payments. The latest early-access programme allows developers to test the system and provide feedback before a wider rollout.
The launch reflects an emerging use case for blockchain-based payments: enabling AI agents to purchase digital services autonomously, including transactions that may be too small or frequent for conventional billing arrangements.
By combining programmable payment authorisation with blockchain settlement and established payment infrastructure, Mastercard is seeking to establish a system in which AI agents can transact independently while businesses retain control over their spending permissions and budgets.
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