Mastercard has moved Agent Pay for Machines from a closed partner program to early developer access. Announced October 20 at the Cloudflare Connect conference, the opening gives outside developers their first chance to build against the card network's rails for autonomous software agents, with stablecoins on the menu alongside cards and bank accounts.
Highlights#
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What opened. Developers get the first version of buyer-side and seller-side APIs, a developer toolkit, a testing sandbox, and documentation. Mastercard frames it as a pilot phase, with the roadmap shaped by feedback before any wider commercial rollout.
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A deliberately mundane demo. An agent ran an ad campaign for a protein bar on behalf of a marketing agency, making nine separate payments to two merchants, AIsa and Cloudflare AI Gateway, all drawn from a single budget a human approved up front.
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Crypto infrastructure in the stack. The demo agent ran on x402, the open payment protocol Coinbase initiated. Coinbase Developer Platform funded the agent's wallet, Base handled onchain settlement, and BVNK settled both sides in fiat or stablecoins through Mastercard's Global Money Platform.
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How a payment works. A business assigns the agent a task and a spending limit. When a paid service answers with HTTP 402, the agent signs a payment voucher, a promise to pay within its approved limit. Vouchers are verified offchain and can be combined and redeemed later, a batch-settlement model Mastercard sums up as authorize once, transact many times, settle later.
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Built on pilots. End-to-end pilots ran with Cloudflare, Ant International, AIsa, Base, BVNK, Coinbase, and Hype before the opening.
Why it matters#
The first card network to give developers APIs for agent-to-agent payments just put a stablecoin settlement path and an offchain voucher model at the center of it. What is still missing: fees, dispute and chargeback rules, and a general availability date, all of which Mastercard has yet to disclose.