Mastercard Opens Agent Pay for Machines Early Access

Mastercard opened early access to Agent Pay for Machines on Oct. 20, letting developers test payments for artificial intelligence (AI) agents. The system supports purchases across providers within business-approved budgets, reducing the need for separate billing arrangements.

Mastercard Opens Developer Access After Payment Pilots

The program provides initial buyer- and seller-side application programming interfaces (APIs), a toolkit, documentation, and a sandbox for testing integrations. It follows pilots involving Coinbase, Base, Cloudflare, Ant International, AIsa, BVNK and marketing agency Hype.

At Cloudflare Connect, Mastercard demonstrated an agent preparing a sample campaign for a protein bar launch. Hype approved funding for the assignment before the agent purchased social media research from AIsa and eight campaign images from Cloudflare.

The demonstration involved nine payments to two merchants under one approved budget. Mastercard said the agent completed those purchases without separate merchant accounts, API keys or invoices for the services.

Coinbase and Base Supply Pilot Infrastructure

Coinbase Developer Platform provided the wallet infrastructure used to fund the agent, while Base supplied the on-chain settlement network. BVNK acted as the agent wallet, using Mastercard Global Money Platform for fiat or stablecoin payments and settlement.

The system builds on x402, an open payment-request protocol. A service signals that payment is required using a “402 Payment Required” response, after which the agent signs a payment voucher, a digital promise to pay within its approved limit.

The provider verifies the voucher before delivering the service. These interactions occur off-chain, and providers can combine vouchers for later redemption rather than settling every purchase individually.

Mastercard Builds on Its June Machine-Payments Introduction

Mastercard introduced Agent Pay for Machines on June 10 to support frequent, small automated transactions, including payments worth fractions of a cent. Its framework spans cards, bank accounts and stablecoins.

Mastercard distinguished the initiative from its broader Agent Pay program, introduced in 2025. While that program addresses how trusted agents participate in payments, the machine-focused service targets repeated transactions between software systems.

Mastercard said developers could test different use cases through early access. Their feedback would help shape further development.