CoinDesk
Mastercard unveiled Agent Pay for Machines (AP4M) on Tuesday, a platform that lets AI agents and software systems make automated payments across cards, bank accounts and stablecoins. The service authenticates agents, enforces spending limits and guarantees settlement through Mastercard's existing network. More than 30 companies joined at launch, including Coinbase, Stripe, Adyen, Checkout.com, Cloudflare, RippleX, Polygon Labs, Solana Foundation and OKX. Agent permissions and credentials will initially be recorded on the Polygon, Solana and Base blockchains, with broader access planned later this year.
Why it matters
The product reframes Mastercard's role from card-issuer to trust layer for machine-to-machine commerce. Raj Dhamodharan, Mastercard's executive vice president of blockchain and digital assets, framed the bet as a re-application of B2B and carded-world trust mechanisms — credentialing, permissioning, guaranteed settlement — to a new class of buyer. "There are already transactions happening," he told CoinDesk. "There are already many declines happening because there is no payment option available. That is a leading indicator in our view."
The reference point is HTTP 402, a long-dormant web standard now being revived precisely because no payment rail exists for automated calls. AP4M is Mastercard's attempt to fill that gap before a non-card network does.
Market impact
The coalition stack reads like a who's-who of the agentic-commerce thesis: traditional card-rails, crypto exchanges, stablecoin issuers and the three blockchains most likely to host agent identity and credentials. Polygon, Solana and Base — all low-fee, high-throughput chains — anchor the credentialing layer; Stripe, Coinbase and Ripple bring on- and off-ramp plumbing; OKX and Adyen plug in merchant coverage. By settling in stablecoins alongside cards and bank transfers, AP4M also gives Mastercard a defensive position if agent-driven volume migrates off card rails entirely.
Frequently asked questions
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What is Mastercard's Agent Pay for Machines?
Agent Pay for Machines (AP4M) is a Mastercard platform launched Tuesday that lets AI agents and software systems make automated payments across cards, bank accounts and stablecoins, with built-in authentication, spending limits and guaranteed settlement.
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Which companies joined Mastercard's Agent Pay at launch?
More than 30 companies joined the initiative, including Coinbase, Stripe, Adyen, Checkout.com, Cloudflare, RippleX, Polygon Labs, Solana Foundation and OKX. Agent permissions and credentials are initially recorded on the Polygon, Solana and Base blockchains.
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Why is Mastercard moving into agentic commerce now?
Mastercard EVP Raj Dhamodharan said automated transactions are already happening but frequently failing because no payment rail exists — pointing to activity around the HTTP 402 web standard as a leading indicator of demand.
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What role do blockchains play in Agent Pay?
Polygon, Solana and Base are used to record AI-agent permissions and credentials at launch. Mastercard said broader access is planned later this year, signalling on-chain identity as a core layer of the system.
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How does Agent Pay settle transactions?
AP4M settles payments across multiple methods — cards, bank accounts and stablecoins — with Mastercard's network guaranteeing settlement and enforcing spending rules on each transaction.
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