Enroll in the Mastercard Agent Pay for Machines (AP4M) protocol and issue Verifiable Intent credentials for your agent so it can transact across Mastercard's card and stablecoin rails

Steps

1. Register your agent with Mastercard Agent Pay by submitting agent identity and public key through the AP4M enrollment portal; credentials and spending permissions are recorded on public blockchains (Polygon, Solana, or Base) rather than a private Mastercard database.
2. Obtain Verifiable Intent credentials — programmable spending rules specifying per-transaction caps, merchant restrictions, and expiry windows; these are publicly auditable on the selected chain.
3. At transaction time, include the agent's AP4M Verifiable Intent credential in the authorization message; Mastercard-certified processors (including Coinbase, Adyen, and Stripe) validate the credential before routing to settlement.
4. Choose settlement currency: AP4M supports both traditional fiat (via Mastercard card rails) and stablecoins; for micropayments worth fractions of a cent, use the stablecoin path via one of the 31 launch partners.
5. To revoke an agent's authorization, update or remove its on-chain Verifiable Intent credential; the next authorization attempt will fail at the network level.