Cardano has been added to the official x402 software kit, giving developers the code needed to let an app or AI agent pay for an online service using $ADA or tokens issued on the network.
x402 turns the web’s largely unused “402 Payment Required” response into a checkout built directly into an internet request. A service sends back its price and payment instructions, the agent signs a payment and receives the requested data or computing power after the transaction is verified.
That means an agent preparing a report could buy a single dataset when it needs it, without a person opening an account, entering card details or paying for a monthly subscription.
Coinbase created x402 in 2025 before contributing it to a Linux Foundation-backed organization whose members include Visa, Mastercard, Stripe, Google and Amazon Web Services. Solana, the $XRP Ledger and several Ethereum-compatible networks already support the standard.
Cardano Foundation engineers began with a specification accepted in June, then built the client and server software needed to request payments alongside a so-called facilitator that verifies and submits them. The initial release supports TypeScript, with Python planned next.
The facilitator’s documentation says it completed a real transaction on Cardano’s pre-production network but has not yet been run on mainnet. Developers can begin integrating Cardano, but the release does not show agents already paying for commercial services with $ADA at scale.
Cardano is joining the same race as Solana and $XRP Ledger — of getting its assets installed wherever developers eventually choose to build machine payments.
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