According to CoinMeta, the Cardano Foundation announced that Cardano has now become an official part of x402 SDK, allowing applications and AI agents to use ADA and Cardano native tokens for payments. This move does not require an account, API keys, or a checkout page; any service on x402 can switch to Cardano. x402 is an open HTTP payment standard created by Coinbase and managed by the Linux Foundation, aimed at enabling applications and AI agents to make payments using stablecoins upon request.