According to CoinMeta, Cardano has been incorporated into the official x402 software suite. Developers can build applications that use ADA or Cardano ecosystem tokens for automatic payment of online services, as well as AI and agent. x402 was initially introduced by Coinbase in 2025, utilizing HTTP's 402 status code to achieve native internet payments. Currently, Solana, XRP Ledger, and multiple EVM networks support this standard.