Cardano has integrated the x402 protocol, turning the HTTP 402 status code into an automated payment mechanism for ADA and native network tokens. The Cardano Foundation developed a facilitator that verifies and forwards user-signed transactions without holding their private keys. A complete transaction was executed on the preprod network, but no mainnet usage has been announced yet. The protocol, launched by Coinbase in 2025 and now governed by the x402 Foundation backed by the Linux Foundation, charges no own commission, but blockchain fees remain the users’ responsibility. Cardano joins Solana, the XRP Ledger and several EVM-compatible networks in the race for automated payments aimed at AI agents.
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