MoonPay has launched PayBox, a payment vault that allows users to execute crypto transactions and online purchases through conversations with ChatGPT and Claude.
Users can connect PayBox to either AI platform through a custom connector and describe transactions using natural language. The assistant then researches and prepares the transaction before executing it under permissions established by the user.
Supported actions include purchasing crypto with fiat, swapping tokens, bridging assets between networks, depositing funds into decentralized finance protocols, booking flights and making restaurant reservations.
Users can choose between two permission models. Always Ask requires passkey approval for every transaction, while Autonomous allows the AI assistant to operate within spending limits and rules selected by the user.
Changing those permissions requires a new passkey authorization. Each approval is limited to one specific action and expires after it is used, preventing the authorization from being reused for another transaction.
PayBox supports Solana alongside EVM compatible networks including Ethereum, Hyperliquid, Tempo, Base, Robinhood Chain, Arbitrum and Polygon.
The vault also integrates with x402, an open payment standard that allows AI agents to pay services capable of accepting agent initiated transactions. MoonPay said initial integrations support travel bookings, restaurant reservations and purchases from major online retailers.
PayBox can work with both crypto wallets and payment cards. Wallet keys are divided through multiparty computation and stored across secure hardware environments, meaning neither MoonPay nor the AI assistant can independently access the complete private key or authorize transactions.
Card transactions use Visa’s agentic commerce protocol, which allows the AI to complete payments without accessing or storing the underlying card number.
The security infrastructure is based on technology developed by Sodot, a key management company acquired by MoonPay earlier this year. MoonPay said Sodot’s infrastructure secures more than $50 billion in assets and over 10 million wallets.
MoonPay describes PayBox as noncustodial because users maintain control of their assets and neither the company nor the connected AI assistant can unilaterally move funds. The product is now live through the PayBox website.