MoonPay has launched PayBox, a payment vault that lets ChatGPT and Claude users authorize AI to buy crypto, swap tokens and bridge assets from within a conversation while keeping control of their funds. Users connect a crypto wallet and payment methods to ChatGPT or Claude, which prepare transactions such as token swaps, crosschain transfers and DeFi interactions using natural-language prompts. Users can approve each transaction with a passkey or set spending limits that allow the AI to execute certain actions automatically, according to MoonPay. MoonPay said PayBox uses multi-party computation and trusted execution environments to protect wallet keys, preventing either the AI assistant or MoonPay from independently accessing user funds. PayBox supports multiple blockchains and payment methods, including debit cards, bank accounts, Apple Pay and PayPal. PayBox also supports x402, an open payment protocol originally developed by Coinbase that enables AI agents to make internet-native payments. Contributed to the Linux Foundation in April 2026, the protocol is now governed as an open, vendor-neutral industry standard. In a June 3 report, blockchain analytics firm Chainalysis said agentic payments on Coinbase’s Base network surpassed 100 million transactions within roughly nine months.