MoonPay Launches PayBox for AI-Driven Crypto Transactions

MoonPay has introduced PayBox, a payment vault designed to let users of ChatGPT and Claude authorize cryptocurrency purchases, token swaps, and cross-chain transactions directly through AI-powered conversations. The product aims to streamline crypto payments and trading by integrating with popular AI assistants, while allowing users to maintain control over their funds throughout the process.

To use PayBox, individuals install the tool within ChatGPT or Claude, create an account, register a passkey, and connect a crypto wallet. Users can also add a payment card if they choose. Funding the vault is possible via an existing wallet or payment card, but only after MoonPay completes its identity verification process. According to the company, all wallet keys are protected using multi-party computation (MPC) and trusted execution environments (TEEs), with key shares distributed across hardware-isolated secure environments. This structure is intended to prevent any single device or party from moving funds independently.

AI Transaction Approval

Once PayBox is set up, users can prompt ChatGPT or Claude to prepare a transaction using natural language. The AI assistant generates the transaction details, but no funds move until the user approves the action with their registered passkey. For those seeking more automation, PayBox offers an autonomous mode, allowing the AI to execute transactions automatically within user-defined spending limits. Each passkey approval is valid for a single transaction, reducing the risk of unauthorized reuse if an approval is intercepted.

For card-based payments, PayBox uses Visa's agentic commerce protocol, which processes transactions without exposing or storing the underlying card number. Supported blockchains include Solana and Ethereum Virtual Machine (EVM)-compatible networks such as Ethereum, Base, Hyperliquid, Arbitrum, and Polygon. Payment options extend to debit cards, bank accounts, Apple Pay, and PayPal. MoonPay also provides a software development kit for developers who want to integrate PayBox into their own AI applications.

Protocol and Ecosystem Integration

PayBox supports x402, an open payment protocol initially developed by Coinbase to enable AI agents to make internet-native payments. The protocol was contributed to the Linux Foundation in April 2026 and is now governed as a vendor-neutral industry standard, with backing from over 20 organizations including AWS, Cloudflare, Visa, Mastercard, Stripe, Shopify, and Anthropic. Current integrations for PayBox include restaurant reservations via AgentRes.dev, shopping through Purch.xyz, and flight bookings with BRIJ.fi.

According to blockchain analytics firm Chainalysis, agentic payments on Coinbase's Base network surpassed 100 million transactions within roughly nine months as of June 2026. The public dashboard for the x402 protocol reported more than 12.7 million transactions over the past 30 days across participating services at the time of writing. MoonPay's chief engineer has indicated that support for additional AI platforms beyond ChatGPT and Claude is expected within the next month, and the company plans to expand PayBox's capabilities to include token swaps, perpetual futures trading, and liquidity management in the same timeframe. PayBox is built on the key management infrastructure of Sodot, a company acquired by MoonPay earlier in 2026.

Security, User Impact, and Market Context

PayBox's design emphasizes user custody and transaction security, with MPC and TEE-based key management intended to reduce single points of failure. The system's autonomous mode introduces new convenience for users comfortable with AI-driven transactions, but also raises questions about spending controls and the risks of delegating transaction authority to AI agents. The integration of Visa's agentic commerce protocol for card payments is intended to minimize card data exposure, but users should remain aware of the broader risks associated with linking payment methods to AI-driven services.

For U.S. users, PayBox's compatibility with major blockchains and payment methods could make it a practical option for those seeking to interact with crypto markets through conversational AI. However, as with any new payment infrastructure, adoption will depend on user trust, regulatory clarity, and the demonstrated security of the underlying systems. MoonPay's expansion into AI-integrated payments reflects a broader trend of merging conversational interfaces with financial transactions, but the long-term impact on user behavior and market structure remains to be seen.

According to Chainalysis, the x402 protocol's rapid growth has been driven by integrations with consumer-facing services and AI agents, with over 100 million agentic payments processed on Base since September 2025. The protocol's adoption by major industry players and its transition to Linux Foundation governance signal growing institutional interest in standardizing AI-driven payment rails for both crypto and traditional payment methods.

AI-driven transaction approval introduces a new layer of convenience and automation for cryptocurrency users, but also creates fresh security and operational risks. While PayBox's use of MPC and TEE technology aims to mitigate key compromise and unauthorized fund movement, users must still exercise caution when delegating transaction authority to AI agents, especially in autonomous mode. Spending limits and single-use passkey approvals are designed to reduce risk, but the effectiveness of these controls will depend on user vigilance and the evolving threat landscape. As AI and crypto payment infrastructure continue to converge, the balance between convenience, security, and user control will remain a central issue for both developers and end users.