[MoonPay Launches AI Trading Agent with Ledger Signature Support] According to Golden Finance, on March 15, crypto payment service provider MoonPay announced the introduction of native hardware signature support for its AI agent tool, MoonPay Agents. Under the new architecture, the AI agent can execute trading strategies on major blockchains such as Ethereum and Solana. However, all transactions still require user confirmation via a Ledger device. When the agent identifies cross-chain arbitrage opportunities, it can request the user to sign off on bridging USDC from Ethereum to other networks to complete the operation, while the private key never leaves the hardware signature device.