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AI agents gain wallets and escrow tools, but atomic settlement remains unsolved

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Four major infrastructure launches between June 8 and June 30 advanced the emerging machine economy, including MetaMask's agent-controlled self-custodial wallet, Coinbase's agent payment interface, the OKX.AI marketplace with on-chain reputation, and Kustodia's smart-contract escrow on Arbitrum. Together, these tools give AI agents the ability to hold funds, make payments, and transact with dispute resolution built in. Data from tracked x402 payment flows shows USDC dominates agent transactions, with median payments in the cents range, suggesting a real micro-economy is forming. However, a key gap remains: every current solution requires an intermediary to hold funds at some point during a transaction, creating potential security risks as pooled escrow contracts become high-value targets. The well-established hash-time-locked contract (HTLC) model, which enables trustless atomic swaps without any custodian, has yet to be adopted by any of June's launches.

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