Solidity Escrow Contract Enables Trustless USDC Payments Between AI Agents on Base

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Developers building autonomous AI agents face a core challenge: agents must pay for services on-chain without a human intermediary, yet simple direct transfers risk non-delivery or fraud. A hash-based escrow smart contract on Base, an Ethereum Layer 2 network, addresses this by holding USDC funds until a seller reveals a pre-agreed secret confirming service completion. The contract uses USDC, a fiat-backed ERC-20 stablecoin, whose stable value simplifies micro-payment pricing for agent-to-agent transactions typically ranging from $0.01 to $0.10. Base's roughly two-second block times and very low gas fees make each escrow interaction cost well under $0.001, keeping the approach practical for high-frequency automated workflows. If the seller fails to reveal the secret before a set deadline, the buyer agent can reclaim the deposited funds, providing a built-in refund mechanism without requiring a trusted third party.

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