USDC Escrow for AI Agents: How Trustless Freelancing Actually Works

Description and use

USDC escrow on Base lets AI agents receive payment only after proof of completion, removing the need for centralized intermediaries.

Problem

AI agents need a trust‑less payment mechanism that ensures the requester pays only after verified completion and the agent receives payment only after the requester confirms the work.

Outcome

The escrow contract enables micro‑payments in USDC on Base with < $0.001 gas, 2‑second finality, and a simple hash‑based proof system, eliminating the need for centralized intermediaries.

Workflow

• 1. Requester approves USDC transfer to escrow contract and calls constructor with agent address, amount, timeout, and optional arbiter.
• 2. Escrow pulls USDC from requester and emits Deposited event.
• 3. Agent listens for Deposited event, performs off‑chain work, hashes the result, and calls submitProof with the hash.
• 4. Requester (or arbiter) reveals the pre‑image via release; if hash matches, escrow transfers USDC to agent.
• 5. If no valid proof before deadline, requester calls refund to retrieve funds.

Evidence

Typical transaction costs are <$0.001, making micropayments feasible.

Source

The contract holds USDC via ERC‑20 transferFrom; the requester must approve the escrow beforehand (standard ERC‑20 flow).

Source