Developer Builds Autonomous DeFi Agent Managing $20 in Live Crypto Markets

A software developer named Josh has deployed an AI agent called Henry that autonomously monitors $20 in real USDC funds across four DeFi lending protocols on the Base blockchain. The agent runs two loops: a 15-minute monitor that checks on-chain rates and a hourly work cycle that acts on flagged opportunities, having executed this routine over 1,494 times since June 29th. Henry is programmed to propose a rebalance only when the APY spread between its current position and a better alternative exceeds 2% and the 30-day extra yield outweighs estimated gas costs, with final approval required from Josh via Telegram. Despite never completing an actual rebalance due to spreads narrowing before approvals clear, the system has surfaced real bugs — including a logging error that falsely reported an executed transaction and a Telegram notification failure caused by emoji in JSON payloads. The project is presented as a practical architecture case study, emphasizing on-chain state verification over log-based assumptions as a core safety principle.