Ethereum is emerging as the primary blockchain for AI agents, providing essential financial infrastructure without human identity requirements. In early 2026, an AI agent named Felix generated over $300,000 in revenue, showcasing the potential of autonomous agents in business operations. Ethereum's DeFi ecosystem offers these agents the ability to manage funds, borrow capital, and invest without traditional financial barriers. The x402 protocol has processed over 140 million transactions, highlighting the growing role of crypto-native payments for AI agents. Ethereum's DeFi protocols, such as Aave and Uniswap, provide the necessary liquidity and security for agents to operate autonomously. As AI agents become more prevalent, Ethereum's role as a financial system for these entities is expected to expand, driving demand for ETH through transaction fees and collateral requirements.