Coinbase for Agents connects AI agents to live financial execution, letting them trade, pay, and rebalance within user-defined limits straight from a portfolio. It offers a CLI path for dev tools like Claude Code and Codex and a Model Context Protocol path for web agents like ChatGPT and Claude, with agents confined to isolated portfolios and run through Know-Your-Transaction checks. It completes a stack that began with AgentKit (2024) and the x402 agent-payments protocol, turning LLMs from advisors into actors.