HashKey CaaS has officially launched the HashKey Settlement Protocol (HSP), a pivotal development aimed at enabling the AI agent economy. Built on Google's AP2 technical specification, HSP offers a high-efficiency, low-cost payment and settlement standard for AI agents, cross-border e-commerce, and physical enterprises. This protocol addresses the limitations of traditional financial systems by allowing machines to hold assets, execute transactions, and conduct value exchanges autonomously. The HSP protocol facilitates native HTTP interactions and A2A (Agent-to-Agent) autonomous payments, enabling AI agents to perform automated settlements without human intervention. It supports micro cross-border settlements using stablecoins, ensuring compliance and security through licensed institution verification nodes and on-chain AML mechanisms. Initial applications include the eCandle Community Energy Program and Lingchu Intelligent Robots, showcasing HSP's potential in real-world infrastructure and AI economic agent development.