WLFI releases AgentPay SDK, with USD1 becoming an economic operation layer specifically designed for autonomous AI systems.

According to Mars Finance, on March 20, World Liberty Financial (WLFI) officially released its AgentPay SDK—an open-source, self-custodied payment infrastructure for the AI Agent economy, built around the USD1 stablecoin. Key highlights include: • AI Agents can autonomously hold, transfer, and use USD1 for payments on EVM-compatible chains. • Fully self-custodied: Private keys always remain on the operator's local machine, with zero data access via WLFI. • Policy engine priority: Every transaction must pass a user-defined policy check, which cannot be bypassed. • Manual approval mechanism: Transactions exceeding thresholds are automatically paused, awaiting manual confirmation (end-to-end encryption). • Support for mainstream AI tools and agents: Claude Code, Codex, Cursor, Windsurf, Cline, Goose, OpenClaw, etc. • Built-in Bitrefill plugin: Agents can directly purchase gift cards, eSIMs, prepaid cards, etc. • Fully open-source (MIT license), zero platform fees. The official statement indicates that the AgentPay SDK represents USD1 no longer being just a traditional stablecoin, but an economic operation layer designed specifically for autonomous AI systems. The AgentPay SDK is defining the default payment paradigm for AI agent economies, enabling agents to achieve "machine-speed" financial operations under controllable and secure conditions.