World Liberty Fi, an emerging fintech entity focused on digital infrastructure, has launched the AgentPay SDK, an open-source toolkit designed to support AI agents that handle digital payments autonomously. The company aims to build foundational tools for autonomous systems through AgentPay SDK and its in-house stablecoin, USD1, both positioned as core infrastructure for agent-driven financial workflows. World Liberty Fi, often abbreviated as WLFI, specializes in programmable payment solutions and is actively developing interoperability features and security protocols for blockchain-based transactions.
Architecture Optimized For Local Security
AgentPay SDK operates fully on the user’s local machine, with zero data transmitted back to World Liberty Fi at any stage. This design ensures custody and private credentials remain with the operator, not third parties. The SDK is organized into four layers: a command-line interface, a local signing daemon, a policy engine for transaction approvals, and a “skill pack” that integrates with tools such as Claude Code and Codex. These modules automatically route payments to the appropriate EVM-compatible network without user intervention.
During any transaction, AgentPay’s policy engine verifies sufficient USD1 and native token balances are present to cover both value transfer and network fees. Transaction signing takes place in a local environment using Unix domain sockets, which means the private key never enters the agent, the skill pack, or external infrastructure. This setup addresses longstanding concerns in the crypto industry about security and on-chain automation.
Policy Engine And Approval Layer
The SDK’s policy engine enforces user-defined spending and transaction limits, checking both per-transaction and daily caps before permitting payments. AgentPay introduces a threshold-based approval system, which pauses and routes high-value transfers for manual operator confirmation. Approval can be granted with a single command, after which the transaction proceeds and is broadcast to the blockchain.
If a wallet lacks adequate funds, AgentPay returns a structured error describing the deficient assets, identifying the wallet and chain, and providing a QR code for easy funding. The aim is to create a seamless recovery path when payments cannot complete, improving operational reliability for autonomous agents.
USD1 is pre-configured on both Ethereum and BNB Smart Chain, with Bitrefill commerce available natively. As a result, agents can facilitate purchases of retail vouchers, eSIMs, and prepaid utilities without custom integration. The SDK covers wallet creation, chain management, and account recovery via over forty CLI commands.
World Liberty Fi describes AgentPay SDK as “Financial Infrastructure for the Agentic Economy,” arguing that AI-driven systems have lagged in direct payment capabilities. The SDK targets this gap by combining local signing, programmable policies, and direct integration for AI agents.
World Liberty Fi emphasized that AI agents are held back by their inability to securely transact, presenting AgentPay as a direct response through local signing, enforced policies, and agent-native workflows.
The project’s development trajectory features gasless meta-transactions through EIP-3009, which would remove the requirement for agents to possess native gas tokens. The roadmap also indicates an upcoming proposal for agent-aware policy interfaces, a formal white paper on agent payment security, and a plugin ecosystem enabling third-party extensions.
Future plans involve integrating cross-border payments, DeFi protocols, remittance, and institutional settlements, expanding the SDK’s utility far beyond basic on-chain transactions. The long-term ambition is positioning USD1 as a primary settlement mechanism for autonomous agent payments on public blockchains.
