Key Highlights
- World Liberty Financial (WLFI) has officially launched AgentPay SDK, an open-source payment toolkit designed for AI agents operating on EVM-compatible blockchains.
- The SDK combines self-custody key management with granular, policy-based transaction approval — enabling AI systems to hold funds and settle transactions autonomously.
- USD1, WLFI’s dollar-pegged stablecoin with $2 billion in circulation, is positioned as the core settlement asset for machine-to-machine commerce.
World Liberty Financial announced the AgentPay SDK on March 20, 2026, via an article on X, describing it as “the economic operating layer for autonomous AI systems.”
The SDK is not a theoretical framework. allows autonomous AI systems to hold digital assets, execute financial transactions, and settle payments across any EVM-compatible blockchain. The announcement marks a tangible delivery on promises Co-Founder Zak Folkman made just eight days ago, when he teased that something transformative was in the pipeline for AI-powered payments.
The architecture is designed around a core principle: agents can transact, but humans control the rules. The policy engine lets operators set per-transaction limits and daily spending caps. Transactions below the threshold execute automatically. Transactions above it pause and wait for manual approval via the CLI. If a wallet is short on funds, the SDK stops, reports what’s needed, and generates a QR code for mobile top-up—rather than attempting a doomed transaction and wasting gas.
According to the official article, all signing happens locally through Unix domain sockets. The private key never touches the agent, the skill pack, or any external service. WLFI emphasized repeatedly that zero data is sent to the company.
USD1 comes pre-configured on Ethereum and BSC at the same contract address on both chains, with support for additional EVM networks.
Why AI payment rails matter now
The SDK launch comes at a moment when the AI-agent-plus-payments intersection is attracting major infrastructure investment across the industry.
WLFI Co-Founder Zak Folkman teased the product last week, saying it would “completely change how people think about AI agents making autonomous payments.”
The broader context supports the urgency: Circle is building blockchain infrastructure and nanopayment features for agent-based transactions. Stripe is developing a blockchain called Tempo for stablecoin payments. Coinbase has incubated the open standard x402 for agent-based payments. Shopify has integrated stablecoin payments. OpenAI hired the creator of the autonomous agent framework OpenClaw.
The argument WLFI makes is that as AI systems move from generating text and code to completing actual workflows—purchasing services, paying contractors, settling API fees—the payment layer can no longer be bolted on after the fact. It needs to be native to the agent’s execution environment.
The Winklevoss twins at Gemini articulated a similar view in their shareholder letter this week, noting that AI is “money for machines” and announcing the addition of Model Context Protocol (MCP) as a fourth API interface designed specifically for AI agents. WLFI’s AgentPay SDK is the most concrete product shipped to date in this emerging category.
The USD1 context: Fifth-largest stablecoin with political baggage
USD1’s rapid growth provides the commercial foundation for the SDK. Launched in March 2025, the stablecoin has grown to over $3.3 billion in circulation within its first year, making it the fifth-largest dollar-backed stablecoin. It is backed by cash, short-term U.S. Treasuries, and dollar deposits, with reserves custodied by BitGo.
The stablecoin received a major boost when Abu Dhabi-based fund MGX used USD1 for a $2 billion investment into Binance. Binance subsequently holds approximately 87% of USD1’s total supply — a concentration that has drawn scrutiny from regulators and analysts. WLFI has also applied for a national trust bank charter with the OCC to bring issuance, custody, and conversion in-house.
The political dimension remains unavoidable. President Donald Trump is listed as a co-founder of WLFI alongside his sons Eric, Barron, and Donald Trump Jr. A Trump-linked LLC owns 38% of the company and holds 22.5 billion WLFI tokens. Some lawmakers have raised conflict-of-interest concerns, particularly following Trump’s pardon of Binance co-founder Changpeng Zhao. The federal government has probed whether a $500 million investment from a UAE royal family member affected U.S. policy.
None of this changes what the SDK technically does. But it shapes the trust environment in which developers and institutions will decide whether to adopt it.
What the SDK can actually do
The practical feature set is extensive for a launch-day product:
The SDK supports all EVM chains, with USD1 pre-configured on Ethereum and BSC. It includes 40+ CLI commands spanning wallet management, token transfers, policy editing, chain switching, RPC queries, relay configuration, and backup and recovery. The built-in Bitrefill integration lets agents purchase gift cards, eSIMs, and prepaid products across 12 EVM payment methods without leaving the terminal.
The AI tool integrations auto-detect and install into Claude Code, Codex, Cursor, Windsurf, Cline, Goose, and OpenClaw. Workspace adapters ship for AGENTS.md, CLAUDE.md, GEMINI.md, and Copilot instructions—meaning any agent that can read a skill file can use the SDK.
The system is entirely open-source, with documentation and the full codebase available on GitHub.
What comes next
WLFI outlined a roadmap that extends the SDK’s capabilities significantly. The next major milestone is EIP-3009 implementation—gasless meta-transactions that would let agents transact without needing native gas tokens for fees. This is a critical primitive for making autonomous payment flows practical at scale.
The company is also pursuing an EIP proposal for policy-aware agent interfaces, a white paper on AI agent payment security, a plugin ecosystem for third-party extensions, and broader expansion into cross-border payments, FX, remittance, institutional settlement, and DeFi protocol integrations.
The stablecoin market has swelled to nearly $315 billion, with U.S. Treasury Secretary Scott Bessent projecting global stablecoin adoption reaching $3 trillion by 2030 and Citi analysts forecasting $4 trillion. If AI agents become a meaningful share of transaction volume, the stablecoin that becomes their default settlement asset captures an outsized share of that growth.
That is the bet WLFI is making with the AgentPay SDK — and it is now live for anyone to test.
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