AI agent frameworks — LangChain, AutoGen, OpenClaw — have gotten incredibly powerful. Agents can search the web, execute code, manage files, and call APIs. But ask an agent to buy something, and it hits a wall. Why? Every payment infrastructure in existence assumes a human is behind a browser. Stripe's checkout flow renders a card input form. 3D Secure redirects to an authentication page. Someone clicks "Pay." An AI agent can't open a browser. Can't fill in a card form. Can't click buttons. "Just call Stripe's server-to-server API directly," you might say. Technically, yes. But before you do, you need to answer three questions: Authentication: Is this API call actually from a legitimate agent, or a compromised one? Authorization: Should this agent be allowed to spend $500? What's its limit? Which categories? Audit: Can we prove, in a tamper-evident way, what this agent has spent and when? AgentTrust solves all three. It's an open-source SDK that gives AI agents the ability to authenticate with DIDs, receive scoped authorization tokens, execute payments through Stripe, and record every transaction in a hash chain audit trail.

I Built a Payment SDK for AI Agents

ask an agent to buy something, and it hits a wall. Why?

ask an agent to buy something, and it hits a wall. Why?