Building payment-native AI agents with aixyz and x402

Everyone's building AI agents. But almost nobody's figured out how agents get paid. Think about it: you build a weather agent, a flight search agent, a code review agent. You want to expose it to other developers or other AI systems. What's the business model? API keys with monthly caps? Stripe subscriptions? Bearer tokens? These all require accounts, signups, billing infrastructure. They work fine for humans. They're terrible for agent-to-agent communication. The problem with paying for AI services today When an AI agent needs to call another service, it typically: Needs a pre-registered API key Pays in bulk (subscription or credits) Can't dynamically discover new services This works when a human sets everything up in advance. It breaks down when agents need to autonomously discover and pay for services on the fly. Imagine your orchestrator agent finds a better translation service mid-task — it can't just use it. Someone has to sign up, add a credit card, generate a key, and redeploy.