x402 Paved the Payment Rails for AI Agents, But Nobody's Solved 'Should I Pay' Yet
In 2026, Google, Visa, Mastercard, and Ripple all plugged x402 into their own agent payment protocols, and the rails for AI agents to autonomously pay in USDC are basically laid down. But finished rails don’t mean finished commerce - agents will pay to get a task done, but they have no built-in sense of whether that payment is actually worth it. This post breaks down the three things still missing from the judgment layer.