The combination of ERC-8004 and x402 is becoming a key support for the agent technology stack in 2026, laying the foundation for the explosive growth of the decentralized AI agent economy. The logic is actually quite clear—ERC-8004 addresses identity issues, giving each agent a clear identity and traceable ownership; x402 is responsible for the payment layer, enabling on-demand settlement through micro-payment mechanisms. One manages identity, the other manages wallets. The integration of these two standards transforms agents from black boxes into independent economic units that are traceable, interactive, and settleable. The significance of this architectural design lies in its ability to turn technical challenges into executable standards, providing the necessary infrastructure support for large-scale agent applications.