The ERC-8004 protocol is set to create a trust layer for AI agent networks using ERC-721 NFTs and three registries focused on identity, reputation, and validation. Supported by Google, MetaMask, and Coinbase, the protocol aims to provide verifiable identities and performance records for autonomous agents. It introduces a decentralized business registration system and supports pluggable trust models, such as zkML and TEE, tailored to the risk level of tasks. Currently in draft form, ERC-8004 is expected to cultivate a new ecosystem of trust-related services.