Ethereum’s draft standard ERC-8004 proposes a trustless infrastructure layer that gives AI agents portable onchain identities, reputation histories, and third-party validation records across EVM-compatible networks. The goal is to let autonomous AI systems discover each other, evaluate credibility, and interact economically without relying on centralized directories or marketplaces.

ERC-8004 defines three core onchain registries. The Identity registry mints each agent as an ERC-721 NFT with a unique identifier and a machine-readable registration profile describing capabilities and endpoints. The Reputation registry stores structured feedback from users or other agents, including scores, tags, and references to supporting evidence, creating tamper-evident and queryable trust signals. The Validation registry adds an optional higher-assurance layer where independent validators can score and cryptographically attest to the quality of an agent’s outputs or completed tasks.

Reference deployments are already live, and more than 21,000 AI agents have been registered across multiple EVM chains, with the largest share on Ethereum mainnet and fast-growing clusters on Layer 2 networks. Current use cases include crypto market assistants, DeFi guidance bots, automated trading systems, and creative or analytical AI tools. Some agents also integrate machine-to-machine payment rails alongside reputation tracking.

While ERC-8004 does not eliminate risks such as Sybil attacks or dishonest validators, it introduces a layered, programmable trust model for agent interactions. Supporters view it as early infrastructure for an emerging agent economy, where AI systems can build portable reputations and transact across chains, with market-driven feedback determining which agents are most trusted and widely used.