Ethereum's ERC-8004 Standard Enables AI Agents to Interact Without Gatekeepers

ERC-8004 Mainnet Launch Targets Thursday

Ethereum is preparing to deploy ERC-8004, an Ethereum AI agent standard designed to enable trustless communication between AI agents across the blockchain 1

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. Marco De Rossi, head of AI at MetaMask, announced on a developer Telegram channel Monday that development has been "frozen" and the protocol will "probably" go live on mainnet midweek, targeting Thursday around 9 AM ET 1

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. The official Ethereum X account confirmed Tuesday that ERC-8004 is launching "soon," explaining that "by enabling discovery and portable reputation, ERC-8004 allows AI agents to interact across organizations, ensuring credibility travels everywhere" 1

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Shared Framework for AI Agents Addresses Discovery and Trust

ERC-8004 proposes a shared framework for AI agents to prove identity claims, accumulate reputation, and request validation using Ethereum as a neutral coordination layer for AI services 2

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. The standard tackles two fundamental challenges: how to find AI agents and how to determine which agents are reliable 1

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. While existing protocols like Model Context Protocol and Agent2Agent handle agent communication and task orchestration, they don't address discovery or trust in untrusted settings 1

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. The proposal defines three lightweight on-chain registries covering identity, reputation, and validation 2

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Three-Layer Architecture Built on ERC-721 Identity

The identity component treats AI agents as ERC-721 identities, where each agent receives representation through a token ID in a registry 2

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. Metadata points to an "agentURI" describing services, endpoints, and capabilities off-chain, making agents indexable in familiar Ethereum tooling and enabling portable identity across applications 2

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. The reputation layer standardizes how clients publish feedback about an agent and how others query it, creating portable trust signals reusable across marketplaces and platforms 2

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. The validation layer provides a hook for cases where reputation alone isn't sufficient, defining how agents request validation and receive responses from validators without mandating a single validation method 2

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Application-Layer Standard Requires No Protocol Changes

ERC-8004 is a draft application-layer standard, not an Ethereum protocol upgrade or hard fork 2

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. Developers can implement it in their smart contracts without requiring changes to Ethereum's consensus rules 1

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. The mainnet launch means ERC-8004 registry contracts will be deployed to Ethereum mainnet, addresses published for developer integration, and indexers will begin tracking agent identities and trust signals 2

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. The proposal lists required standards including EIP-155 for chain identifiers, EIP-712 for typed signatures, and EIP-1271 for smart contract signature verification 2

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Agentic AI Economy Without Centralized Gatekeepers

Davide Crapis, AI lead at the Ethereum Foundation, stated Tuesday that "Ethereum is in the unique position to be the platform that secures and settles AI-to-AI interactions" 1

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. The launch unlocks an agentic AI economy where AI services can interoperate without gatekeepers, transforming AI agents from isolated tools into economic actors 1

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. The standard will also work on Ethereum layer-2 Base, which uses x402, an open payment protocol developed by Coinbase introduced in May 2025 that enables instant stablecoin payments over HTTP for autonomous agent transactions 1

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. The author list includes Marco De Rossi and Davide Crapis alongside contributors with Google and Coinbase email addresses 2

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Trust and Interoperability for AI Agents at Scale

As AI agents move from experiments to systems handling payments, data access, and automated decision-making, existing trust models built for humans prove inadequate 2

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. Agent-to-agent interaction scales faster and routes around organizational boundaries, operating through APIs and wallets rather than traditional contracts 2

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. ERC-8004 positions blockchain as infrastructure for interoperability, offering a shared format for identity and trust signals while keeping most compute and interaction off-chain 2

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. The proposal acknowledges that reputation becomes vulnerable to low-quality inputs and Sybil activity when anyone can post feedback, explicitly warning that consumers should filter reputation sources rather than treating raw signals as authoritative 2

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