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ERC-8004 Walkthrough: Register Your AI Agent On-Chain

AI-Blockchain
2026-05-19
Author:Shivank
ERC-8004 Walkthrough: Register Your AI Agent On-Chain

Build and register your AI agent on-chain with ERC-8004 in 8 steps: gas costs, L2 options, audit scope, and EU AI Act compliance checkpoints for 2026.

Frequently Asked Questions

Yes. ERC-8004 allows minimal registration with only a URI pointing to your agent card. You can register on a testnet first, validate your metadata format, then migrate to mainnet or an L2 like Base or Arbitrum when your agent is production-ready. MVP registration typically takes two to four weeks with an experienced partner.
Audit costs for an ERC-8004 compatible agent contract vary based on contract complexity, number of registry interactions, and whether the audit firm provides a follow-up re-audit after fixes. Typical scope covers the identity registration function, the agent card resolver, and any wallet or payment logic attached to the agent NFT. Contact Ancilar for a scoped estimate based on your specific registry implementation.
An on-chain AI agent registry under ERC-8004 is a set of three Ethereum-compatible smart contracts that assign each AI agent a permanent verifiable identity, record its reputation based on third-party feedback, and allow independent validators to verify its outputs. Each agent receives a unique ERC-721 token as its on-chain ID.
The registration transaction itself takes seconds on-chain. However, full production readiness including writing the agent card, setting up IPFS or on-chain metadata storage, testing on Sepolia testnet, and deploying to mainnet or an L2 typically takes four to eight weeks when working with an experienced Web3 development partner.
ERC-8004 on-chain registration supports EU AI Act transparency obligations by providing immutable, publicly verifiable records of agent identity, capabilities, and operator information. However, registration alone does not substitute for a full conformity assessment under EU AI Act Article 43 for high-risk AI systems. Operators should treat on-chain registration as one component of a broader compliance program.

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ERC-8004

AI Agents

On-Chain Registry

Agentic Web3

Ethereum

Agent Identity

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