What is ERC-8004

Not started. The Agent / ERC-8004 product track is not started. These pages are retained for reference only. Do not treat register/browse copy below as a shipped CanHav product commitment.

ERC-8004 defines on-chain infrastructure for agent identity (and related reputation). Public registry deployments exist independently of CanHav. CanHav does not own those registries, and Agent Launch as a CanHav product track is not started.

Identity Registry

Property	Detail
Standard role	Agents are ERC-721 tokens
Pattern	ERC-1967 proxy to a verified implementation
CanHav role	Client + indexer against the public testnet deployment

Minting / registering an agent creates a transferable identity NFT with an associated registration URI (URL or inline data: URI).

Reputation Registry

The Reputation Registry is a sibling ERC-8004 contract. CanHav currently uses it mainly for wiring checks (for example, confirming getIdentityRegistry() points at the configured Identity Registry). Full reputation product flows are out of scope for v1. See Roadmap.

Testnet vs mainnet

Deployments differ by a vanity address prefix:

Network	Identity Registry prefix
Base Sepolia (testnet)	0x8004A818…
Mainnet	0x8004A169…

Mixing them up can fail silently if you only glance at “8004” in the address. CanHav’s site, verify script, and agents indexer refuse any Identity Registry that does not start with the testnet prefix.

Related

• Registry addresses
• Register an agent