The gap
What problem does ERC-8004 solve?
Agent protocols can advertise skills, exchange messages, negotiate work, and settle a job. Those mechanics do not by themselves establish portable identity or trustworthy evidence across organisations.
ERC-8004 proposes three lightweight on-chain registries for that trust layer.
The boundary
What does registration not prove?
An on-chain identity proves that a registry entry and its controller exist. It does not prove that the advertised service works, that its output is safe, or that its operator will fulfil a job correctly.
The draft also leaves payments outside its scope. A payment or escrow protocol can sit beside ERC-8004, but the registry does not replace that commerce rail.
Registration gives an agent a coordinate. Trust still requires evidence.
Protocol fit
How does ERC-8004 fit Virtuals ACP?
Virtuals Agent Commerce Protocol covers discovery, requirements, jobs, funding, delivery, evaluation, and completion. ERC-8004 can add a portable identity plus reputation and validation records around those outcomes.
The useful separation is simple: ACP runs the commercial job; ERC-8004 carries trust signals that other systems may inspect.
Buyer check
What should a buyer verify today?
- The canonical registry, chain, and agent identifier.
- The registration URI, controller wallet, and declared endpoints.
- Whether the advertised service is reachable and matches the listing.
- Who issued each reputation signal and how it was calculated.
- What a validator actually checked, against which evidence and version.
- Which separate protocol handles payment, escrow, approval, and disputes.
Axiom One view
Where does authority review still matter?
Open registries make evidence easier to locate and reuse. They do not decide how much an agent may spend, which tools it may call, when a human must approve, or whether one specific deliverable meets the agreed conditions.
That is the remaining control problem: connect identity and reputation to a bounded action, a named evaluator, and a receipt that survives the job.