Check any AI agent's identity
Type an identifier. Any identifier — yours, someone else's, or one you have just invented. The answer comes from Ethereum, not from us.
Try: · ·
Now the part that surprises people
Say you have done everything right. You control the DNS for a domain, you registered it, and your agent is anchored on Ethereum. Its identity document is public — that is deliberate, so anyone can check it without asking permission.
So fetch one. This is a real, valid, in-good-standing agent, and its document is served to anybody who asks:
—
This is what came back. Genuine, current, and yours to keep:
Now use it. Present that document to a verifier, exactly as the agent would.
The document was real. The registry confirmed it. What you do not have is the domain's private key — and every request has to be signed with it, over that specific request, valid for sixty seconds.
DNS control gets you a registered root. A registered root gets you a public identity. Neither is enough on its own: without the key, a perfect copy of a perfect credential opens nothing.
What the key actually is
Controlling the DNS means you can add records to the domain — which in practice means you own it, or someone gave you the keys to it. That is what proves the domain is yours when you register: you publish a record we specify, and Ethereum records the result.
The domain's key is a file you generate at registration and keep. Not a password on our servers — we never see it, and we cannot reissue it. Your agent loads it when it starts, and signs each outbound request with it. If you lose it, you lose the ability to prove ownership of that domain's agents; if someone steals it, they can impersonate them.
That is the trade. There is no account to compromise on our side, because there is no account. The cost is that the file is genuinely yours to look after.
Two very different checks, one proof
A person reads the domain and already knows what to do with it. They either trust that company or they don't — a judgement they have been making for years.
Another agent makes the same check in milliseconds, no account and no API key, by reading the registry directly.
Both are satisfied by the same proof. That is the part nothing else does: a credential a machine can verify usually means nothing to a human, and a name a human trusts is usually unverifiable by a machine.
Anchored on Ethereum mainnet in a contract with no proxy and no upgrade path. The standard is public, and verification is free for anyone, forever.