Read this first

What you're actually buying

No marketing on this page. Every claim below can be checked on-chain.

There is no official naming system on this chain

Robinhood Chain's own documentation contains no naming service of any kind. .hood is one company's product — HD Protocol — and they state twice on their own site that they are not affiliated with Robinhood Markets. SIGIL is not their official interface either; we are a third-party front-end.

So "buying a domain on Robinhood Chain" really means: buying a name issued by HD Protocol's contracts. No authority on this chain backs it.

Owning a name ≠ being seen

This is the part people get wrong. Registering gives you an ERC-1155 NFT. For anyone to actually see it, three things have to be true:

1. You wired it up

Deploy the resolver → point it at your wallet → set it as your primary name

2. The other side's interface supports it

Wallets ship with ENS support. .hood needs each app to add it deliberately

3. That interface actually did

Today, essentially nobody has

Of the names registered on this chain, only a small fraction have ever set a primary name. The rest sit in wallets, invisible everywhere. That is why SIGIL walks you through all three wiring steps the moment you register.

Front-running is real here

Mature naming systems (ENS, for instance) make you commit a hash first and wait about a minute, so nobody can see which name you're about to take. This registrar has no such protection — MIN_COMMITMENT_AGE = 0, and registration completes in a single transaction.

In practice: in the seconds between signing and inclusion, someone watching the mempool can take the name first. No front-end can patch this. If you found a good name, sign it — don't sit on the price screen.

Pricing, expiry, transfers

Term

1 year minimum; multi-year is discounted

Price

Set on-chain by character count — 1 char 0.020 · 2 char 0.017 · 3 char 0.014 · 4+ char 0.012 ETH/year

Overpayment

Refunded automatically by the contract

Expiry

An expired name can be taken by anyone; the NFT disappears from your wallet

Transfers

Names are standard NFTs — tradeable on OpenSea. Records travel with the name on transfer

Transfers are irreversible. Send one to an address you don't control and it is gone.

Contracts — check them yourself

These are the addresses HD Protocol's own front-end calls, each verified with a live on-chain call. Worth knowing: their /docs/integrate page and their agent-facing llms.txt disagree with each other — the registrar in llms.txt has seen no activity for over a month. The one below is the live one.

RPC https://rpc.mainnet.chain.robinhood.com · chainId 4663 · no API key required.

What SIGIL does and doesn't do

Does

Read the chain, show the real state of every name, and run the wiring steps in one pass

Doesn't

Issue names, custody assets, hold keys, or run accounts of any kind

Money

Registration fees go straight to HD Protocol's beneficiary address. SIGIL takes nothing

Data

No backend database. Every number you see comes from chain events you can re-scan yourself

Risk

Buying a name is buying a promise: that other people will one day see it next to your wallet. Whether that promise is kept does not depend on how good the contracts are — it depends on how many third parties choose to support the namespace. That is business development, not code, and it is entirely outside SIGIL's control.

On-chain transactions cannot be reversed. Names expire. The contract owner can swap the pricing oracle and the registrar. Don't spend money you can't afford to lose.