Terms of Use for this interface

No operator designated yet.No operating entity has been designated for this interface yet. This document is in force; the gap is published rather than filled with a placeholder.

These terms cover callhouse.finance and app.callhouse.finance (together, “the interface”). Using either domain is use under these terms. If you do not agree with them, do not use the interface. The smart contracts the interface points at are on a public chain and are not governed by these terms; nothing here can change what they do.

Who may use this

This interface is not available to US persons.The same perimeter applies as to the underlying Stock Tokens. If you are a US person, or you are accessing this from a jurisdiction where these instruments are not offered, do not use this interface.

Callhouse is not available to US persons, and nothing on this site is an offer or solicitation to any person in any jurisdiction where such an offer would be unlawful.
Robinhood Chain Stock Tokens are offered outside the United States under their issuer's own terms and eligibility rules. Those rules govern whether you may hold the collateral at all; this interface does not widen them and cannot waive them.
Access is restricted by these terms, not by a technical control. You are responsible for your own eligibility, and for any tax or reporting consequence of using this interface.
No know-your-customer process is run here, and none is implied. This is a permissionless smart contract on a public chain.

You must be at least 18 years old and able to enter a binding agreement, and you must not be barred from using the interface by sanctions or by the law of your jurisdiction. By using the interface you represent that both are true.

What this interface is

A front-end to public smart contracts on Robinhood Chain. It builds transactions; your wallet signs them; the chain executes them. The interface never holds a key and never holds a token.
There is no custody. NVDA Stock Tokens you deposit are held by the vault contract and, during a written week, by the Valorem clearinghouse. The vault has no upgrade path and no function that moves a depositor's tokens anywhere but back to the depositor or into the written call; the Admin Safe can change policy inside compiled-in caps and cannot move a token.
There is no account. Nothing is registered, no password exists, and no know-your-customer check is run. Your wallet address is the only identity the interface sees, and it is public chain data.
The same contracts are reachable without this interface, from any tool that can send a transaction. Withdrawing does not depend on this site staying up.

Acceptable use

Use the interface only for lawful purposes, in your jurisdiction and in general.
Do not attack or interfere with the interface: no exploiting a weakness to take what is not yours, no disruptive automation, no impersonation. If you find a vulnerability, report it instead of using it.
Do not misrepresent this interface as affiliated with Robinhood, Overcall, Valorem or any other third party it names. It is not; the legal page says so in full.

No advice, no offer

Nothing on the interface is investment, legal, tax or accounting advice, and nothing here is an offer of securities or an invitation to buy or sell anything. Published weekly results describe what has already happened and say nothing about what any future week will do. The interface does not know your circumstances and does not try to.

Risks

Premium is paid only if a buyer fills the weekly listing; a week with no buyer pays nothing. Assignment can take the collateral at the strike. The collateral is a debt security whose issuer can freeze transfers, and the vault cannot override that. You can lose the collateral you deposit. The risks page is the full list and is part of these terms by reference; read it before depositing.

Smart-contract and third-party risk

The Callhouse contracts have not been audited. They are published under the MIT licence, as-is, and there is no upgrade path: a bug means a new vault and a migration, not a patch.
Overcall, Valorem Clear, Seaport, the NVDA Stock Token, USDG and the RPC providers are third parties. None of them is operated by, or answerable to, the people who publish this interface. Their contracts can be paused or upgraded by their own admin keys. The Stock Token issuer can freeze transfers, which can stop this vault writing, settling and paying out tokens; it can also pause its oracle, which stops the vault writing and listing new calls but not settling, because settlement does not read the oracle. When a dependency the vault needs stops, that part of the vault stops with it.
The weekly cycle is set by a third-party registry key. A hostile or mistaken cycle is bounded by the vault's compiled-in checks to a skipped week, and no better than that.

No warranty

The interface and the contracts it points at are provided as-is and as-available, with no warranty of any kind, express or implied, including of merchantability, fitness for a purpose, accuracy, or uninterrupted operation. Figures shown on app.callhouse.finance are read from the chain or from an indexer and may lag or be wrong; the chain is the record, not the page.

Limitation of liability

To the extent the applicable law allows, the people who publish this interface are not liable for any loss arising from its use or from the contracts it points at, including lost collateral, lost premium, assignment, a frozen token, a failed third party, an error on the page, or downtime. Where that exclusion is not permitted, liability is limited to the smallest amount the law allows. Nothing here excludes liability that cannot lawfully be excluded.

Indemnity

You indemnify the people who publish this interface against any claim, loss or expense brought by a third party that arises from your breach of these terms or your unlawful use of the interface, and you hold them harmless against it.

Intellectual property

The contracts the interface points at are published under the MIT licence. The text and design of this site are not open-licensed: you may read them and link to them, and no other right is granted. Nothing here gives you any right to the Callhouse name or mark, or to the names and marks of the third parties this site names, which belong to their owners.

Ending these terms

You stop being bound by stopping using the interface. The interface may be suspended, changed or withdrawn at any time, without notice. The contracts it points at are on a public chain and do not depend on this site: withdrawing from the vault remains possible without it, from any tool that can send a transaction.

Changes

These terms are versioned. The version in force is v2-2026-09-13. A change is a new version and a new date; there is no other notice. Continuing to use the interface after a change is use under the new version.

General

If a clause of these terms is unenforceable, the rest still apply.
A failure to enforce a clause is not a waiver of it.
These terms, the privacy notice and the risks page are the whole agreement between you and the people who publish this interface about the interface.
You may not assign these terms. The operator may assign them to a successor operator of the interface, who will be named on this page.
There are no third-party beneficiaries to these terms.

Governing law

Governing law: not yet designated. No law and no forum have been chosen for these terms. That is a decision counsel has not yet made, and this page will say which when it has.

Contact

Operating entity: not yet designated. Notices about these terms go to legal@callhouse.finance.

The privacy notice is at /privacy, the perimeter and the legal form of the collateral are at /legal, and cNVDA itself lives at app.callhouse.finance.