Terms of service

Chain Check reads publicly available state on the Base blockchain about one address and reports what it found. That means the code at the address, membership of the OFAC Specially Designated Nationals list of digital-currency addresses, whether a contract's source is published in a public verification index, whether the contract points at a replaceable implementation in a standard proxy slot, which privileged roles a token contract admits to having, and what a simulated transfer of that token actually delivers.

You pay in Ounie credits, per check, from the shared Ounie wallet on your ounie.com account — 5 credits for an address and 8 for a token contract, or the equivalent in USDC on the keyless x402 endpoint. There is no subscription and nothing renews.

A clear band means every signal that resolved looked ordinary. It does not mean an address is safe, that a token is sound, that a counterparty is honest, or that a transaction is lawful in your jurisdiction. Several things a reasonable person would want to know are not checked at all, and every response lists them explicitly — read that list before acting.

Three limits deserve naming outright, because they are the ones most easily misread:

• We never report the absence of privileged roles. We can show that a token has a pauser, a blacklister or a minter. We cannot show it has none, and we do not claim to.
• A proxy sweep that finds nothing is not proof of immutability. We read a set of standard implementation slots. A contract that keeps its pointer elsewhere would not appear in that sweep.
• Sanctions screening is an inference, not a determination. OFAC publishes no Base-specific tag, so a Base address is screened against the Ethereum-tagged SDN entries. Absence from the list is not a compliance clearance, and presence on it should be verified against OFAC's own search before you act. Sanctions compliance is your responsibility, and you should take advice.

Verified source means the published source compiles to the deployed bytecode. It says nothing whatsoever about whether that source is safe, and it is not an audit.

Every signal is read live from a public endpoint at the moment you ask. Chains reorganise, contracts are upgraded, lists are updated, and public infrastructure goes down. A result describes what we observed at one moment and does not describe the future.

Where we cannot read something, we say so — the signal comes back as insufficient with the reason, and it is excluded from the band rather than scored as a failure. We do not guarantee that any particular signal will resolve on any particular call.

Credits are reserved when a check starts and settled at the price of what was actually produced. If you ask for auto and the address turns out to be a plain wallet, you are billed the address price and the difference is returned to the pool it came from.

A check where the chain would not answer observed nothing, so it is refunded in full. On the keyless x402 rail there is no refund — an on-chain settlement is final — so that rail refuses before settling rather than after. A result you do not like is not a non-answer: a high band is the most valuable thing this service can tell you and is billed normally.

Reading, listing and re-reading checks you have already paid for is free, indefinitely.

Do not present a Chain Check result as a security audit, a sanctions-compliance determination, a legal opinion, or investment advice — including by quoting a band without the accompanying disclaimer and the list of what was not checked. Do not use the service to harass, profile or make automated adverse decisions about an identified individual.

Do not attempt to overwhelm the service or the public infrastructure it depends on. API keys are personal to your account; a key spends your credits and cannot overdraw them.

The service depends on public Base RPC endpoints, a public source verification index, and a public mirror of the OFAC SDN digital-currency address list. We do not control any of them, we do not warrant their accuracy, and their outages will show up as unresolved signals rather than as invented ones.

The service is provided as-is. To the fullest extent permitted by law, Ounie is not liable for any loss arising from a decision you made in reliance on a result — including any transfer of funds. The decision to send money to an address is yours, and this service is one input to it, not the decision itself.

Where liability cannot be excluded, it is limited to the credits you spent on the check in question.

These terms may change; the review date at the top will change with them. Questions go to the contact form, and billing lives on your Ounie account at ounie.com.