Terms of service

Last updated 1 September 2026. This date changes only when the words change.

These terms cover your use of Payaider as a merchant. They describe a non-custodial service, so they are as much about what we cannot do with your money as about what we can: the section on what this service cannot do is the one worth reading twice.

Who we are and what Payaider does

Payaider is a payment gateway for stablecoin payments. When a customer pays you through Payaider they send USDT or USDC from their own wallet straight to the payout wallet you registered, on the network they chose: Tron, BNB Smart Chain or Base. The transfer is between your customer and you, and we are not a party to it. What we do is watch those networks for the payment we told you to expect, match it to its invoice, and tell you with a webhook signed with your key.

We are non-custodial, and that is not a marketing word. We never take custody of your funds. We hold no private key for any wallet you list with us, and we cannot move, spend, hold, freeze or reverse anything in one. We are not a bank, an exchange, a custodian or a money transmitter, and nothing here makes us your agent for receiving money. If we shut down tomorrow the money in your wallet would still be yours and still be spendable, because it never passed through us.

In these terms "you" means the business holding the account and anyone using it on that business’s behalf; "we" and "Payaider" mean the operator named in the governing law section below.

Eligibility and business verification

Payaider is for businesses. To open an account you must be a business or acting for one, able to enter a contract where you are, and authorised to agree to these terms on that business’s behalf.

Test keys are issued at signup and move no money at all. Live keys are issued only after your business passes verification, which we call KYB: your registered name, number and address, the identity of your directors and beneficial owners, and documents supporting all of it. A person decides every submission; an automated check is evidence for that person and never the decision itself.

We may ask for more information at any time, including long after approval, and an account that does not answer can be suspended until it does. We may also decline an application without explaining in full, sometimes because the law forbids the explanation. A refusal means no live keys; it does not by itself remove your test keys or your access to the account.

What you agree to do

Keep your business information accurate. What you tell us at verification must be true when you tell it to us, and you must tell us promptly when it stops being true — a change of registered name or address, of ownership or control, of what you sell, or a new director or beneficial owner.

List only wallets you control, and prove them. Every payout wallet must pass an ownership check before it can receive anything: a message signed by the address, or a small transfer we ask you to make from it. Until it passes we will not route a payment to it. Do not list an address whose key you do not hold — an exchange deposit address, a shared address, someone else’s wallet — because you would be asking us to help you receive money for a third party, which is the activity we are not licensed to support.

Look after your keys. A live API key and a webhook signing secret are shown once and are yours to protect. Anything done with your key is done as you. If one is exposed, create a replacement in the portal and revoke the old one immediately, then tell us; and keep a second factor on every account that reaches the console.

Use the service lawfully, and stand behind your own sales. You are responsible for the laws that apply to your business: licensing, tax, consumer protection, advertising and sanctions among them. Your relationship with your customer is yours — delivery, refunds, warranties and disputes sit with you, and we cannot settle an argument between you and someone who paid you.

Prohibited use

You may not use Payaider, and we will act on any account that does, for:

• payments to or from a person, entity, wallet or country under sanctions that apply to us or to you, or any attempt to work around such sanctions
• receiving money on behalf of somebody else, which is money transmission and needs a licence we do not hold and cannot lend you
• fraud, deception, or taking payment for goods and services you do not intend to supply
• laundering the proceeds of crime, structuring payments to stay under a threshold, or obscuring where funds came from, including by routing them through a mixer
• activity that needs a licence you do not hold, including regulated financial services, gambling, and dealing in securities
• anything unlawful where you are, or where the customer paying you is
• probing or overloading the service, or mapping our fraud controls in order to evade them

We screen accounts, payout addresses and payments against sanctions and risk data, and we refuse, stop issuance, or report where the law requires. Sometimes the law forbids us from telling you that we reported, and we will comply with that even though we would rather explain.

Fees

We charge per transaction. The rate for your account is shown in the portal and agreed when the account is approved, and it applies to payments we match to one of your invoices. There is no fee for a payment we never see. Network fees are not ours: the cost of a transfer is set by the network and paid by whoever sends it, and we receive no part of it.

We cannot take our fee out of your payment, because the payment never reaches us. Your customer’s transfer arrives at your wallet in full. The fee is recorded against your account in USD when we charge it — normally as the payment confirms, sometimes later — and billed to you separately afterwards. It is never deducted from what your customer sent, because we are never holding it. The portal shows what you were charged in each month beside what you took in that month, so the bill can be checked against your own records.

If accrued fees go unpaid we may stop issuing live keys and suspend live processing until they are settled. We will tell you first, and access to your own records is not what we take away.

What this service cannot do

This section is not boilerplate. It is the part of these terms most likely to matter to you one day, so it is written as plainly as we can manage.

An on-chain payment cannot be reversed. Once your customer’s transfer is confirmed by the network it is final. We cannot reverse it, recall it, freeze it or claw it back; neither can you, and neither can anyone else. If you owe a customer their money back you must send a new payment from your own wallet, and that refund is a payment like any other: also final.

A payment sent to the wrong address is gone. If an address is mistyped, belongs to somebody else, or was swapped by an attacker who reached your account or your customer’s screen, the funds arrive wherever it pointed and stay there. Nobody can recover them — not us, not the network, not the operator of any wallet involved. That is how these networks work, not a limitation we could remove by trying harder.

So the payout address you register deserves more care than anything else on your account. Check it character by character in the wallet that owns it, and treat any request to change a payout address as an attack until you have proved otherwise yourself — including a request that appears to come from us. We will never ask you to send funds anywhere, and never for a private key or a seed phrase.

We watch the chain, but the chain is the authority. A network can halt, a data provider can fail, a node can lag, and a chain can reorganise and un-confirm a transaction we had already seen. We report a payment once we have seen enough confirmations to believe it settled, and we may correct ourselves afterwards. Where our record and the chain differ, the chain is right.

Webhooks are notifications, not proof. They are delivered on a best-effort basis, they are retried, and the same event may reach you twice. Verify the signature on every one, make your handler safe to run again, and reconcile against the API before you release goods of real value.

Suspension, and ending the agreement

You may close your account at any time. Your keys stop working, we stop watching for your payments, and we keep only the records we are required to keep — the privacy policy sets out which, and for how long.

We may suspend or restrict an account, immediately where we have to, if we reasonably believe it is being used for something in the prohibited list, that it has been compromised, that information we asked for has not arrived, that fees have gone unpaid, or that a law or lawful order requires it. A suspension stops the things that change the account — issuing live keys, adding wallets, taking live payments — and deliberately leaves you able to read it, because a merchant who has just been suspended is exactly the person who needs to see what happened.

Ending the agreement changes nothing about payments already made to your wallet: they were never ours to affect. Fees accrued before closure remain payable, and the sections on liability, prohibited use and governing law survive.

No warranty

The service is provided as it is and as it is available. We do not promise that it will be uninterrupted or free of defects, that a payment will be detected within any particular time, or that a network or data provider we depend on will behave. We give no warranty of fitness for a particular purpose beyond what the law requires of us.

Nothing here excludes liability that cannot lawfully be excluded, including liability for fraud and for death or personal injury caused by negligence.

Limitation of liability

Subject to the paragraph above, we are not liable for:

• the value of a payment sent to an address you registered, or that your customer entered, wherever that address turned out to point
• anything a network does — its fees, its congestion, a halt, a fork, a reorganisation, or the rules of the token contract itself
• a stablecoin issuer freezing, blacklisting or seizing at an address, which is a power they hold and we do not
• loss arising because an API key, webhook secret or credential of yours was not kept secret
• anything arising out of your relationship with your customer, including a dispute about goods, delivery or a refund
• indirect or consequential loss, lost profit, lost business, or damage to goodwill

Our total liability for all claims connected with the service is limited to the fees you actually paid us in the twelve months before the event giving rise to the claim. Whether a cap in that form is enforceable depends on the jurisdiction that has not yet been set below, and in some places it is not; this is a clause your lawyer should look at first.

Changes to these terms

We may change these terms. For a material change we will give at least thirty days’ notice by email to the address on your account and in the portal, unless a change must take effect sooner to comply with the law, in which case we will say so and why. Using the service after a change takes effect accepts it; if you do not accept it, close the account before that date. The date at the top identifies the version you are reading, and we will provide a superseded version on request.

Governing law and disputes

The standard clauses a lawyer expects alongside those — entire agreement, severability, assignment, waiver, force majeure, and how a formal notice is served — are deliberately not drafted here rather than guessed at. Their absence is a gap to fill, not a decision we made for you.