API Terms of Service
Last Updated: 17 October 2026
These Terms govern your use of the Kopyon API at api.kopyon.com and of the console at console.kopyon.com, where you manage it. They are separate from the Terms and Conditions that govern the Kopyon copy trading application. Neither document applies to the other product.
The API is a data feed. You ask for data, by request, stream or webhook, and we return JSON. None of your money is in play, and no software of ours places an order anywhere. That makes this a far shorter document than the one covering the application, and most of what follows is about where the data comes from, what you may do with it, and what we do not promise.
By creating an account in the console, or by calling api.kopyon.com with or without a key, you agree to these Terms and to our Privacy Policy.
1. Who You Are Contracting With
Kopyon is operated by an individual, not by an incorporated company. Throughout these Terms, "Kopyon", "we", "us" and "our" refer to that operator. "You" refers to the person or organisation using the API.
We say this plainly because it affects you: there is no corporate entity standing behind the service, and you should size your reliance on it accordingly.
2. What the API Is
The API serves data about public traders on the exchanges and platforms we support: rankings and search, profiles, performance, chart series, open positions, and the history of their closed positions, orders and transfers, wherever the source publishes them. The sources currently offered are Binance Smart Money, Binance Smart Signal, Binance Copy Trading, Hyperliquid and its vaults, OKX, Bybit (copy trading and leaderboard), Bitget, Gate, BingX, MEXC, KuCoin, HTX, BloFin and dYdX. The list at /v5/sources is the authoritative one, and section 8 explains what we may change about it.
You can read the data in three ways: HTTP requests, a WebSocket stream that tells you when a trader's positions or history change, and webhooks, signed requests we send to a URL of yours with the same changes. The endpoints, parameters, messages, and the shape of every response are documented in the API reference.
Some figures are worked out by us, not sent by the source. Where an exchange publishes a position without its price or profit, we take its public mark price and compute unrealised profit, margin and return the way that exchange's own site does. Where an exchange keeps no order or position history, as on Hyperliquid, we rebuild it from the trader's fills. Every source is converted to the same units, so rates arrive as fractions and sizes in the base asset.
The data is as fresh as the source allows. Each exchange refreshes its own data on its own schedule, from about a second to several minutes, and the reference states that interval where we know it. To protect the sources and keep you within their limits, identical requests made at the same moment share one call upstream, and the answer is reused for about a second; reference data that rarely changes, such as contract sizes, is kept for up to an hour. What reaches you may therefore be as old as the source's own refresh plus that second.
The API is not an investment adviser, a broker, a trading signal service, or a recommendation to do anything. It returns data. What you build on it, and what you do with the result, is yours.
It is a separate product from the Kopyon application. An API key gives you no access to the copy trading application, and an application subscription gives you no access to the API.
3. Eligibility
You must be at least 18 years old and legally capable of entering into a binding contract.
You must not be located in, ordinarily resident in, or accessing the API from a comprehensively sanctioned jurisdiction, currently including Cuba, Iran, North Korea, Syria, and the Crimea, Donetsk and Luhansk regions of Ukraine. You must not be a person subject to sanctions administered by the United Nations, the European Union, the United Kingdom, or the United States.
There is no restriction on United States persons. The copy trading application bars them because a US user cannot connect a futures account for it to trade, so a subscription would buy them nothing. That reasoning does not apply to buying data, so it does not apply here.
We do not verify any of this. By using the API you represent that it is true of you.
4. Your Account and Keys
You create an account at console.kopyon.com. Sign-in is handled by our authentication provider, Clerk, which is also used by the Kopyon application. Using the console to create keys or buy a plan means accepting these Terms; the application's Terms and Conditions do not apply to your use of the API. If you held a key from the previous version of the API, you can claim it in the console and it keeps working.
An account belongs to one person or one organisation. Use its keys inside your own organisation, including by contractors working on your integration. Do not give a key to another business, do not resell access to it, and do not use one account to serve two organisations. Do not open several accounts to add up free allowances: the free allowance is shared by every free account calling from the same network, as section 5 explains.
Keys are shown once. We store only a hash of each key, so we cannot show it to you again or recover it; if you lose one, revoke it and create another. You can limit each key to some of the HTTP API, the stream and webhooks, give it an expiry date, and restrict it to the IP addresses you list. A request outside those limits is refused and is not charged.
You are responsible for everything done with your keys, including requests made by someone who obtained one from you. Allowances are counted against your account, so a leaked key spends your allowance before it costs us anything. Revoke a leaked key in the console at once, and tell us at [email protected] if you need help.
5. Plans, Limits, and Payment
Each plan sets a monthly allowance and a rate limit. The current figures are published in the console and on the API page, which are the authoritative list. We may change them, and where a change reduces what a plan allows we will tell existing customers before it takes effect.
The monthly allowance is counted across your whole account, every key together, in periods of 30 days rather than calendar months. On the Free plan the first period begins with your first counted request; on a paid plan it begins when the plan does. The rate limit is counted per minute and per endpoint, so a burst against one endpoint does not throttle the others. Requests refused because of a limit, a key's scopes, its expiry or its allowed IP addresses do not count, and neither do calls to the documentation and the OpenAPI schema.
The stream and webhooks count too. Each time we check a source for one of your subscriptions, it counts as one request, however many pages the check reads and however many of your connections and webhooks follow that same subscription. They are available on paid plans; the console's playground lets you try them on any plan.
Trading Desk lets you cap each key. You can give a key its own monthly limit, so one integration cannot spend the allowance of the others. A request past a key's limit is refused without taking anything from the account.
The Free plan needs no payment. It is not a trial and it does not expire. Its allowance is shared by every free account that calls from the same network (an IPv4 address, or an IPv6 /64), so opening more free accounts does not add requests. Calls without a key are allowed a small daily allowance per IP address and endpoint, so the API can be tried without signing up; that allowance is a courtesy rather than a plan, and we may change or withdraw it at any time.
You pay in the console, in cryptocurrency, through our processor NOWPayments. Prices are set in US dollars per 30-day period, and you can buy 1, 6 or 12 periods at a time. We do not store a payment method, so nothing renews and there is nothing to cancel: we email you three days before your paid time ends, and if you do nothing your account returns to the Free plan when it does. There is no grace period.
Buying again adds time. A new purchase, at the same plan or a lower one, starts when the paid time you already have ends, so you never lose time you bought. An upgrade takes effect as soon as it is paid, keeps your current end date and your current 30-day period, and costs the difference between the two plans' prices for the time that remains. Requests you have already made in the period still count against the new allowance.
A plan activates only when the payment settles in full. If a payment arrives short, twice, or after its invoice expired, it does not activate anything by itself: write to us with the invoice and we will activate the plan, credit the difference, or return the money, as the case requires. Crypto payments cannot be reversed, so a refund is always a new transaction we send.
Private plans. We also agree plans with individual customers, with their own limits and terms. Those plans are not offered in the console; we set them up for you.
6. Refunds
We will refund your first purchase in full, within 14 days of paying, if you have made no more requests in that time than the Free plan allows. That holds whether you bought 1, 6 or 12 periods. The Free plan exists precisely so you can evaluate the API without paying, so the test is simply whether you used capacity you actually paid for. No proportionate deduction, no administrative fee. Later purchases and upgrades are outside this guarantee.
Statutory rights come first. If you are a consumer, the law where you live may give you a right to cancel an online purchase and get your money back. In the European Economic Area and the United Kingdom that is generally 14 days from the day the contract is concluded. That right exists independently of the guarantee above, nothing here restricts it, and we will not apply the guarantee's condition to it.
Most API customers are businesses, and a business buyer has no statutory withdrawal right. The guarantee above is what applies to you.
A refund is sent by hand, in USDT, for the US dollar value of the invoice, to an address you give us; tell us if you would rather receive the coin you paid with. Check the address and its network, because a transfer to a wrong one cannot be recovered. Your paid time ends when the refund is sent. Ask at [email protected] and a person will read it.
7. What You May Do With the Data
What your plan covers. Free licences the data for evaluation — building and testing an integration rather than running one in production. It does not expire and it never asks for a card; the limit is on what you use it for, not on how long you keep it. Developer licences one production system, run by you or by people working for you. Trading Desk licences commercial use across your firm, on as many internal systems as you need. Dedicated adds redistribution rights, negotiated in your contract. Everything else in this section applies to every plan.
You may build products on the data, store it, transform it, analyse it, and publish conclusions you draw from it.
You may not redistribute the raw responses. Do not resell, republish, syndicate, or otherwise make available the data we return in substantially the form we return it, whether directly or through a proxy, mirror, or wrapper API. Building a competing feed out of our responses is the one use this licence does not cover.
Derived output is yours, on every plan. Charts, rankings, alerts, scores, signals, dashboards, and anything else you compute from the data are yours to publish and to sell. Selling a product built on the data is not the same as reselling the data, and the plan tiers above do not restrict it — what they scope is how many systems you may run, not whether you may earn from what you build.
Caching for your own use is fine. Store whatever you need to run your product. The restriction is on redistribution, not on storage.
8. Where the Data Comes From
The exchanges and platforms in section 2 publish it about traders who chose to make their activity public, on leaderboards, copy trading pages and public blockchains. Those traders are not Kopyon users, we have no relationship with them, and we do not vet them.
Most sources do not offer the data as an official API. We read it from the same public pages their websites use; only some, such as OKX's copy trading API and the Hyperliquid and dYdX public interfaces, are documented for this purpose. A source can change its format, limit our access, or stop publishing at any time. We may add, change or withdraw a source when that happens or when continuing to serve it would expose us to legal risk, and we will tell paying customers when we withdraw one for good.
We claim no ownership of the underlying data. It belongs to the traders and to the platforms that publish it. What is ours is the interface, the documentation, the figures we compute, and the delivery, and nothing here transfers any of that to you beyond the licence in section 7.
We do not warrant that the data is accurate, complete, or current. It may be delayed, incomplete, or wrong, whether because a source published it that way, because a request upstream failed, because a figure we compute from a public price differs from the one the exchange holds, or because a trader stopped sharing. A trader may hide their positions or leave a ranking at any time and take their history with them.
Past performance does not indicate future results. A trader's record, however long or however strong, tells you nothing reliable about what they will do next. If you present this data to your own users, present it with that in mind.
9. Availability
We do not promise uptime. The API reads third parties we do not control: when a source is slow, rate-limited, or down, so is that part of the API. We also take the service down for maintenance.
We publish what actually happened rather than promising a number. Historical availability is at status.kopyon.com. There is no service level agreement and no service credit.
Parse defensively. We may add fields to a response at any time, so ignore what you do not recognise. The path carries a version number; where a change would break an existing integration we will publish it under a new version where practical, and we will give notice before retiring an old one.
Webhooks are delivered on a best-effort basis. We try each message three times, and a webhook pauses after ten failed deliveries in a row, or when its key is revoked or your allowance runs out; we email you when it pauses by itself. Your endpoint is yours to keep reachable, and to check that each delivery carries our signature.
10. Acceptable Use
Do not:
- Circumvent a rate limit or allowance, whether by rotating keys, opening several accounts, rotating IP addresses, or any other means.
- Redistribute raw responses, in breach of section 7.
- Attempt to reach endpoints, versions, or infrastructure you have not been given a key for.
- Probe, scan, or attack the service, or interfere with anyone else's use of it.
- Use the API in a way that is unlawful where you are.
11. Suspension and Termination
We may suspend an account or revoke a key for breach of these Terms, for non-payment, for abuse, where required by law or sanctions, or where continuing to serve you would expose us to legal risk. Where it is reasonable and lawful to do so, we will tell you why and give you a chance to respond. For serious breaches we may act immediately.
You may stop at any time by not paying for another period, and revoke any key in the console whenever you like.
Sections 7, 8, 12, 13, 14 and 15 survive termination, along with any other provision that by its nature should.
12. Disclaimer of Warranties
THE API IS PROVIDED ON AN "AS IS" AND "AS AVAILABLE" BASIS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND NON-INFRINGEMENT.
WITHOUT LIMITING THAT, KOPYON DOES NOT WARRANT THAT THE API WILL BE UNINTERRUPTED, TIMELY, SECURE, OR ERROR-FREE; THAT ANY REQUEST WILL SUCCEED OR RETURN WITHIN ANY PARTICULAR TIME; THAT THE DATA RETURNED WILL BE ACCURATE, COMPLETE, OR CURRENT; OR THAT THE API WILL REMAIN COMPATIBLE WITH ANY INTEGRATION YOU HAVE BUILT.
No advice or information obtained from us creates any warranty not expressly stated here.
13. Limitation of Liability
To the maximum extent permitted by law, Kopyon is not liable for any indirect, incidental, special, consequential, exemplary, or punitive damages, or for any loss of profits, revenue, goodwill, opportunity, or data, arising from or relating to your use of the API, whether in contract, tort, or otherwise, even if we were advised such damages were possible.
In particular, we are not liable for what you or your users do with the data. This includes trading losses taken on the strength of it, decisions made from data that turned out to be wrong or stale, and downtime that stopped your product working.
Our total aggregate liability for all claims relating to the API is limited to the greater of the fees you paid us for it in the 12 months before the event giving rise to the claim, or USD $100.
These limits reflect a deliberate allocation of risk. The API is priced as a data feed, not as a dependency that assumes your business risk, and we could not offer it at that price on any other basis.
Some jurisdictions do not allow the exclusion or limitation of certain warranties or liabilities. In those jurisdictions our liability is limited to the maximum extent permitted by law, and the exclusions above may not apply to you. Nothing here excludes liability for fraud, for fraudulent misrepresentation, for death or personal injury caused by negligence, or for any other liability that cannot lawfully be excluded.
14. Indemnity
You agree to indemnify and hold Kopyon harmless from any claim, loss, liability, or expense, including reasonable legal fees, arising from your use of the API, your breach of these Terms, your redistribution of the data, your violation of any law or sanctions regime, or your misrepresentation of your eligibility under section 3.
15. Governing Law and Disputes
If you are a consumer, the law of the country where you habitually reside governs these Terms, and you may bring proceedings in your local courts. Nothing here overrides consumer protection rights granted by your local law.
If you are not a consumer, Costa Rican law governs these Terms without regard to conflict-of-law principles. You submit to the non-exclusive jurisdiction of the courts of Costa Rica.
Before starting proceedings, please email [email protected] and give us 30 days to resolve the matter.
Claims must be brought individually. To the extent permitted by law, you agree not to bring or participate in a class, collective, or representative action against us.
Our infrastructure is hosted in Germany, which is relevant to how personal data is processed and is addressed in the Privacy Policy. It does not otherwise change the governing law of this agreement.
16. Changes to These Terms
We may update these Terms. The date at the top always reflects the current version. For a change that materially reduces your rights or increases your obligations, we will email the address on your account before it takes effect, and continuing to use the API after that date means you accept it.
17. Contact
For keys, billing, refunds, and anything else in these Terms: [email protected].
For privacy questions and data rights: [email protected].