Terms of use.

01The operator #

DEBYKO — debyko.com, studio.debyko.com, agent.debyko.com, docs.debyko.com and the API at api.debyko.com — is operated by MB Debyko, a small partnership (mažoji bendrija) registered on 28 September 2026 in the Register of Legal Entities of the Republic of Lithuania, company code 308157191, registered office Girulių g. 10-201, LT-12112 Vilnius, Lithuania. Its sole member and director is Denisas Bykovas. Contact: support@debyko.com.

MB Debyko provides the service. Subscriptions use Stripe Managed Payments (section 06). Where these terms say “we”, they mean MB Debyko.

02What the service is #

DEBYKO collects market data from the public interfaces of crypto trading venues and shows it with its source, receive time, age and gaps kept visible. It is offered as:

• Studio — a web interface: live comparison of venues, history and point-in-time replay of what each venue showed.
• API — the same data for your code, under the same key.
• Agent — conditions you write in DQL, evaluated on your schedule; when one becomes true, Agent notifies you by Telegram or webhook with the values it fired on. Agent sends notifications, never instructions.
• Runner — software you run on your own infrastructure. It receives a webhook from Agent or Studio and places orders on an exchange with your own API keys. We publish it; we do not run it and never receive your keys.
• Agent board — a public board of agents, built from execution reports that Runners send back. Every figure on it says whether it is self-reported or verified.

Current plan limits are on Pricing. Products that are not live are described on the Roadmap.

03What the service is not #

MB Debyko is not a financial institution, an investment manager, a broker or a provider of financial or crypto-asset services. We give no investment advice, do not accept, hold or transmit third parties’ money or crypto-assets, do not operate third parties’ exchange accounts and do not receive, execute or route orders.

Orders placed through Runner are placed by your own software, with your own keys, on your own infrastructure, on your own decision. A notification from Agent, a row on Agent board or a figure in Studio is a statement about data we observed; it is not an offer, a forecast, a recommendation or individual advice. Any decision taken on the basis of the data is yours.

04Data, as observed #

Data is provided as it was observed, as is and without warranties — in particular without a warranty of completeness, accuracy or fitness for any purpose. Current venue and layer availability, with recorded collector gaps, is stated on Coverage; gaps in historical data are shown as gaps, never filled.

A venue’s own timestamp is printed as the venue sent it. The time the value was received and its age are shown beside it; the rules for every figure are on Methodology. Venues can change, delay or withdraw what they publish at any time.

05Accounts and keys #

An account is opened with an email address; we send a sign-in code and link to it and store no password. Each account holds one API key, on every plan. A key is personal to the account: it may be used by the account holder and their own software, and may not be shared, resold or embedded in a product that serves third parties. The full key is shown once; we store only a hash and a prefix.

Several keys under one account are the Team offer, agreed with sales.

You are responsible for what is done with your key. If it is exposed, revoke it from your account and a new one is issued. We may revoke a key that is used against these terms, after notice where that is practical.

06Plans, trials and payment #

Plans, their contents and prices are those published in the pricing section of the home page on the day you subscribe. The Free plan needs no card and has no time limit.

Paid plans are sold monthly. Mini, Standard and Pro start with a free trial of 14 days: a card is taken at the start and the first charge is on day 15. If you cancel during the trial, nothing is charged. From day 15 the plan renews every month until cancelled. The trial is the one shown in the pricing section; it has no other conditions. Pro Plus has no trial: the card is charged at checkout and the plan renews every month from that day. You can cancel any plan at any time from your account; cancelling ends the subscription and its access at once, and nothing further is charged. A payment made in the last 14 days is refunded in full on request (Refund policy). You can also switch plan from your account: during a trial the trial continues on the new plan; after it, the difference for the rest of the month is charged or credited at once.

New subscriptions use Stripe Managed Payments. Stripe, through Link, is the merchant of record at checkout and handles the card payment, applicable indirect taxes, receipts and invoices. MB Debyko operates the service and manages your access; we do not see your card details.

We may change prices or plan contents. A change that affects a running subscription takes effect at the first renewal at least thirty days after we have emailed you about it; you can cancel before then. Any payment can be refunded in full within fourteen days, for any reason, as the refund policy says.

07Acceptable use #

Use the service within the limits of your plan. Do not work around rate or quota limits, scrape the interface to obtain data the API does not give you, or run software that degrades the service for others. Data may be used in your own analysis, products and trading; raw data may not be redistributed as a data product without a written agreement.

08Availability and changes #

We run the service with care and publish its state on Status, per venue and per collector. We do not promise uninterrupted availability, and no plan on this page carries a service-level agreement. Interfaces, fields and limits can change; changes to the API are versioned and announced in its documentation.

09Liability #

To the extent the law allows: we are not liable for loss of profit, trading losses, loss of data or indirect loss arising from the service or from reliance on its data; our total liability for any claim connected with the service is limited to the amount you paid us in the twelve months before the claim. Nothing in these terms limits liability that cannot be limited by law, or the rights a consumer has under the law of their country of residence.

10Termination #

You can close your account at any time from it; a payment made within the last fourteen days is refunded on request, as the refund policy says. We can close an account that is used against these terms or that has been inactive for two years on the Free plan, after notice to its email address. On closure, keys stop working and the account’s data is deleted within thirty days, except records the law requires us to keep.

11Governing law and disputes #

These terms are governed by the law of the Republic of Lithuania. Disputes are settled by the courts of Lithuania, unless you are a consumer and the law gives you a different forum. A consumer resident in Lithuania can also turn to the State Consumer Rights Protection Authority (Valstybinė vartotojų teisių apsaugos tarnyba).

12Paying with USDC (x402) #

Some API endpoints and all plans can be paid in USDC on the Base network through the x402 protocol, without a card checkout. Prices are stated in US dollars and settled in USDC at 1 USDC = 1 USD. A per-request payment covers that one request; a plan payment covers thirty days of the named plan from the moment of settlement, does not renew, and issues an API key once. On-chain transactions are final: there are no refunds, chargebacks or reversals for payments made this way. By sending a payment you expressly agree that the service begins immediately on settlement and acknowledge that you lose the right to withdraw within fourteen days (Articles 16(a) and 16(m) of Directive 2011/83/EU). This applies equally to a per-request payment of a few cents. Payment verification and settlement are performed by Coinbase Developer Platform as facilitator; we record the transaction hash, the paying address, the amount and the time of settlement as accounting evidence (see Privacy). You remain responsible for any tax that applies to you.

—Changes to this page #

• 2026-09-18First publication of this page.
• 2026-09-24Pro may hold up to five keys; each key remains personal to the account.
• 2026-09-22Products renamed and described as Studio, API, Agent, Runner and Agent board. Accounts and keys, plans, trials and payment through the payment provider of the time (Stripe since 2026-10-05), acceptable use, availability, liability and termination added. References to email-arranged subscriptions removed.
• 2026-09-27Pro Plus added, sold without a trial and charged at checkout; the seven-day trial now applies to Mini, Standard and Pro. Every self-serve plan holds one key — the five keys Pro carried since 2026-09-24 are withdrawn, and several keys under one account remain the Team offer.
• 2026-09-29The operator and seller is MB Debyko, company code 308157191, registered 2026-09-28; it replaces the previous operator, which no longer operates DEBYKO or holds its payment provider account. Section 05 states one key on every plan. Refunds: fourteen days on any payment, no conditions.
• 2026-09-29The trial for Mini, Standard and Pro is 14 days, with the first charge on day 15; Pro Plus and Free have no trial.
• 2026-09-30The sign-in email carries a six-digit code as well as the link; still no password.
• 2026-10-02Section 12 added: paying with USDC (x402).
• 2026-10-05Section 06 updated for subscriptions through Stripe Managed Payments.
• 2026-10-06Section 06: cancelling ends a subscription and its access at once; plans can be switched from the account, with the difference charged or credited.

Each later change is added here with its date.