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Terms of service

This English version is a translation provided for information. Only the Hungarian text is legally binding: the Hungarian original.

What adatka provides, what it does not promise, and what we ask in return. One page, without legalese — but binding.

These terms are changing. The new text takes effect on 2 November 2026; until then, the text below remains in force. The new text and a summary of the changes

In force: 20 September 2026 · Amendment: 21 September 2026 — section 5: use by querying, and the prohibition on copying out the entire dataset; section 6: Magyar Posta Partner Extra as a source. · Amendment: 23 September 2026 — section 6: the Magyar Posta layer made live. · Language correction: 24 September 2026 — the reader is addressed uniformly as “Ön” (the formal “you”); the content of the terms did not change. · Clarification: 24 September 2026 — description of the list of sources: it applies to the response as a whole, not field by field. · Amendment: 25 September 2026 — section 3: the description of the service; section 4 revised (beta and availability; a missing match does not prove that the address does not exist); section 6 revised (the results and the source licences). · Amendment: 30 September 2026 — section 1: the operator's current legal status, and how the operator's name and place of residence can be requested in order to enforce a legal claim; section 8: access to earlier versions; section 9 revised (new title: Applicable law and disputes): mandatory protection of consumers, amicable settlement with a 30-day response time (not a precondition for going to court), the condition for launching a paid service, the courts in Hungary and the order for payment, provision of the operator's name and place of residence within 8 days. · Clarification: 2 October 2026 — section 4: returning the floor and door as entered. · Announcement: 3 October 2026 — we published the new text of the terms (material amendment); until the new text takes effect, this text remains in force.

1. Who you are contracting with

With the operator of adatka.hu. The operator is currently a private individual: the operator runs adatka.hu neither as a sole trader nor through a company. We do not publish the operator's name and place of residence on the site; if you need them in order to enforce a legal claim against the operator, we provide them in the manner described in section 9. What changes when the service is provided by a sole trader or a registered company is described in the Legal notice.

The service is free of charge. There is no fee, no invoice and no subscription. When a paid plan is launched, this will happen by amending these terms, with advance notice.

2. When the agreement is concluded

When you start using the site or the API. No separate click of acceptance is needed for these terms to bind you.

3. What the service provides

4. Beta and availability

This section is more important than the others. Better to read it here than to learn it from a failed delivery.

The service currently operates as a free-of-charge beta. We aim to run it continuously and reliably, but for now we do not commit to guaranteed availability or a fixed time for resolving faults. Temporary outages may occur because of maintenance or technical faults, and the features and response formats may change in the course of development.

The operator does not guarantee that the data sources are complete, accurate or up to date. A match is not an official certificate.

Floor and door are not checked. The response returns the floor and door as entered in a separate field, but such data does not appear in the open sources, so we do not check it.

If a house number does not appear in Adatka's data sources, this does not prove that the address does not exist. Therefore, do not use Adatka in such a way that a missing match automatically prevents an order, a registration or the handling of a case; provide an option for manual entry or checking.

5. Usage limits

There is no numerical quota today. These conditions, however, do apply:

If use hinders others, the operator may restrict or refuse access. This may also happen without prior warning if the operation of the service is at stake.

6. The results and the source licences

The use of the API's results is governed jointly by these terms, any individual agreement, and the licences of the sources indicated for the result.

The ODbL obligations also depend on whether the user creates and makes publicly available a produced work or a derivative database. Before creating or publishing a larger dataset, examine the original licence terms.

7. Liability

The service is available “as is”. The operator is not liable for damage resulting from missing, outdated or incorrect data, nor for damage resulting from an outage of the service. This is the price of the service being free of charge, and that is why section 4 exists.

This section does not limit the rights to which a consumer is entitled by law.

8. Amendment and termination

The terms may change; the version in force appears on this page, with its date. We keep the earlier versions. If you need one of them, write to info@adatka.hu stating the date for which you want the text that was in force, and we will send it to you by email within 8 days. In these, too, we provide the operator's name and place of residence only in the manner described in section 9. In the event of a material change, we also indicate it on the home page.

The service may be discontinued at any time. Therefore, do not build on it a process that does not work without it — have a fallback.

9. Applicable law and disputes

These terms and the agreement are governed by Hungarian law. If you are a consumer — that is, you use the service as a natural person, not for business or professional purposes — this choice of law does not deprive you of the mandatory protective rules that would apply to you in the absence of a choice of law; these may include the rules of the country where you live.

If you have a dispute with us, please first write to info@adatka.hu describing what happened, when, and what you are asking for; if you have them, attach the query and the response you received. We will examine it and reply on the merits by email within 30 days of receipt of your message; if we reject your request, we will give reasons.

adatka.hu is currently operated by a private individual — not as a sole trader and not through a company — as a free-of-charge beta (see sections 1 and 4). A paid service will only start once the operator has registered as a sole trader, or once the service is provided by a registered company. By then, we will publish in the Legal notice the name, registered office, registration number or company registration number, and tax number of the sole trader or of the company, and we will supplement this section with a postal address for submitting complaints, and with information about the conciliation boards (békéltető testület) and the consumer protection authority. If you are already entitled by law to turn to an authority or a conciliation board, this section does not limit that right.

Going to court does not require that you first try to settle the dispute with us. You can enforce your claim against us before the courts in Hungary; which court is competent is determined by Act CXXX of 2016 on the Code of Civil Procedure. As a general rule, the case is heard by the court for the place of residence or registered office of the defendant (the party being sued). A monetary claim of at most HUF 3 million that has fallen due must normally — if both parties have a known address in Hungary — be enforced by means of an order for payment (fizetési meghagyás), before a notary.

The statement of claim and the application for an order for payment must state the name of the other party (the defendant or the obligor, respectively) and at least their place of residence or registered office. We do not publish the operator's name and place of residence on the site, but we provide them:

The request is complete if, in the message, you:

Before providing the data, we do not examine whether the claim is well founded; you do not need to attach any document or proof. Within 8 days of receipt of the complete request, we send the operator's name and place of residence by email to the address from which the request was sent. If something is missing from the message, we tell you what is missing within 8 days of its receipt. We keep the request and our reply for the period described in the Privacy notice.

You can check which district court (járásbíróság; in Budapest, kerületi bíróság) and which regional court (törvényszék) a settlement or postal code belongs to on the official website of the courts (birosag.hu), under the “Bíróság kereső” (court finder) menu item, together with their contact details.

This section does not limit the rights to which a consumer is entitled by law — including the right to sue before the court of their place of residence, and to be sued only there, if Hungarian or EU law guarantees this.

10. Contact

info@adatka.hu