Estonian e-Business Register API

Free Estonian e-Business Register autocomplete API with no key: search Estonian companies by name and get registry code, legal address, status and historical names.

No API key requiredCORS enabledHTTPSFree tier

Endpoint tested and returned HTTP 200 on 2026-08-21

What is the Estonian e-Business Register API?

Estonia's e-Business Register offers a free autocomplete endpoint with no key that searches registered companies by name and returns the registry code, legal address, status and any historical names.

Estonia's registry is one of the more accessible in Europe, and this endpoint is built for the job most applications actually need: turn what a user typed into a registry code. Responses are small and fast enough to wire directly to a search field, and every result carries a `url` pointing at the public registry page for that company, which is a good link to show alongside a match.

The eight-digit registry code (`reg_code`) is the identifier to store; `company_id` is an internal registry key and not the number that appears on Estonian invoices or contracts. Two other fields carry real information: `status` uses single-letter codes where `R` means registered, and `historical_names` records former names — Swedbank AS still shows `Aktsiaselts Hansapank`, which is how you match a pre-2008 document to a current entity.

Quick facts

Base URL: https://ariregister.rik.ee/est/api
Authentication: No key for the autocomplete endpoint. Full registry extracts and the detailed data service require registration.
Rate limit: No published limit. It is a search-as-you-type endpoint, so debounce client-side rather than firing per keystroke.
Pricing: Free.
CORS: Enabled — callable directly from browser JavaScript
Official docs: Read the docs

How to use the Estonian e-Business Register API

Every request below was executed against the live API on 2026-08-21, and the response shown is the real body it returned — not an illustration.

1. Search the Estonian register for Swedbank

GET https://ariregister.rik.ee/est/api/autocomplete?q=swedbank

curl

curl 'https://ariregister.rik.ee/est/api/autocomplete?q=swedbank'

JavaScript (fetch)

const res = await fetch("https://ariregister.rik.ee/est/api/autocomplete?q=swedbank");
if (!res.ok) throw new Error(`Request failed: ${res.status}`);
const data = await res.json();
console.log(data);

Python (requests)

import requests

res = requests.get("https://ariregister.rik.ee/est/api/autocomplete?q=swedbank", timeout=20)
res.raise_for_status()
print(res.json())

Response — HTTP 200 (truncated)

{
  "status": "OK",
  "data": [
    {
      "company_id": 9000143607,
      "reg_code": 12919435,
      "name": "Swedbank AB Eesti filiaal",
      "historical_names": [],
      "status": "R",
      "legal_address": "Harju maakond, Tallinn, Kesklinna linnaosa, Liivalaia tn 34",
      "zip_code": "15040",
      "legal_form": "10",
      "url": "https://ariregister.rik.ee/est/company/12919435/Swedbank-AB-Eesti-filiaal"
    },
    {
      "company_id": 2000009492,
      "reg_code": 10060701,
      "name": "Swedbank AS",
      "historical_names": [
        "Aktsiaselts Hansapank"
      ],
      "status": "R",
      "legal_address": "Harju maakond, Tallinn, Kesklinna linnaosa, Liivalaia tn 34",
      "zip_code": "15040",
      "legal_form": "1",
      "url": "https://ariregister.rik.ee/est/company/10060701/Swedbank-AS"
    },
    {
      "company_id": 2000001500,
      "reg_code": 10194399,
      "name": "Swedbank Investeerimisfondid Aktsiaselts",
      "historical_names": [
        "Aktsiaselts Hansa Investeerimisfondid",
        "HANSA AKTIVATE JUHTIMISE AKTSIASELTS"
      ],
      "status": "R",
      "legal_address": "Harju maakond, Tallinn, Kesklinna linnaosa, Liivalaia tn 34",
      "zip_code": "15040",
      "legal_form": "1",
      "url": "https://ariregister.rik.ee/est/company/10194399/Swedbank-Investeerimisfondid-Aktsiaselts"
    },
    {
      "company_id": 2000017594,
      "reg_code": 10142356,
      "name": "Swedbank Life Insurance SE",
      "historical_names": [
        "Swedbank Elukindlustus Aktsiaselts",
        "Aktsiaselts Hansa Elukindlustus",
        "Hansa

Parameters

Parameter	Type	Required	Description
`q`	query	Required	Search term — a company name fragment or a registry code. `swedbank`
`results_limit`	query	Optional	Cap on the number of matches returned. `5`

Response fields

statusstring: Request-level status — `OK` on success.
data[].reg_codeinteger: Eight-digit registry code. This is the public identifier used on invoices and contracts.
data[].company_idinteger: Internal registry key. Not the number to display or store as the company's identifier.
data[].namestring: Current registered name.
data[].historical_namesarray: Former registered names, empty for companies that never renamed.
data[].statusstring: Single-letter registry status — `R` for registered.
data[].legal_address / zip_codestring: Registered address as a formatted string, plus postcode.
data[].legal_formstring: Numeric legal form code.
data[].urlstring: Public registry page for the company, suitable for linking from your UI.

What you can build with the Estonian e-Business Register API

Autocomplete an Estonian company field during onboarding
Resolve a registry code from a company name
Match older documents to a company through its historical names
Link users to the official registry page for a company you display

Common errors and how to fix them

Empty data array

No company matched the term.

Fix: Estonian names include forms like AS and OÜ. Search a distinctive fragment rather than the full legal name.

Wrong identifier stored

`company_id` was saved instead of `reg_code`.

Fix: `reg_code` is the public eight-digit number that appears on Estonian documents. `company_id` is internal.

Too many requests from an autocomplete

The endpoint was called on every keystroke.

Fix: Debounce to at least 300ms and set `results_limit`; this is a courtesy endpoint on a public registry.

Estonian e-Business Register API — frequently asked questions

Is the Estonian business register API free?

The autocomplete search endpoint is free with no key. Fuller registry extracts and the detailed open data service require registration through the registry's open data portal.

What is an Estonian registry code?

An eight-digit number identifying a registered legal entity. It appears on Estonian invoices and contracts and is the field to store — not the internal `company_id` the API also returns.

Can I see a company's former names?

Yes. The `historical_names` array lists former registered names, which lets you match documents predating a rename to the current entity.

What does status R mean?

`R` marks a registered, active company. The registry uses single-letter status codes; anything other than `R` is worth checking against the linked registry page before relying on the record.

Tools that pair with this API

JSON Formatter

Format, beautify and minify JSON online with 2-space, 4-space or tab indentation. Sort keys alphabetically and catch syntax errors instantly — free and private.

CSV to JSON Converter

Convert CSV to a JSON array of objects online. Header-row detection, comma/semicolon/tab delimiters and pretty-printed output — 100% in your browser.

URL Parser

Parse a URL into protocol, host, port, path, query parameters and hash. Handles relative URLs with a base and shows query params in a table. Free and private.

Estonian e-Business Register is an independent third-party service and is not affiliated with ByteTools or ByteVancer. Details on this page were verified on 2026-08-21; always check the official documentation before relying on this API in production, as terms and limits can change.