# Accquix Register > Self-hosted search and lookup API for Slovak business register data: the Register of Legal Entities and the Financial Administration lists, mirrored into your PostgreSQL. ## Docs - [Accquix Register](https://register.accquix.com/): Your own searchable copy of the Slovak business registers, with a small API for search and lookup. Open source, self-hosted, no subscription. - [Quick start](https://register.accquix.com/quickstart): Run Accquix Register with docker compose, wait for the first sync, and make your first search and lookup. ## Concepts - [How it works](https://register.accquix.com/concepts/how-it-works): The sources, the sync that mirrors them, the search layer, and the API that serves them. - [Subjects and identifiers](https://register.accquix.com/concepts/subjects): One subject per IČO with all its registrations, how identifiers are matched, and the quirks of the source data. - [How search works](https://register.accquix.com/concepts/search): How the default search and the optional fuzzy search work, how results are ranked, and what each costs. - [Freshness and certainty](https://register.accquix.com/concepts/freshness): Section states, stale data, when the API says "not found", and section versions. - [VAT status](https://register.accquix.com/concepts/vat): What the VAT section says, why §7 and §7a subjects are not VAT payers, and how to word it on documents. ## Using the API - [Authentication](https://register.accquix.com/api/authentication): API keys, the explicit anonymous mode, and the public endpoints. - [Search](https://register.accquix.com/api/search): GET /v1/search for autocomplete by name or identifier, and the explicit fuzzy mode. - [Lookup](https://register.accquix.com/api/lookup): GET /v1/lookup/{id} by IČO, DIČ or IČ DPH, and what each section of the answer means. - [Change detection](https://register.accquix.com/api/changes): Use POST /v1/lookup:batch with section versions to find out daily which of your counterparties changed. - [Errors and limits](https://register.accquix.com/api/errors-and-limits): Problem documents, error codes, rate limits and timeouts. - [Integrating an application](https://register.accquix.com/api/integration): A checklist for using the register in an invoicing or accounting application. - [AI agents (MCP)](https://register.accquix.com/api/mcp): Connect Claude, Cursor and other MCP clients to your own instance through a read-only MCP endpoint, with the same keys, limits and rules as the REST API. - [Versions and stability](https://register.accquix.com/api/stability): What your integration can rely on across versions, what counts as a breaking change, and how a change is announced. ## Self-hosting - [Requirements](https://register.accquix.com/self-hosting/requirements): Hardware, database and network requirements, measured on the real data. - [Operations](https://register.accquix.com/self-hosting/operations): Monitoring, blocked sources, objections, upgrades and rebuilds. - [Configuration](https://register.accquix.com/self-hosting/configuration): Every command and environment variable. ### Deployment - [Docker compose](https://register.accquix.com/self-hosting/docker-compose): The reference deployment, its services, secrets and settings. - [Coolify, Dokploy and similar](https://register.accquix.com/self-hosting/paas): Deploy on a platform that runs Docker Compose from a Git repository, with every secret in the platform's environment settings. - [AWS](https://register.accquix.com/self-hosting/aws): A reference layout on ECS Fargate with RDS for PostgreSQL, and the pitfalls specific to AWS. - [Other platforms](https://register.accquix.com/self-hosting/platforms): Running the image on any platform with a long-lived container and a scheduled job. ### Database - [Database](https://register.accquix.com/self-hosting/database): Roles, connections, managed PostgreSQL providers, and the one table you must back up. - [PlanetScale Postgres](https://register.accquix.com/self-hosting/planetscale): Run the register on PlanetScale Postgres: the role, pg_strict, connection strings, sizes measured on the real data, and online resizing. ## Project - [Data and privacy](https://register.accquix.com/project/data-and-privacy): The licences of the data, the attribution they require, and your duties as the controller of your copy. - [Contributing](https://register.accquix.com/project/contributing): How to build, test and propose changes, with the rules that keep the project correct. ## Changelog - [Development preview](https://register.accquix.com/changelog/2026-11-10-development-preview): The first working version, before any release. Not for production use yet. ## Reference - [Accquix Register API](https://register.accquix.com/reference): Search and lookup of Slovak business register data (RPO and the Financial Administration lists). Search proposes; only an exact identifier resolves. Data: RPO… ### Search - [Search by name or identifier](https://register.accquix.com/reference/search/search): One box: an identifier gives an exact match; anything else is a name search… Reference for the GET /v1/search endpoint in the Accquix Register API. ### Lookup - [Look up by IČO, DIČ or IČ DPH](https://register.accquix.com/reference/lookup/lookup): Sections identity (RPO), tax, vat and risk (Financial Administration lists), each… Reference for the GET /v1/lookup/{id} endpoint in the Accquix Register API. - [Look up up to 100 identifiers](https://register.accquix.com/reference/lookup/lookup-batch): fields=versions returns only the section versions, for daily change checks. Reference for the POST /v1/lookup:batch endpoint in the Accquix Register API. ### Service - [What this instance offers](https://register.accquix.com/reference/service/capabilities): What this instance offers. Reference for the GET /v1/capabilities endpoint in the Accquix Register API. - [Data freshness per source](https://register.accquix.com/reference/service/sources): Data freshness per source. Reference for the GET /v1/sources endpoint in the Accquix Register API. ## Slovenčina ### Docs - [Accquix Register](https://register.accquix.com/sk): Vlastná prehľadávateľná kópia slovenských obchodných registrov s malým API na vyhľadávanie a overenie. Open source, prevádzka na vlastnej infraštruktúre, bez predplatného. - [Rýchly štart](https://register.accquix.com/sk/quickstart): Spustite Accquix Register cez docker compose, počkajte na prvú synchronizáciu a pošlite prvé vyhľadávanie a overenie. ### Princípy - [Ako to funguje](https://register.accquix.com/sk/concepts/how-it-works): Zdroje, synchronizácia, ktorá ich zrkadlí, vyhľadávacia vrstva a API, ktoré ich sprístupňuje. - [Subjekty a identifikátory](https://register.accquix.com/sk/concepts/subjects): Jeden subjekt na IČO so všetkými zápismi, ako sa porovnávajú identifikátory a zvláštnosti zdrojových dát. - [Ako funguje vyhľadávanie](https://register.accquix.com/sk/concepts/search): Ako funguje predvolené a voliteľné približné vyhľadávanie, ako sa výsledky radia a koľko stoja. - [Aktuálnosť a istota](https://register.accquix.com/sk/concepts/freshness): Stavy častí odpovede, neaktuálne dáta, kedy API povie „nenájdené“ a verzie častí. - [Stav DPH](https://register.accquix.com/sk/concepts/vat): Čo uvádza časť DPH, prečo subjekty podľa §7 a §7a nie sú platiteľmi DPH a ako to uvádzať na dokladoch. ### Práca s API - [Overenie prístupu](https://register.accquix.com/sk/api/authentication): Kľúče API, explicitný anonymný režim a verejné endpointy. - [Vyhľadávanie](https://register.accquix.com/sk/api/search): GET /v1/search na našepkávanie podľa názvu alebo identifikátora a explicitný režim opravy preklepov. - [Overenie subjektu](https://register.accquix.com/sk/api/lookup): GET /v1/lookup/{id} podľa IČO, DIČ alebo IČ DPH a význam jednotlivých častí odpovede. - [Sledovanie zmien](https://register.accquix.com/sk/api/changes): Pomocou POST /v1/lookup:batch a verzií častí denne zistíte, ktorí vaši obchodní partneri sa zmenili. - [Chyby a limity](https://register.accquix.com/sk/api/errors-and-limits): Problémové dokumenty, kódy chýb, limity požiadaviek a časové limity. - [Integrácia do aplikácie](https://register.accquix.com/sk/api/integration): Kontrolný zoznam na použitie registra vo fakturačnej alebo účtovnej aplikácii. - [AI agenti (MCP)](https://register.accquix.com/sk/api/mcp): Pripojte Claude, Cursor a iných MCP klientov k vlastnej inštancii cez MCP endpoint len na čítanie, s rovnakými kľúčmi, limitmi a pravidlami ako REST API. - [Verzie a stabilita](https://register.accquix.com/sk/api/stability): Na čo sa vaša integrácia môže spoľahnúť medzi verziami, čo je nekompatibilná zmena a ako sa zmena ohlasuje. ### Vlastná prevádzka - [Požiadavky](https://register.accquix.com/sk/self-hosting/requirements): Požiadavky na hardvér, databázu a sieť, namerané na reálnych dátach. - [Prevádzka](https://register.accquix.com/sk/self-hosting/operations): Monitorovanie, zablokované zdroje, námietky, aktualizácie a opätovné zostavenie. - [Konfigurácia](https://register.accquix.com/sk/self-hosting/configuration): Všetky príkazy a premenné prostredia. #### Nasadenie - [Docker compose](https://register.accquix.com/sk/self-hosting/docker-compose): Referenčné nasadenie, jeho služby, tajomstvá a nastavenia. - [Coolify, Dokploy a podobné](https://register.accquix.com/sk/self-hosting/paas): Nasadenie na platforme, ktorá spúšťa Docker Compose z Git repozitára, so všetkými tajomstvami v nastaveniach prostredia platformy. - [AWS](https://register.accquix.com/sk/self-hosting/aws): Referenčné rozloženie na ECS Fargate s RDS for PostgreSQL a nástrahy špecifické pre AWS. - [Iné platformy](https://register.accquix.com/sk/self-hosting/platforms): Spustenie obrazu na ľubovoľnej platforme s trvalým kontajnerom a plánovanou úlohou. #### Databáza - [Databáza](https://register.accquix.com/sk/self-hosting/database): Roly, spojenia, spravované PostgreSQL a jediná tabuľka, ktorú musíte zálohovať. - [PlanetScale Postgres](https://register.accquix.com/sk/self-hosting/planetscale): Register na PlanetScale Postgres: rola, pg_strict, connection stringy, veľkosti namerané na reálnych dátach a zmena veľkosti za chodu. ### Projekt - [Dáta a súkromie](https://register.accquix.com/sk/project/data-and-privacy): Licencie dát, uvedenie zdroja, ktoré vyžadujú, a vaše povinnosti prevádzkovateľa vlastnej kópie. - [Ako prispieť](https://register.accquix.com/sk/project/contributing): Ako zostaviť, otestovať a navrhnúť zmeny, a pravidlá, ktoré udržia projekt správny. ### Changelog - [Vývojová verzia](https://register.accquix.com/sk/changelog/2026-11-10-development-preview): Prvá funkčná verzia pred akýmkoľvek vydaním. Zatiaľ nie na produkčné použitie. ## RSS Feeds - [Accquix Register — Changelog](https://register.accquix.com/changelog/rss.xml) ## Agent skills - [accquix-register](https://register.accquix.com/.well-known/agent-skills/accquix-register/SKILL.md): Read the Accquix Register docs instead of answering from memory. Self-hosted search and lookup API for Slovak business register data: the Register of Legal Entities and the Financial Administration lists, mirrored into your PostgreSQL. Use when a task involves Accquix Register: how it works, how to set it up or configure it, or its API. ## Agent resources - [llms-full.txt](https://register.accquix.com/llms-full.txt): The full Markdown of every page in one file. - [Page Markdown](https://register.accquix.com/index.md): Append `.md` to any page URL to fetch that page as raw Markdown. - [JSON API](https://register.accquix.com/api/docs/pages.json): Page index of the JSON docs API; each entry links the page's JSON and Markdown forms. Described by the OpenAPI document at https://register.accquix.com/openapi.json. - [Agent skills](https://register.accquix.com/.well-known/agent-skills/index.json): Agent Skills discovery index of the skills this site publishes. - [API catalog](https://register.accquix.com/.well-known/api-catalog): RFC 9727 linkset of the APIs documented here. - [AI catalog](https://register.accquix.com/.well-known/ai-catalog.json): ARD manifest of the agent-facing resources on this site (MCP server, skills, APIs). - [agent-readability.json](https://register.accquix.com/agent-readability.json): Manifest of every agent-facing artifact on this site. - [Sitemap](https://register.accquix.com/sitemap.xml): Every indexable page URL with its last-modified date.