Profile of a Czech company

A country-specific constraint to know before integrating: we serve legal persons only. An IČO identifier can belong to a natural person trading in their own name, and in that case the route refuses — deliberately, because serving a natural person's identity would mean publishing personal data.

See a real response (free) Get the quote for /v1/eu/entreprise/CZ/{id}

What the route returns

Catalogue description, exactly as agents read it:

Official Czech company registry lookup (ARES — register of economic subjects, Ministry of Finance of Czechia). Query: /v1/eu/entreprise/CZ/45274649 (8-digit IČO / ICO identifier). Returns legal name, legal form, normalized status, incorporation date, registered office and the DIČ (DIC) VAT number — Czech company data live from ARES, the official register of companies in Czechia. Unified JSON schema shared by all Sirenic European company profiles.

Expected identifier

Czech IČO identifier. A natural person's IČO is refused.

A wrongly formatted identifier returns 400 and is not billed — but it costs you a round trip. It is the leading cause of failed calls on the foreign routes.

Extract from a genuinely paid response

Dated snapshot from 2026-07-29, truncated to one item per array. It is not live data. The full extract is served free of charge from the samples surface, and the schema from the OpenAPI document.

{
 "pays": "CZ",
 "registre": "ARES — Registr ekonomických subjektů (MF ČR)",
 "id_national": "45274649",
 "denomination": "ČEZ, a. s.",
 "forme_juridique": {
  "code": "121",
  "libelle": null
 },
 "statut": "actif",
 "statut_detail": null,
 "date_creation": "1992-05-06",
 "adresse_siege": {
  "adresse": "Duhová 1444/2, Michle, 14000 Praha 4",
  "code_postal": "14000",
  "ville": "Praha",
  "pays": "CZ"
 },
 "identifiants": {
  "tva": "CZ45274649",
  "lei": null
 },
 "lien_registre": "https://ares.gov.cz/ekonomicke-subjekty?ico=45274649",
 "data_freshness": "ARES temps réel (cache 24 h)",
 "source": "Registres officiels : Brønnøysundregistrene (NO, NLOD), e-Business Register (EE, CC-BY 4.0), Uzņēmumu reģistrs (LV), KBO/BCE (BE), CVR (DK), Companies House (GB, OGL), ARES (CZ), Register právnických osôb (SK, CC-BY 4.0), PRH/YTJ (FI, CC-BY 4.0), Krajowy Rejestr Sądowy (PL), Zefix (CH, OGD), Bolagsverket (SE), GLEIF (CC0)",
 "disclaimer": "Données rediffusées telles que publiées par les registres officiels, dans un schéma unifié ; `statut` est une normalisation en 3 valeurs, le libellé source est conservé dans `statut_detail`. / Official register data as published, unified schema; `statut` is a 3-value normalization."
}

Price and billing

Price: $0.01. The authoritative amount is the one in the 402 quote returned by the route itself — not this text, which derives from the same grid but is still just a page.

An error response cancels the payment: a 400, 404 or 503 is never billed. An upstream outage closes the route with a 503 rather than serving a degraded response.

Calling the route

# 1. Le devis, sans rien payer : la route répond 402 avec son montant
curl -i https://api.sirenic.eu/v1/eu/entreprise/CZ/{id}

# 2. L'appel réglé — le client x402 paie le devis et rejoue la requête
npx x402-fetch https://api.sirenic.eu/v1/eu/entreprise/CZ/{id}

# 3. Ou en MCP, dans Claude Code / Cursor / un agent
claude mcp add --transport http sirenic https://api.sirenic.eu/mcp

What this route does not do

Live query at the register: always current, but dependent on its availability. A register outage returns 503 and the call is not billed — never a degraded response.

Neighbouring routes

• /v1/eu/entreprise/CZ/{ico}/insolvabilite — $0.02
• /v1/eu/recherche — $0.003

How you pay

Every route is paid per call, in USDC or EURC on the Base network, over the x402 protocol: no account to create, no API key, no subscription. The first call returns a 402 quote your client settles, then replays the call. A failed call is never billed.

Would you rather have a euro invoice and prepaid credits? That is in preparation, and we will not announce a date until it is open. Write to contact@sirenic.eu and we will let you know when it opens.

Paid responses are Ed25519-signed: you can later prove what was served to you, and when. The whole catalogue is free to read in the OpenAPI document and in llms.txt.

One call, end to end

# Client x402 (npm) — le devis 402 est réglé et l'appel rejoué automatiquement
npx x402-fetch https://api.sirenic.eu/v1/entreprise/552032534

# Ou en MCP, dans Claude Code / Cursor
claude mcp add --transport http sirenic https://api.sirenic.eu/mcp

Routes used and pricing

Take it further

No account to create, no key to request: the first step is free and shows you exactly what you would be buying.

See a real response (free) Get the quote for /v1/eu/entreprise/CZ/{id} Get notified about euro packs

Read next

• Querying European company registers