# Czech Business Register Lookup (ARES)

> Czech Business Register Lookup (ARES) is a paid API for AI agents from data.greeneris.io, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Looks up Czech companies in the official ARES register by name or ICO number, returning legal identity, VAT number, address, NACE codes, and registration status.

## Facts

- Endpoint: GET https://data.greeneris.io/v1/cz/company
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/czech-business-register-lookup-ares-5b345389
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ROoKNjYKtTKdZoUJMqu-U

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability czech-business-register-lookup-ares-5b345389
```

Example prompt: Can you look up the Czech company Škoda Auto in the official ARES register and give me their ICO, VAT number, registered address, and current registration status?

## When to prefer this

Use this endpoint when you need to verify or enrich data about a Czech-registered company using official government sources. Ideal for KYC/AML workflows, supplier verification, VAT number cross-checking via EU VIES, or any business compliance task involving Czech entities. Prefer over generic web search when authoritative, structured, GDPR-compliant legal data is required.

## Known failure modes

- No company found matching the query name or ICO — empty results array returned
- Invalid ICO format (not 8 digits) — validation error
- Limit parameter out of range (not 1–10) — parameter error
- ARES upstream registry temporarily unavailable — service error or stale cache returned
- Ambiguous company name returns multiple results — agent must select the correct match

## How this service works

Official Czech business register lookup via ARES (Ministry of Finance, ares.gov.cz). Query: ?q=skoda or ?q=00177041 (company name or 8-digit ICO), optional limit (1-10). Returns ICO, DIC (CZ VAT number, cross-checkable in EU VIES), legal form, registered address, NACE activity codes, per-register status (commercial, trade, VAT) and creation date. Company data only, personal data stripped (GDPR). 24h cache.

## Output

Returns a list of matching Czech companies (up to the specified limit) each with: ICO (company ID), DIC (Czech VAT/EU VIES-compatible number), legal form, registered address, NACE economic activity codes, per-register status (commercial register, trade register, VAT register), and company creation date. Personal data is stripped for GDPR compliance. Data is cached for 24 hours.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "description": "Company name or ICO (8-digit Czech company id)"
      },
      "limit": {
       "type": "integer",
       "default": 3,
       "description": "Max results (1-10)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/czech-business-register-lookup-ares-5b345389/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from data.greeneris.io](https://www.zero.xyz/host/data.greeneris.io/llms.txt)