# Czech ARES Company Lookup

> Czech ARES Company Lookup is a paid API for AI agents from agentdata-api.sander-van-aard.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Looks up official Czech company data from the ARES register (Ministry of Finance) by ICO number or company name

## Facts

- Endpoint: POST https://agentdata-api.sander-van-aard.workers.dev/cz/company
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/czech-ares-company-lookup-650cb9c7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FEX8p6Drfqcv-oolJ1IqV

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-ares-company-lookup-650cb9c7 -d '<json body>'
```

Example prompt: Can you look up the Czech company with ICO 27082440 in the ARES register and tell me its official name, VAT number, registered address, and whether it's still active?

## When to prefer this

Use this endpoint when you need authoritative, official Czech company data directly from the government ARES register. Prefer this over scraping or third-party business databases when you need legally reliable information such as VAT numbers, legal form codes, or establishment/termination dates for Czech entities. Ideal for KYC, supplier verification, or invoice validation workflows involving Czech companies.

## Known failure modes

- ICO not found in ARES register — company does not exist or number is incorrect
- Name search returns zero candidates — no matching companies found
- Name search is ambiguous — up to 5 candidates returned, agent must disambiguate
- Company found but has no VAT number (DIC) — not VAT registered
- ARES service temporarily unavailable — upstream dependency failure
- Invalid ICO format — malformed input number

## How this service works

Official Czech company check from the ARES register (Ministry of Finance, open data). Look up by ICO (exact) or search by name (up to 5 candidates). Returns official name, legal form code, VAT number (DIC), establishment and termination dates, registered address and NACE activity codes, with a direct ARES link. Companies only.

## Output

Returns the company's official name, legal form code, VAT number (DIC), establishment and termination dates, registered address, NACE activity codes, and a direct link to the ARES record. When searching by name, returns up to 5 matching candidates.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    }
   },
   "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-ares-company-lookup-650cb9c7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentdata-api.sander-van-aard.workers.dev](https://www.zero.xyz/host/agentdata-api.sander-van-aard.workers.dev/llms.txt)