# Saylor Innovations Czech Business Register (ARES) Lookup

> Saylor Innovations Czech Business Register (ARES) Lookup is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-27).

Looks up Czech company data from the ARES register by IČO number, returning legal name, address, VAT ID, founding date, NACE activity codes, tax office code, and active status

## Facts

- Endpoint: GET https://saylorinnovations.com/api/business/czech?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-czech-business-register-ares-lookup-2fe979f1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GbYbtS0Z2hhLaI_AUEjIU

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 saylor-innovations-czech-business-register-ares-lookup-2fe979f1
```

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

## When to prefer this

Use this endpoint when you need authoritative Czech company data sourced directly from the ARES government register. Prefer it for KYB/KYC workflows, invoice validation, supplier onboarding, or any compliance check specifically involving Czech legal entities identified by their 8-digit IČO number. This is specialized for Czech Republic and not suitable for companies in other jurisdictions.

## Known failure modes

- Invalid or non-existent IČO returns zero results in the companies array
- Malformed IČO (not 8 digits) may return an error or empty result
- Company with no VAT registration returns null vat_id
- Recently dissolved companies may show active:false with an ended date
- Data may lag behind real-time ARES updates due to caching

## How this service works

Czech company register (ARES) lookup by IČO number or name - legal name, address, VAT ID, founding date, NACE activity codes, tax office and active status

## Output

Returns a JSON object with the total number of matching companies and an array of company records, each containing: IČO, legal name, registered city and address, VAT ID, NACE industry codes, founding date, end date (null if active), active boolean flag, legal form code, tax office code, data source label, and last data update timestamp.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "ico"
     ],
     "properties": {
      "ico": {
       "type": "string",
       "description": "8-digit IČO company number"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "total",
      "companies"
     ],
     "properties": {
      "match": {
       "type": "string",
       "description": "How the company was found: IČO or name search"
      },
      "total": {
       "type": "number",
       "description": "Total number of matching items"
      },
      "source": {
       "type": "string",
       "description": "Data source the values come from"
      },
      "companies": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "ico": {
          "type": [
           "string",
           "null"
          ],
          "description": "Czech company identification number (IČO)"
         },
         "city": {
          "description": "City"
         },
         "nace": {
          "type": [
           "array",
           "null"
          ],
          "description": "NACE industry codes"
         },
         "name": {
          "description": "Name"
         },
         "ended": {
          "description": "Date the company ended, null when active"
         },
         "active": {
          "type": [
           "boolean",
           "null"
          ],
          "description": "True when the company is active"
         },
         "vat_id": {
          "description": "Vat id identifier"
         },
         "address": {
          "description": "Account or contract address"
         },
         "founded": {
          "type": [
           "string",
           "null"
          ],
          "description": "Founding date"
         },
         "data_updated": {
          "description": "Data updated"
         },
         "legal_form_code": {
          
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-czech-business-register-ares-lookup-2fe979f1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)