# Finnish VAT Number Validator (ALV)

> Finnish VAT Number Validator (ALV) is a paid API for AI agents from vat.openverbs.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-14).

Validates a Finnish VAT (ALV) number by checking it against the PRH/YTJ Tax Administration VAT register to confirm the entity exists and holds a live VAT registration.

## Facts

- Endpoint: POST https://vat.openverbs.com/v1/finland
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/finnish-vat-number-validator-alv-ad62fd85
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wwGIN5l9fnwZSMrBbiXA-

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 finnish-vat-number-validator-alv-ad62fd85 -d '<json body>'
```

Example prompt: Can you check whether FI12345678 is a valid, active Finnish VAT number — I need to confirm this supplier is registered in the Finnish Tax Administration VAT register before I process their invoice.

## When to prefer this

Use this endpoint when you specifically need to validate a Finnish VAT (ALV) number against the official Finnish Tax Administration register via PRH/YTJ. Choose this over generic EU VIES lookups when you need authoritative Finnish-specific data directly from the source registry, or when VIES coverage for Finland is insufficient. Ideal for automating B2B compliance checks, vendor onboarding, and invoice validation workflows involving Finnish entities.

## Known failure modes

- Invalid format: VAT number does not match FI + 8-digit pattern
- Number not found: entity does not exist in the PRH/YTJ registry
- Entity exists but not VAT registered: company exists but has no live VAT register entry
- Network or upstream API error: PRH/YTJ open data API unavailable
- Payment failure: x402 payment not processed, request rejected

## How this service works

Validate a Finnish VAT (ALV) number against the official VAT register. Validity means the entity exists and holds a live registration.

## Output

A response indicating whether the Finnish VAT number is valid — meaning the entity exists in the PRH/YTJ Business Information System and holds a live entry in the Finnish Tax Administration VAT register. Returns validity status and likely basic entity details if registered.

## 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",
     "required": [
      "vatNumber"
     ],
     "properties": {
      "vatNumber": {
       "type": "string",
       "maxLength": 20,
       "minLength": 8,
       "description": "Finnish VAT/ALV number — \"FI\" + the 8-digit Business ID (Y-tunnus). A leading \"FI\" and the \"1234567-8\" hyphen form are tolerated."
      }
     },
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/finnish-vat-number-validator-alv-ad62fd85/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from vat.openverbs.com](https://www.zero.xyz/host/vat.openverbs.com/llms.txt)