# agosint EU VAT Number Validation via VIES

> agosint EU VAT Number Validation via VIES is a paid API for AI agents from agosint.shveik.dev, paid per call via x402, $0.015/call, status unknown (last checked 2026-10-14).

Validates an EU VAT number against the official VIES service, returning registration status, registered company name, address, and optional name-match result.

## Facts

- Endpoint: POST https://agosint.shveik.dev/v1/x402/vat?utm_source=zero.xyz
- Price: $0.015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agosint-eu-vat-number-validation-via-vies-b4d2aca6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cT2zNBqkNuh2zMJAOHTME

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 agosint-eu-vat-number-validation-via-vies-b4d2aca6 -d '<json body>'
```

Example prompt: Can you check if EU VAT number CZ45274649 is valid and confirm it belongs to a company named ČEZ?

## When to prefer this

Choose this endpoint when you need authoritative, cryptographically signed VAT validation direct from the EU VIES system, especially in automated KYB/KYC pipelines, invoice processing workflows, or supplier onboarding where you need no-account, pay-per-call verification without managing API subscriptions.

## Known failure modes

- VIES service temporarily unavailable — returns error with source details
- Invalid VAT format — returns error before querying VIES
- VAT number not found in VIES — returns valid: false
- Name mismatch — returns name_match: 'mismatch' when expected_name doesn't match registered name
- Payment failure — x402 payment not confirmed, request rejected

## How this service works

Company and domain due diligence for AI agents: official registers, sanctions lists and domain records, signed. Pay per call in stablecoins, no account.

## Output

Returns a JSON object with: validity boolean, registered company name, registered address, country code, VAT number, source (VIES), timestamp of check, name_match result ('match', 'mismatch', or 'unknown') when expected_name is provided, attribution note, and a payment receipt.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "vat": {
   "type": "string",
   "maxLength": 20
  },
  "expect_name": {
   "type": "string",
   "maxLength": 200
  },
  "requester_vat": {
   "type": "string",
   "maxLength": 20
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "name": "ČEZ, a.…",
  "note": "The resu…",
  "valid": true,
  "number": "45274649",
  "schema": "agosint.…",
  "source": "vies",
  "address": "Duhová 1…",
  "country": "CZ",
  "receipt": {},
  "checked_at": "2026-10-…",
  "name_match": "match",
  "attribution": "Result o…"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agosint-eu-vat-number-validation-via-vies-b4d2aca6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agosint.shveik.dev](https://www.zero.xyz/host/agosint.shveik.dev/llms.txt)