# agosint VAT Number Validation and Company Lookup

> agosint VAT Number Validation and Company Lookup 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 a VAT number against official EU registers (VIES) and returns company name, address, registration number, and optional name-match verification, signed with a receipt.

## Facts

- Endpoint: POST https://agosint.shveik.dev/v1/mpp/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-vat-number-validation-and-company-lookup-de5b8172
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nM5OP8w8HH679SFclIXB3

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-vat-number-validation-and-company-lookup-de5b8172 -d '<json body>'
```

Example prompt: Can you validate the VAT number CZ45274649 and confirm it belongs to a company called ČEZ? I'm doing a supplier check before we process their invoice.

## When to prefer this

Use this endpoint when you need a fast, per-call VAT number validation against EU VIES with optional company name matching and a signed receipt — ideal for automated KYB, invoice compliance, and supplier onboarding workflows where you do not want to manage subscriptions or accounts. Prefer this over manual VIES lookups when you need machine-readable results with audit trails in an agent workflow.

## Known failure modes

- Invalid or malformed VAT number format — returns validation error
- VAT number not found in VIES registry — valid:false with no company data
- VIES service temporarily unavailable — upstream timeout or error propagated
- Name mismatch when expect_name is provided — valid:true but name_match:'mismatch'
- Rate or payment failure — x402 payment not accepted or insufficient USDC

## 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 the company's registered name, address, country, registration number, VAT validity boolean, the data source (e.g. VIES), the timestamp of the check, an optional name_match field ('match'/'mismatch'/'unknown') if an expected name was provided, attribution text, and a signed receipt for audit purposes.

## 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-vat-number-validation-and-company-lookup-de5b8172/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)