# Romanian VAT Number Checksum Validator

> Romanian VAT Number Checksum Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Validates the checksum of a Romanian VAT (CIF/CUI) number without performing a live registry lookup

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-vat-ro?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/romanian-vat-number-checksum-validator-b7372ee7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_T6PH4gLo065vpIURcufWy

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 romanian-vat-number-checksum-validator-b7372ee7 -d '<json body>'
```

Example prompt: Can you check whether the Romanian VAT number RO12345678 has a valid checksum — just the format check, no registry lookup needed?

## When to prefer this

Use this endpoint when you need a fast, cheap ($0.002 USDC) checksum-only validation of a Romanian VAT number and do not require confirmation against the official ANAF registry. Prefer the free sandbox endpoint POST /v1/sandbox/check-vat-ro for testing. Choose this over a full registry lookup when speed and cost matter more than live registration status.

## Known failure modes

- Empty or missing value field returns a validation error
- Value exceeding 20000 characters rejected
- Malformed JSON body causes a 400 error
- Non-Romanian VAT numbers may return invalid even if valid in their own country
- Payment not included or insufficient USDC triggers a 402 Payment Required response

## How this service works

Call when an agent needs whether a RO VAT checksum is valid. No registry lookup. Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/check-vat-ro first.

## Output

Returns a boolean or structured result indicating whether the provided Romanian VAT (CIF/CUI) number has a valid checksum, without querying any official tax authority registry

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "description": "JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN."
  },
  "value": {
   "type": "string",
   "examples": [
    "00000019"
   ],
   "maxLength": 20000,
   "minLength": 1,
   "description": "Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar."
  },
  "schema": {
   "description": "JSON Schema document for schema-check SKUs. Omit it on string checks."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/romanian-vat-number-checksum-validator-b7372ee7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)