ToolVet
75trust / 100

Vat Format

by EU VAT Number Format Check in Other

x402 APIPassing, checked 3 h ago

Validates the format of an EU VAT number (VAT ID, USt-IdNr, reverse charge) against the European Commission's published format table: 27 member states plus GB and XI. Format only, never validity - no VIES call, and the response says so. Reports every published pattern with its match status, enforces note 4 for ES, honours case sensitivity, and names the source's own contradictions: BE prints two patterns while note 2 denies one, RO prints nine digits while its description allows two to ten.

POST
https://api.ozdreamtools.de/api/vat/format
Price
$0.02
per call in USDC
Uptime
100%
last 30 days
Response time
540 ms
816 ms slowest 5%
Last check
Passed
3 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://api.ozdreamtools.de/api/vat/format

Each call costs $0.02 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://api.ozdreamtools.de/api/vat/format
content-type: application/json

{
  "vat_number": "DE123456789"
}

Parameters

ParameterTypeRequiredDescription
countrystringNoTwo-letter member state prefix, e.g. 'DE' or 'EL'. Optional when the number carries it.
vat_numberstringYesVAT identification number, with or without the country prefix

Example response

The provider's example. We can't check it without paying.

Example response, 61 lines
{
  "checked_at": "2026-07-26T09:00:00.000Z",
  "checks": [
    {
      "findings": 0,
      "key": "format",
      "source": "European Commission, published format per member state",
      "status": "ok"
    }
  ],
  "country": {
    "code": "DE",
    "description": "1 block of 9 digits",
    "in_table": true,
    "in_vies": true
  },
  "findings": [],
  "input": {
    "normalized": "DE123456789",
    "raw": "DE123456789"
  },
  "interpretations": [
    {
      "key": "description_over_pattern",
      "reading": "…"
    }
  ],
  "legend": {
    "9": "A digit",
    "X": "A letter or a digit"
  },
  "not_checked": [
    "…"
  ],
  "patterns": [
    {
      "footnotes": [],
      "matched": true,
      "origin": "pattern",
      "pattern": "DE999999999"
    }
  ],
  "source": {
    "countries": 29,
    "digest": "…",
    "name": "VAT identification number structure, European Commission (VIES FAQ data)",
    "retrieved": "2026-07-26"
  },
  "summary": {
    "errors": 0,
    "infos": 0,
    "warnings": 0
  },
  "unreferenced_notes": [
    {
      "note": 2,
      "text": "…"
    }
  ],
  "valid_format": true
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.ozdreamtools.de/api/vat/format' \
  -H 'content-type: application/json' \
  --data-raw '{"vat_number":"DE123456789"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://api.ozdreamtools.de/api/vat/format' \
  -H 'content-type: application/json' \
  --data-raw '{"vat_number":"DE123456789"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.ozdreamtools.de%2Fapi%2Fvat%2Fformat&method=POST
const res = await pay("https://api.ozdreamtools.de/api/vat/format", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "vat_number": "DE123456789"
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.ozdreamtools.de/api/vat/format",
        json={
            "vat_number": "DE123456789",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

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