ToolVet
74trust / 100

Invoice Check

by German Invoice Details Check in Markets & finance

x402 APIPassing, checked 20 min ago

Checks a German invoice (Rechnung) for the ten mandatory details of § 14 (4) UStG, the German VAT act, from caller-supplied invoice text. If a total up to 250 EUR is detectable, the small-amount simplifications (Kleinbetragsrechnung, § 33 UStDV) apply and dispensable details come back as not_applicable, not as a defect. Also states whether a structured e-invoice format (XRechnung/CII, UBL, ZUGFeRD) is present: a format finding only, no claim about any duty or deadline. No tax advice.

POST
https://api.ozdreamtools.de/api/invoice/check
Price
$0.1
per call in USDC
Uptime
97.2%
last 30 days
Response time
527 ms
916 ms slowest 5%
Last check
Passed
20 min ago, next in 12 min

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/invoice/check

Each call costs $0.1 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/invoice/check
content-type: application/json

{
  "text": "Muster GmbH, Musterstr. 1, 65812 Bad Soden · Rechnung Nr. 2026-014 vom 23.07.2026 · Leistungsempfänger: Beispiel AG, Beispielweg 2, 60313 Frankfurt · Leistungsdatum: 20.07.2026 · 3 Std. Beratung · Netto 300,00 EUR · 19% USt 57,00 EUR · Gesamt 357,00 EUR · USt-IdNr: DE123456789"
}

Parameters

ParameterTypeRequiredDescription
textstringYesInvoice text, HTML or XML of an invoice

Example response

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

Example response, 36 lines
{
  "checked_at": "2026-07-23T09:00:00.000Z",
  "e_invoice": {
    "format_detected": "no_structured_format",
    "note": "…"
  },
  "items": [
    {
      "conditional": false,
      "facts": {},
      "key": "name_address",
      "status": "ok",
      "ustg": "§ 14 Abs. 4 Nr. 1"
    }
  ],
  "legal_basis": {
    "note": "…",
    "sources": [
      "https://www.gesetze-im-internet.de/ustg_1980/__14.html"
    ]
  },
  "not_applicable": [
    "credit_note"
  ],
  "not_decidable": [],
  "score": {
    "hint": "…",
    "max": 16,
    "points": 16
  },
  "small_amount_invoice": {
    "amount_eur": 357,
    "detected": false,
    "note": "…"
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.1.

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/invoice/check' \
  -H 'content-type: application/json' \
  --data-raw '{"text":"Muster GmbH, Musterstr. 1, 65812 Bad Soden \u00b7 Rechnung Nr. 2026-014 vom 23.07.2026 \u00b7 Leistungsempf\u00e4nger: Beispiel AG, Beispielweg 2, 60313 Frankfurt \u00b7 Leistungsdatum: 20.07.2026 \u00b7 3 Std. Beratung \u00b7 Netto 300,00 EUR \u00b7 19% USt 57,00 EUR \u00b7 Gesamt 357,00 EUR \u00b7 USt-IdNr: 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/invoice/check' \
  -H 'content-type: application/json' \
  --data-raw '{"text":"Muster GmbH, Musterstr. 1, 65812 Bad Soden \u00b7 Rechnung Nr. 2026-014 vom 23.07.2026 \u00b7 Leistungsempf\u00e4nger: Beispiel AG, Beispielweg 2, 60313 Frankfurt \u00b7 Leistungsdatum: 20.07.2026 \u00b7 3 Std. Beratung \u00b7 Netto 300,00 EUR \u00b7 19% USt 57,00 EUR \u00b7 Gesamt 357,00 EUR \u00b7 USt-IdNr: 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 $0.1 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.1" });
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 $0.1 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.ozdreamtools.de%2Fapi%2Finvoice%2Fcheck&method=POST
const res = await pay("https://api.ozdreamtools.de/api/invoice/check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "text": "Muster GmbH, Musterstr. 1, 65812 Bad Soden \u00b7 Rechnung Nr. 2026-014 vom 23.07.2026 \u00b7 Leistungsempf\u00e4nger: Beispiel AG, Beispielweg 2, 60313 Frankfurt \u00b7 Leistungsdatum: 20.07.2026 \u00b7 3 Std. Beratung \u00b7 Netto 300,00 EUR \u00b7 19% USt 57,00 EUR \u00b7 Gesamt 357,00 EUR \u00b7 USt-IdNr: 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 $0.1 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.1"})
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/invoice/check",
        json={
            "text": "Muster GmbH, Musterstr. 1, 65812 Bad Soden \u00b7 Rechnung Nr. 2026-014 vom 23.07.2026 \u00b7 Leistungsempf\u00e4nger: Beispiel AG, Beispielweg 2, 60313 Frankfurt \u00b7 Leistungsdatum: 20.07.2026 \u00b7 3 Std. Beratung \u00b7 Netto 300,00 EUR \u00b7 19% USt 57,00 EUR \u00b7 Gesamt 357,00 EUR \u00b7 USt-IdNr: DE123456789",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

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20 min agoPassed402191 ms$0.1
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3 days agoPassed402498 ms$0.1