# German USt-IdNr Format Checker

> German USt-IdNr Format Checker is a paid API for AI agents from kihustle.tech, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Validates whether a given text string conforms to the German USt-IdNr (Umsatzsteuer-Identifikationsnummer / VAT ID) format

## Facts

- Endpoint: POST https://kihustle.tech/nexus/api/v1/de-ustid-format-check
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/german-ust-idnr-format-checker-15783add
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yfS0LHAWIU_UFzrOGBVmK

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 german-ust-idnr-format-checker-15783add -d '<json body>'
```

Example prompt: Can you check whether 'DE123456789' is a correctly formatted German USt-IdNr (VAT ID)?

## When to prefer this

Use this endpoint when you specifically need to check whether a string conforms to the German USt-IdNr (DE VAT ID) format as a lightweight, low-cost pre-validation step before submitting to official VIES or Bundeszentralamt für Steuern verification services. It is not a live registry lookup — it only checks the format pattern.

## Known failure modes

- Missing or empty 'text' field returns an error or ambiguous result
- Non-string input may cause a processing error
- Network timeout on the kihustle.tech host
- Ambiguous response schema — 'processed'/'success' may not distinguish format-valid vs format-invalid cases clearly

## How this service works

Kostenlose Guides, Solo-Playbooks und Artikel zu KI, Automation und Side Hustles — für Menschen, die mit echten Systemen online Einkommen aufbauen wollen. Transparent finanziert über faire Affiliate-Links.

## Output

Returns a JSON object indicating whether the submitted text was processed and whether it conforms to the German USt-IdNr format, with a result field and a success/failure status field.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": "processed",
  "status": "success"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/german-ust-idnr-format-checker-15783add/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kihustle.tech](https://www.zero.xyz/host/kihustle.tech/llms.txt)