# KiHustle German USt-IdNr Format Checker

> KiHustle 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 matches the expected format of a German VAT identification number (USt-IdNr / Umsatzsteuer-Identifikationsnummer)

## Facts

- Endpoint: POST https://kihustle.tech/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/kihustle-german-ust-idnr-format-checker-a0703e81
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SGB0rdRLOFXGtg-5m9xKH

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 kihustle-german-ust-idnr-format-checker-a0703e81 -d '<json body>'
```

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

## When to prefer this

Use this endpoint when you need a lightweight, low-cost format check specifically for German USt-IdNr strings, without performing a live VIES registry lookup. Ideal for pre-validation in invoicing, onboarding, or data-cleaning pipelines where catching obviously malformatted IDs early matters.

## Known failure modes

- Empty or missing text field returns an error or unexpected result
- Non-string input types may cause parsing failures
- Ambiguous input (e.g. partial numbers) may return inconclusive results
- Service may not distinguish format-valid but fake numbers from real registered ones

## 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

A JSON response indicating whether the submitted text matches the expected format of a German USt-IdNr (VAT ID), with a result field (e.g. 'processed') and a status field (e.g. 'success') confirming whether the format check passed or failed.

## 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/kihustle-german-ust-idnr-format-checker-a0703e81/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)