# HALOWERK formwerk – Formular Datenfelder Prüfung

> HALOWERK formwerk – Formular Datenfelder Prüfung is a paid API for AI agents from formwerk.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-23).

Counts the number of transmitted data fields in an HTML form on a given web page.

## Facts

- Endpoint: POST https://formwerk.halowerk.com/v1/pruef/formwerk/datenfelder/formular?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-formwerk-formular-datenfelder-pr-fung-f49a58f3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QROwocRc3IyJBATccUOjp

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 halowerk-formwerk-formular-datenfelder-pr-fung-f49a58f3 -d '<json body>'
```

Example prompt: Check the form on https://example.com/contact and tell me how many data fields it transmits when submitted.

## When to prefer this

Use this endpoint when you need to programmatically count the number of data fields a web form transmits, for compliance auditing, privacy reviews, or change monitoring. Prefer this over manual inspection or general scraping tools when you need a structured, automated count specifically tied to form submissions rather than all visible inputs.

## Known failure modes

- Target URL is unreachable or returns a non-200 HTTP status
- No form element found at the given URL or CSS selector
- CSS selector matches zero or multiple elements ambiguously
- URL is not publicly accessible (private network, authentication required)
- Malformed or invalid URL provided

## How this service works

Prüft am Objekt formular den Befund Zahl übermittelter Datenfelder.

## Output

Returns the count (number) of data fields transmitted by the specified web form on the target page, allowing agents to audit or verify the scope of data collection.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "ziel": {
   "oneOf": [
    {
     "type": "string",
     "maxLength": 2048,
     "minLength": 1,
     "description": "Öffentliche HTTP(S)-Adresse; bei DNS-Befunden Domain oder öffentliche IP."
    },
    {
     "type": "object",
     "required": [
      "adresse"
     ],
     "properties": {
      "adresse": {
       "type": "string",
       "maxLength": 2048,
       "minLength": 1
      },
      "selektor": {
       "type": "string",
       "maxLength": 240,
       "minLength": 1,
       "description": "CSS-Selektor: genau ein Objekt, sonst erster Treffer des Objektfilters."
      },
      "vergleich": {
       "type": "string",
       "maxLength": 2048,
       "description": "Öffentliche Vergleichsadresse für Link-, Sitemap- oder Sprachbefunde."
      },
      "user_agent": {
       "type": "string",
       "pattern": "^[A-Za-z0-9_-]{1,80}$"
      },
      "dkim_selektor": {
       "type": "string",
       "pattern": "^[A-Za-z0-9_-]{1,63}$"
      }
     },
     "additionalProperties": false
    }
   ]
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-formwerk-formular-datenfelder-pr-fung-f49a58f3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from formwerk.halowerk.com](https://www.zero.xyz/host/formwerk.halowerk.com/llms.txt)