# HALOWERK formwerk – Eingabefeld Datenfelder-Zahl

> HALOWERK formwerk – Eingabefeld Datenfelder-Zahl 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).

Checks a web page's input field element and returns the count of data fields transmitted by that form input.

## Facts

- Endpoint: POST https://formwerk.halowerk.com/v1/pruef/formwerk/datenfelder/eingabefeld?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-eingabefeld-datenfelder-zahl-0ce870d7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_w2fgbkju8ciHAU73Xy4g_

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-eingabefeld-datenfelder-zahl-0ce870d7 -d '<json body>'
```

Example prompt: Check the input fields on https://example.com/contact and tell me how many data fields that form's input element transmits when submitted — specifically target the element matching the CSS selector '#email-input'.

## When to prefer this

Use this endpoint when you specifically need to count the number of data fields transmitted by an individual input element on a web page. It is distinct from endpoints that count total forms on a page or check form submission targets — this focuses narrowly on the data field count of a single input element. Ideal for privacy audits, GDPR compliance checks, or verifying that a form input does not transmit unexpected data.

## Known failure modes

- Invalid or unreachable URL returns an error
- CSS selector matches no element or multiple elements (first match used)
- Private or non-public URLs are rejected
- Input URL exceeds 2048 character limit
- Malformed user_agent pattern causes validation error
- Page requires authentication and cannot be accessed
- Dynamic/JavaScript-rendered form fields may not be detected

## How this service works

Prüft am Objekt eingabefeld den Befund Zahl übermittelter Datenfelder.

## Output

Returns the count (number) of data fields transmitted by the specified input field element on the target web page, along with inspection metadata about the form element and its submission behavior.

## 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-eingabefeld-datenfelder-zahl-0ce870d7/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)