# HALOWERK formwerk – Fremddomain-Zählung im Formular

> HALOWERK formwerk – Fremddomain-Zählung im Formular 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 form (HTML form object) and returns the count of contacted external/third-party domains.

## Facts

- Endpoint: POST https://formwerk.halowerk.com/v1/pruef/formwerk/fremddomain/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-fremddomain-z-hlung-im-formular-047d17b3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Vd-r8U6yHNLbS-S2-oOSr

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-fremddomain-z-hlung-im-formular-047d17b3 -d '<json body>'
```

Example prompt: Can you check the contact form on https://example.com/contact and tell me how many third-party domains it reaches out to?

## When to prefer this

Choose this endpoint when you need to quantify how many distinct third-party/foreign domains a specific HTML form on a page contacts — useful for GDPR audits, privacy assessments, or security reviews of web forms. Prefer it over general link-analysis endpoints when the focus is specifically on form elements and their external domain exposure.

## Known failure modes

- Invalid or unreachable URL returns an error
- CSS selector matches no element or multiple elements (first match used)
- Page blocks crawling or requires authentication
- Form uses JavaScript-only submission that cannot be statically analyzed
- Network timeout when fetching the target URL

## How this service works

Prüft am Objekt formular den Befund Zahl kontaktierter Fremddomains.

## Output

Returns a numeric finding (Befund) indicating the count of external/foreign domains (Fremddomains) contacted by the identified form element on the given page. May include the specific domains found as part of the audit result.

## 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-fremddomain-z-hlung-im-formular-047d17b3/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)