# HALOWERK formwerk – Seite Fremddomains-Zählung

> HALOWERK formwerk – Seite Fremddomains-Zählung 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 webpage and returns the count of external (third-party) domains contacted by that page.

## Facts

- Endpoint: POST https://formwerk.halowerk.com/v1/pruef/formwerk/fremddomain/seite?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-seite-fremddomains-z-hlung-6f3eea6b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pjJDMQRQyqkECSc6RGavh

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-seite-fremddomains-z-hlung-6f3eea6b -d '<json body>'
```

Example prompt: Can you scan the page https://example.com and tell me how many external (third-party) domains it contacts when it loads?

## When to prefer this

Use this endpoint when you need a precise, per-page count of external domains contacted during page load — especially for privacy compliance audits, GDPR/ePrivacy assessments, or tracking-reduction verification. Prefer this over generic crawlers when you need a structured numeric finding specifically about third-party domain reach on a single page, with optional CSS-selector scoping.

## Known failure modes

- Invalid or unreachable URL returns an error indicating the target could not be fetched
- Non-public or firewalled URLs result in a connection failure
- Malformed input schema (e.g. empty URL) returns a validation error
- CSS selector matching no element may fall back to first match or return a scoping error
- Rate limiting or payment issues return a 402 or 429 response

## How this service works

Prüft am Objekt seite den Befund Zahl kontaktierter Fremddomains.

## Output

Returns an integer count representing the number of distinct external (foreign) domains contacted by the specified webpage when it is loaded, based on live inspection of the page's network activity.

## 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-seite-fremddomains-z-hlung-6f3eea6b/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)