# HALOWERK formwerk – Cookie-Pixel-Prüfung

> HALOWERK formwerk – Cookie-Pixel-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).

Checks a given web URL or pixel object and returns the count of cookies set by that pixel/tracker.

## Facts

- Endpoint: POST https://formwerk.halowerk.com/v1/pruef/formwerk/cookie/pixel?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-cookie-pixel-pr-fung-721d670c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jBAEXvYPF1BoizkM90WMO

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-cookie-pixel-pr-fung-721d670c -d '<json body>'
```

Example prompt: Can you check how many cookies are set by the tracking pixel on https://example.com and give me the count?

## When to prefer this

Use this endpoint when you specifically need to count cookies set by a tracking pixel or pixel-like object on a page. It is distinct from general cookie counting for an entire page or for forms, scripts, or iframes — this endpoint targets the pixel object type specifically. Ideal for privacy compliance workflows, GDPR/ePrivacy audits, or verifying third-party pixel behavior.

## Known failure modes

- URL is not publicly accessible — returns an error indicating the target could not be reached
- Invalid or non-matching CSS selector — falls back to first matching element or returns an error
- Malformed URL (missing scheme, too long) — validation error with schema constraint message
- Pixel fires no cookies — returns a count of zero
- Network timeout reaching the target URL — timeout/connection error returned
- Invalid user_agent string not matching allowed pattern — schema validation error

## How this service works

Prüft am Objekt pixel den Befund Zahl gesetzter Cookies.

## Output

Returns the number of cookies set by the pixel object found at the specified URL or CSS-selected element. The response indicates the cookie count (Befund: Zahl gesetzter Cookies) for the inspected pixel target.

## 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-cookie-pixel-pr-fung-721d670c/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)