# HALOWERK formwerk – Pixel Übermittlung vor Einwilligung Prüfung

> HALOWERK formwerk – Pixel Übermittlung vor Einwilligung 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 whether a tracking pixel on a webpage transmits data before the user has given consent

## Facts

- Endpoint: POST https://formwerk.halowerk.com/v1/pruef/formwerk/vor-einwilligung/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-pixel-bermittlung-vor-einwilligung-pr-fung-b6c71401
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UW6iavY2HLv2VlZREc1Sy

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-pixel-bermittlung-vor-einwilligung-pr-fung-b6c71401 -d '<json body>'
```

Example prompt: Check whether the tracking pixel on https://example.com fires and transmits data before the user has accepted the consent banner — I need to know if it's sending anything pre-consent.

## When to prefer this

Use this endpoint when you need to specifically audit whether a tracking pixel (e.g. Facebook, Google, or custom pixel) sends data to a remote domain before the page visitor has granted consent. Ideal for GDPR/ePrivacy compliance workflows, pre-launch audits, or automated monitoring pipelines focused on pixel-level pre-consent data transmission. Choose this over general cookie scanners when the specific concern is pixel-initiated requests happening before the consent gate.

## Known failure modes

- Target URL is unreachable or returns a non-200 status — endpoint returns an error finding
- URL is not a valid public HTTP/HTTPS address — validation error returned
- CSS selector matches zero elements — first matching element used or error if none found
- No tracking pixel found at the target page — empty or negative finding returned
- Ambiguous or malformed input schema — request rejected with schema validation error

## How this service works

Prüft am Objekt pixel den Befund Übermittlung vor Einwilligung.

## Output

Returns a compliance finding (Befund) indicating whether the pixel object at the target URL transmits data before user consent is given, including details about the transmission status and any pre-consent data leakage detected.

## 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-pixel-bermittlung-vor-einwilligung-pr-fung-b6c71401/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)