# Formwerk Pixel Submission Target Domain Check

> Formwerk Pixel Submission Target Domain Check is a paid API for AI agents from formwerk.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-16).

Checks the target domain (Zieldomain) of the submission for a tracking pixel object on a given webpage.

## Facts

- Endpoint: POST https://formwerk.halowerk.com/v1/pruef/formwerk/ziel/pixel
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/formwerk-pixel-submission-target-domain-check-784f42d8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gfn6gqb9O4Uz1F5JkKXL3

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 formwerk-pixel-submission-target-domain-check-784f42d8 -d '<json body>'
```

Example prompt: Can you check what domain the tracking pixel on https://example.com/landing is submitting data to? Use the CSS selector '#track-pixel' to target it specifically.

## When to prefer this

Use this endpoint when you specifically need to determine where a tracking pixel on a webpage submits data — i.e., the pixel's submission target domain. It is distinct from sibling endpoints that check banner or iframe submission domains, or that audit form counts, form methods, or cookie targets. Choose this when the object of interest is a pixel element and the concern is where it reports data.

## Known failure modes

- Invalid or inaccessible URL returns an error (non-public or non-HTTP(S) address)
- CSS selector matches no element or multiple elements (first match used)
- Pixel element has no detectable submission target domain (no finding returned)
- URL exceeds maximum length of 2048 characters
- Page blocks automated access (403/401 responses)
- Timeout if the target URL is unreachable

## How this service works

Prüft am Objekt pixel den Befund Zieldomain der Übermittlung.

## Output

Returns a structured finding (Befund) identifying the target domain (Zieldomain) to which the pixel object on the inspected page transmits or submits data, allowing verification of whether pixel tracking goes to an expected or unauthorized third-party domain.

## 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/formwerk-pixel-submission-target-domain-check-784f42d8/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)