# Formwerk – Pixel Form Count Checker

> Formwerk – Pixel Form Count Checker 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).

Counts the number of HTML forms contained within a tracking pixel object at a given URL, optionally scoped by CSS selector.

## Facts

- Endpoint: POST https://formwerk.halowerk.com/v1/pruef/formwerk/formularzahl/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-form-count-checker-28178c86
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dFKD20R-1z_JY_GTl16dG

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-form-count-checker-28178c86 -d '<json body>'
```

Example prompt: Check the tracking pixel at https://pixel.example.com/track.gif and tell me how many HTML forms it contains — use the CSS selector #pixel-container if the element isn't unique on the page.

## When to prefer this

Use this endpoint when you specifically need to count the number of HTML forms embedded within a tracking pixel object at a URL, particularly during privacy/compliance audits or when investigating whether pixel endpoints carry form payloads. Prefer sibling endpoints for form method detection or submission-domain analysis.

## Known failure modes

- URL is not publicly accessible — returns error or empty result
- CSS selector matches no element or multiple elements (first match used)
- Pixel URL returns non-HTML content that cannot be parsed for forms
- Network timeout or unreachable host
- Malformed URL input — validation error
- URL exceeds maximum length of 2048 characters

## How this service works

Prüft am Objekt pixel den Befund Zahl enthaltener Formulare.

## Output

Returns the number (count) of HTML forms found within the pixel object at the specified URL, optionally filtered to a specific element via CSS selector. Provides a numeric finding (Befund: Zahl enthaltener Formulare) for the 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/formwerk-pixel-form-count-checker-28178c86/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)