# Formwerk Page Field Label Inspector

> Formwerk Page Field Label Inspector is a paid API for AI agents from formwerk.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Checks a web page object for the presence and properties of field labels on forms.

## Facts

- Endpoint: POST https://formwerk.halowerk.com/v1/pruef/formwerk/label/seite
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/formwerk-page-field-label-inspector-0fa23d0a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_slAf-8iGjTNCCBxDcKS2S

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-page-field-label-inspector-0fa23d0a -d '<json body>'
```

Example prompt: Can you check whether the form fields on https://example.com/contact have proper labels applied to them?

## When to prefer this

Choose this endpoint when you specifically need to verify whether form field labels exist and are properly associated on a web page. It is optimized for label-specific form inspection rather than general page scraping or full accessibility audits. Prefer it over generic HTML extractors when the task is narrowly about form label presence.

## Known failure modes

- Invalid or unreachable URL returns an error or empty finding
- URL resolves to a non-HTML resource (e.g. PDF, image) and cannot be inspected
- CSS selector matches no elements, returning no result or first-match fallback
- Private/internal URLs that are not publicly accessible cannot be fetched
- Malformed input schema causes a 400-level validation error

## How this service works

Prüft am Objekt seite den Befund vorhandene Feldbeschriftung.

## Output

The endpoint returns a finding (Befund) about the presence and status of field labels on the targeted page object, indicating whether form fields have associated labels and any relevant details about those labels.

## 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-page-field-label-inspector-0fa23d0a/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)