# bau.halowerk.com – Meta-Beschreibung Prüfung

> bau.halowerk.com – Meta-Beschreibung Prüfung is a paid API for AI agents from bau.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-23).

Checks whether an article/object on a given URL has a valid meta description tag present

## Facts

- Endpoint: POST https://bau.halowerk.com/v1/pruef/bau/beschreibung/artikel?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/bau-halowerk-com-meta-beschreibung-pr-fung-8a6ec97b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nT_bA5wWrG_jqq7y97a85

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 bau-halowerk-com-meta-beschreibung-pr-fung-8a6ec97b -d '<json body>'
```

Example prompt: Check whether the article at https://example.com/blog/my-post has a meta description tag — use the CSS selector 'article.main' to focus on the article element.

## When to prefer this

Use this endpoint when you need to specifically validate the presence of a meta description tag on an article or content object on a given public URL, particularly for SEO auditing or content quality checks on German-language or European web properties. Prefer this over generic HTML scrapers when you want a structured pass/fail finding rather than raw HTML extraction.

## Known failure modes

- URL is not publicly accessible or returns non-200 status
- CSS selector matches zero elements — first matching element used as fallback
- Malformed or overly long URL (exceeds 2048 characters) causes rejection
- Page blocks crawlers or returns empty body
- Invalid CSS selector syntax causes parsing failure

## How this service works

Prüft am Objekt artikel den Befund vorhandene Meta-Beschreibung.

## Output

Returns a validation finding (Befund) indicating whether a meta description is present on the targeted article object at the given URL, potentially scoped to a specific CSS selector element.

## 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/bau-halowerk-com-meta-beschreibung-pr-fung-8a6ec97b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bau.halowerk.com](https://www.zero.xyz/host/bau.halowerk.com/llms.txt)