# Crawlspur Meta-Robots Canonical Checker

> Crawlspur Meta-Robots Canonical Checker is a paid API for AI agents from crawlspur.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Checks the meta-robots directive value on a canonical URL object for SEO crawlability analysis

## Facts

- Endpoint: POST https://crawlspur.halowerk.com/v1/pruef/crawlspur/meta-robots/canonical
- 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/crawlspur-meta-robots-canonical-checker-8594db1f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0blYBr3iBGOxsaWqqUglO

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 crawlspur-meta-robots-canonical-checker-8594db1f -d '<json body>'
```

Example prompt: Check the meta-robots tag value on the canonical URL https://example.com/my-page and tell me what directive is set — I want to know if search engines are being told to index or noindex it.

## When to prefer this

Use this endpoint when you specifically need to verify the meta-robots directive on a canonical page object, particularly for technical SEO audits where canonical tag and robots meta tag alignment matters. Prefer this over generic crawl tools when you need a structured, per-field finding focused on the canonical object's meta-robots value, especially in automated SEO monitoring pipelines.

## Known failure modes

- URL is not publicly accessible or returns non-200 HTTP status
- Target URL has no meta-robots tag present
- URL is malformed or exceeds 2048 character limit
- CSS selector matches no element or matches multiple elements
- Network timeout fetching the target URL
- Invalid user agent string format

## How this service works

Prüft am Objekt canonical den Befund Wert der Meta-Robots-Angabe.

## Output

Returns the finding for the meta-robots directive value found on the canonical object at the specified URL, indicating what instruction (e.g. index, noindex, follow, nofollow, or combinations) is present in the meta robots tag.

## 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/crawlspur-meta-robots-canonical-checker-8594db1f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from crawlspur.halowerk.com](https://www.zero.xyz/host/crawlspur.halowerk.com/llms.txt)