# Crawlspur robots.txt Permission Check for Parameter URL

> Crawlspur robots.txt Permission Check for Parameter URL is a paid API for AI agents from crawlspur.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-16).

Checks whether a given URL (with parameters) is allowed to be crawled according to the site's robots.txt file

## Facts

- Endpoint: POST https://crawlspur.halowerk.com/v1/pruef/crawlspur/robots-erlaubt/parameter-url
- 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/crawlspur-robots-txt-permission-check-for-parameter-url-41741ec6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jflnFQhnoLrDsWsgce-Vd

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-robots-txt-permission-check-for-parameter-url-41741ec6 -d '<json body>'
```

Example prompt: Check whether the URL https://example.com/products?category=shoes&sort=price is allowed to be crawled according to robots.txt — I want to know if bots are permitted to access this parameterized page.

## When to prefer this

Use this endpoint when you need to verify whether a specific parameterized URL is permitted by a site's robots.txt — especially useful for technical SEO auditing, pre-crawl validation, or diagnosing why a URL with query parameters might be excluded from search engine indexing. Choose this over generic HTTP checkers when you specifically need robots.txt compliance analysis for a URL including its query string parameters.

## Known failure modes

- URL is not publicly accessible — endpoint cannot retrieve robots.txt
- Malformed or non-HTTP(S) URL provided — validation error
- robots.txt file is missing or returns non-200 status — indeterminate result
- URL exceeds 2048 character maximum length
- User agent pattern does not match allowed format — input validation error

## How this service works

Prüft am Objekt parameter-url den Befund Freigabe durch robots.txt.

## Output

Returns a finding indicating whether the specified URL (with query parameters) is permitted or disallowed by the site's robots.txt rules, including the crawl allowance status for that specific address

## 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-robots-txt-permission-check-for-parameter-url-41741ec6/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)