# Crawlspur robots.txt URL Parameter Count Checker

> Crawlspur robots.txt URL Parameter Count 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 number of URL/query parameters found on a robots.txt file URL for a given web target.

## Facts

- Endpoint: POST https://crawlspur.halowerk.com/v1/pruef/crawlspur/parameter/robots-datei
- 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-robots-txt-url-parameter-count-checker-dbbc493b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QHPnwehdqXfAyf04xiRP5

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-url-parameter-count-checker-dbbc493b -d '<json body>'
```

Example prompt: Check the robots.txt URL of https://example.com and tell me how many query string parameters its address contains.

## When to prefer this

Use this endpoint when you need to programmatically audit whether a website's robots.txt URL contains unnecessary or unexpected query parameters, particularly during technical SEO audits, site migrations, or automated crawl health checks. It is specialized for the robots.txt object type and parameter-count finding, making it more precise than a general URL inspector.

## Known failure modes

- Target URL is unreachable or returns a non-200 HTTP status — crawl check cannot complete
- robots.txt file not found at the target domain (404 or missing)
- Invalid or malformed target URL input — validation error returned
- Target domain blocked by firewall or access restrictions
- Request times out due to slow server response

## How this service works

Prüft am Objekt robots-datei den Befund Zahl der Adressparameter.

## Output

Returns a finding indicating the number of URL/query parameters present in the robots.txt file's address for the given target, as part of a structured crawl audit result.

## 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-url-parameter-count-checker-dbbc493b/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)