# Crawlspur Image Content-Type Checker

> Crawlspur Image Content-Type 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 and returns the delivered HTTP content-type of an image object at a given URL.

## Facts

- Endpoint: POST https://crawlspur.halowerk.com/v1/pruef/crawlspur/inhaltstyp/bild
- 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-image-content-type-checker-bf5d5672
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-5qBnWjHj_SO-MX9bNcVJ

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-image-content-type-checker-bf5d5672 -d '<json body>'
```

Example prompt: Can you check what content-type is actually being delivered by this image URL https://example.com/images/hero.jpg — I want to make sure it's returning image/jpeg and not something wrong like text/html?

## When to prefer this

Use this endpoint when you need to programmatically verify the HTTP content-type header delivered by an image URL — especially useful during SEO audits, CDN validation, CMS migrations, or automated site health checks where image MIME types must match expectations.

## Known failure modes

- URL is unreachable or returns a network error
- Target is not a public HTTP/HTTPS address
- URL returns a non-image resource and result reflects that discrepancy
- CSS selector matches no element or multiple elements (first match used)
- Rate limiting or payment failure via x402 protocol

## How this service works

Prüft am Objekt bild den Befund ausgelieferten Inhaltstyp.

## Output

Returns a finding (Befund) describing the delivered HTTP content-type of the specified image object, indicating what MIME type the server actually responded with for that image URL.

## 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-image-content-type-checker-bf5d5672/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)