# tempo.halowerk.com – Font Resource Count Check

> tempo.halowerk.com – Font Resource Count Check is a paid API for AI agents from tempo.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Checks the number of loaded font resources (Schrift objects) on a given web page or URL target.

## Facts

- Endpoint: POST https://tempo.halowerk.com/v1/pruef/tempo/anfragen/schrift
- 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/tempo-halowerk-com-font-resource-count-check-45603cc7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ln-CLDxsjRS4zXo7gpkhN

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 tempo-halowerk-com-font-resource-count-check-45603cc7 -d '<json body>'
```

Example prompt: Can you check how many font resources are loaded on https://example.com and tell me the total count — use a CSS selector of 'body' if you want to scope it to the main content area.

## When to prefer this

Use this endpoint when you specifically need to count the number of font (Schrift/web font) resources loaded by a web page, optionally scoped to a CSS element. It is part of the tempo.halowerk.com performance auditing suite and is distinct from sibling endpoints that measure render-blocking resources, total load time, or DNS resolution. Prefer this over generic performance tools when you need a precise, programmatic font resource count as a structured metric.

## Known failure modes

- Invalid or unreachable URL returns an error or empty result
- CSS selector matches zero elements — falls back to first match or errors
- Non-public/internal IP addresses rejected
- URL exceeds 2048 character limit — validation error
- Target page blocks crawlers, resulting in incomplete resource count

## How this service works

Prüft am Objekt schrift den Befund Zahl geladener Ressourcen.

## Output

Returns a numeric finding (Befund) representing the total count of font (Schrift) resources loaded when the target URL is fetched, scoped optionally to a CSS selector or comparison 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/tempo-halowerk-com-font-resource-count-check-45603cc7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tempo.halowerk.com](https://www.zero.xyz/host/tempo.halowerk.com/llms.txt)