# Halowerk Tempo – Connection Time Check for Font Resources

> Halowerk Tempo – Connection Time Check for Font Resources 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).

Measures and reports the connection establishment time (Verbindungsaufbauzeit) for font/text resources (Schrift objects) at a given URL.

## Facts

- Endpoint: POST https://tempo.halowerk.com/v1/pruef/tempo/verbindungszeit/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/halowerk-tempo-connection-time-check-for-font-resources-dfc05806
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Q24fZGJAFhNkmZWAbjoQE

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 halowerk-tempo-connection-time-check-for-font-resources-dfc05806 -d '<json body>'
```

Example prompt: Can you check the connection establishment time for the web font file at https://fonts.mysite.com/myfont.woff2 and tell me if it's within acceptable limits?

## When to prefer this

Use this endpoint when you specifically need to isolate and measure the TCP/TLS connection establishment time for font or text (Schrift) resources, as opposed to total page load time, DNS resolution time, or other performance metrics. Prefer this when diagnosing slow font loading where the connection phase (not DNS or transfer) is suspected as the bottleneck.

## Known failure modes

- Target URL is unreachable or returns a non-2xx status — returns an error or null result
- URL is not a valid public HTTP(S) address — validation error
- CSS selector matches no element or multiple elements (first match used) — may return unexpected result
- Network timeout during connection probing — may return a timeout error
- Invalid user_agent string pattern — schema validation failure

## How this service works

Prüft am Objekt schrift den Befund Verbindungsaufbauzeit.

## Output

Returns a performance finding (Befund) for the connection establishment time of the targeted font/text resource, including the measured duration and assessment of the connection phase for the specified Schrift object.

## 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/halowerk-tempo-connection-time-check-for-font-resources-dfc05806/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)