# tempo.halowerk.com – Image Connection Setup Time Check

> tempo.halowerk.com – Image Connection Setup Time Check is a paid API for AI agents from tempo.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-16).

Measures and checks the TCP/TLS connection setup time (Verbindungsaufbauzeit) for an image resource at a given public URL.

## Facts

- Endpoint: POST https://tempo.halowerk.com/v1/pruef/tempo/verbindungszeit/bild
- 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/tempo-halowerk-com-image-connection-setup-time-check-700731f2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EAOxYLNz0mOZo4FlaLb-7

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-image-connection-setup-time-check-700731f2 -d '<json body>'
```

Example prompt: Can you check the connection setup time for the hero image at https://example.com/images/hero.jpg and tell me how long it takes to establish a connection?

## When to prefer this

Use this endpoint specifically when you need to isolate and measure the TCP/TLS connection setup time for an image resource (not a full page, script, font, or video). It is ideal for diagnosing slow connection establishment to image hosts or CDNs, and for automated performance auditing of individual image assets. Choose sibling endpoints for other resource types (fonts, scripts, videos) or other timing metrics (TTFB, render start).

## Known failure modes

- Non-public or unreachable image URL returns an error or timeout
- URL does not point to an image resource, leading to invalid test results
- CSS selector matches zero or multiple elements if used with an object input
- Provided address exceeds the 2048-character limit
- User agent string contains invalid characters or exceeds length limit
- Network-level failures or firewalls block the probe connection

## How this service works

Prüft am Objekt bild den Befund Verbindungsaufbauzeit.

## Output

Returns a performance finding (Befund) indicating the measured TCP/TLS connection setup time for the specified image resource, including the raw timing value and an assessment of whether it is within acceptable bounds.

## 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-image-connection-setup-time-check-700731f2/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)