# Halowerk Tempo – Document Connection Time Check

> Halowerk Tempo – Document Connection 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 2026-09-14).

Measures and reports the TCP/TLS connection establishment time for a given document URL

## Facts

- Endpoint: POST https://tempo.halowerk.com/v1/pruef/tempo/verbindungszeit/dokument
- 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-document-connection-time-check-eae243fe
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_U92V2aN53CnFsUYcE0i3N

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-document-connection-time-check-eae243fe -d '<json body>'
```

Example prompt: Can you check the TCP connection establishment time for https://example.com/index.html and tell me if it's within acceptable limits?

## When to prefer this

Use this endpoint when you specifically need to measure the TCP/TLS connection establishment time (not total load time or TTFB) for a document resource. Choose this over generic uptime monitors when you want granular network-layer latency data for a specific URL. It is part of the Halowerk Tempo suite, so prefer it when already using sibling endpoints for other performance metrics on the same domain.

## Known failure modes

- URL is unreachable or returns a non-200 response — returns an error or failed-check result
- Invalid or malformed URL provided — schema validation error
- Target server blocks automated requests — connection timeout or refusal
- URL resolves to a private/internal IP — rejected as non-public address
- CSS selector matches no element on the page — first matching element used or error returned

## How this service works

Prüft am Objekt dokument den Befund Verbindungsaufbauzeit.

## Output

Returns the measured connection establishment time (TCP/TLS handshake duration) for the specified document URL, expressed as a numeric latency value with associated performance findings.

## 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-document-connection-time-check-eae243fe/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)