# tempo.halowerk.com – iframe Byte Transfer Size Check

> tempo.halowerk.com – iframe Byte Transfer Size 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).

Checks the transferred byte size (payload weight) of an iframe embedded in a web page by probing the given URL.

## Facts

- Endpoint: POST https://tempo.halowerk.com/v1/pruef/tempo/gewicht/iframe
- 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-iframe-byte-transfer-size-check-6d53635c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hf5JFl1jPUaArrzF57WrO

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-iframe-byte-transfer-size-check-6d53635c -d '<json body>'
```

Example prompt: Can you check how many bytes are transferred by the iframe on https://example.com — use the CSS selector '#ad-iframe' to target it specifically?

## When to prefer this

Use this endpoint when you specifically need to measure the byte transfer size of an iframe element on a web page, such as when auditing third-party embeds, ad widgets, or partner iframes for network performance impact. Prefer this over generic page-weight tools when you want granular iframe-level measurement rather than whole-page metrics.

## Known failure modes

- Target URL is not publicly accessible (returns 4xx/5xx or requires authentication)
- CSS selector matches zero elements on the page, returning an error or empty result
- URL is malformed or exceeds 2048 characters
- Target iframe does not transfer measurable data (e.g., blocked by CORS or browser policy)
- Network timeout when probing the target URL

## How this service works

Prüft am Objekt iframe den Befund übertragene Bytemenge.

## Output

Returns a performance finding indicating the total number of bytes transferred by the specified iframe element when the target URL is loaded, allowing assessment of network payload weight for that embedded resource.

## 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-iframe-byte-transfer-size-check-6d53635c/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)