# tempo.halowerk.com – Script Render-Blocking Resources Check

> tempo.halowerk.com – Script Render-Blocking Resources 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 render-blocking script resources on a given web page or specific script element.

## Facts

- Endpoint: POST https://tempo.halowerk.com/v1/pruef/tempo/blockierer/skript
- 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-script-render-blocking-resources-check-d1696a81
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cGaVWkSKEpPtXxg7z980b

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-script-render-blocking-resources-check-d1696a81 -d '<json body>'
```

Example prompt: Can you check how many render-blocking scripts are on https://example.com and tell me the count so I know what's slowing down page rendering?

## When to prefer this

Choose this endpoint when you need a precise, automated count of render-blocking script resources on a specific URL or page element, particularly for web performance auditing, CI/CD pipeline checks, or monitoring page speed regressions. It is purpose-built for the render-blocking-scripts metric specifically (as opposed to broader Lighthouse-style full audits), making it ideal for targeted, lightweight script-blocking checks at $0.001 per call.

## Known failure modes

- Invalid or unreachable URL returns an error
- Non-public or localhost URLs are rejected
- CSS selector matches no element or multiple elements (first match used)
- Target page blocks crawling or returns non-200 status
- Malformed input schema causes validation error
- Request timeout if target page is very slow to respond

## How this service works

Prüft am Objekt skript den Befund Zahl renderblockierender Ressourcen.

## Output

Returns a numeric finding (Befund) representing the count of render-blocking script resources detected on the target page or specified script element, along with audit metadata such as the target URL and selector used.

## 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-script-render-blocking-resources-check-d1696a81/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)