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Tempo Halowerk – Script Time-to-First-Paint Checker
x402
Tempo Halowerk – Script Time-to-First-Paint Checker 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 the time-to-visible-render-start (first paint) for a script object at a given public URL.
Price / call$0.001
Success—
StatusUnknown
How this service works
Prüft am Objekt skript den Befund Zeit bis zum sichtbaren Renderstart.
Output
Returns the measured time-to-visible-render-start (first paint) for the specified script resource, expressed as a duration value. This is the performance finding for the 'skript' object type scoped to 'renderstart' timing.
Example use cases
Third-party script render audit
“I want to know how much a third-party analytics script at https://analytics.vendor.com/tracker.js is delaying the visible render start on my site — can you measure the time-to-first-paint for that script?”
CI performance gate for JS bundles
“Before we ship this release, check the render start time for our main bundle at https://app.mysite.com/static/main.bundle.js so we can catch any regressions in visible paint timing.”
A/B comparison of script load strategies
“I'm testing two versions of our script loader — can you measure the time-to-visible-render-start for https://mysite.com/v1/loader.js so I have a baseline to compare against the new version?”
Technical details
Endpoint
POSThttps://tempo.halowerk.com/v1/pruef/tempo/renderstart/skriptWhen to prefer
Choose this endpoint when you specifically need the time-to-visible-render-start metric for a script resource (as opposed to DNS resolution time, TTFB, or total load time). It is ideal for diagnosing render-blocking JavaScript, auditing third-party script impact on perceived performance, or setting CI gates on first-paint timing for JS bundles.
Side effects
- Target URL is not publicly reachable — connection refused or DNS failure
- URL exceeds the 2048-character maximum length
- Script resource returns a non-200 HTTP status, making timing measurement impossible
- CSS selector provided matches no element or is ambiguous
- Rendering environment times out waiting for paint event
- Invalid or malformed URL provided in the 'ziel' field
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| ziel | — |
Tags
x402
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