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HALOWERK audiowerk Speech Duration Estimator
x402
HALOWERK audiowerk Speech Duration Estimator is a paid API for AI agents from audio.halowerk.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).
Estimates the duration of spoken audio for a given text, delivery style, language, and pause settings without generating the audio itself.
Price / call$0.002
Success—
StatusUnknown
How this service works
HALOWERK audiowerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.
Output
Returns a computed duration estimate (likely in seconds or milliseconds) representing how long the provided text would take to be spoken, accounting for the chosen delivery rate (syllables per second), language-specific syllable rules, and the configured pause durations at commas, sentences, and paragraph breaks.
Example use cases
Video script timing check
“Before I generate the voiceover, can you tell me how long this English marketing script will be at a narration delivery pace with default pause settings? The script is: 'Introducing our new platform. Built for teams who move fast. Try it free today.'”
Podcast segment planning
“I'm planning a podcast and need to know if this intro script fits in 30 seconds — can you estimate how long it will take to speak at a brisk delivery in English, with 150ms comma pauses and 500ms sentence pauses?”
Multilingual audio duration comparison
“I have the same product description in German and French and I need to know which version will be shorter when spoken at a slow narration pace — can you estimate the duration for each with default pause settings?”
Technical details
Endpoint
POSThttps://audio.halowerk.com/speech-durationWhen to prefer
Use this endpoint when you need to estimate audio duration before committing to full TTS generation, to validate script length fits a time slot, or to plan audio production budgets. It is far cheaper and faster than generating audio and discarding it. Prefer this over silence-removal or normalization endpoints when the goal is pre-production timing rather than post-production audio editing.
Side effects
- Text exceeds 40,000 character limit — request rejected with validation error
- Invalid or unsupported language code provided — defaults may not apply correctly
- syllables_per_second provided without delivery=custom — parameter may be ignored
- Payment of 0.002 USDC not completed via x402 — 402 Payment Required response
- Text too short (empty string) — minimum length validation failure
- Invalid delivery enum value — schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | The text to be spoken. |
| delivery | string | Delivery style. Each carries its own syllables per second. |
| language | string | Language of the text. Decides which syllable rules apply. |
| comma_pause_ms | integer | Pause added at a comma, semicolon, colon or dash. |
| sentence_pause_ms | integer | Pause added at a full stop, question mark or exclamation mark. |
| paragraph_pause_ms | integer | Pause added at a blank line. |
| syllables_per_second | number | Own rate, only with delivery=custom. |
Tags
x402
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