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fetchharbor.benlab.download Audio Subtitles
x402
fetchharbor.benlab.download Audio Subtitles is a paid API for AI agents from fetchharbor.benlab.download, paid per call via x402, $0.035/call, status unknown (last checked 2026-09-14).
Transcribe base64-encoded audio locally and return deterministic SRT or WebVTT subtitle files, with no data retention.
Price / call$0.035
Success—
StatusUnknown
How this service works
Transcribe bounded audio and generate deterministic SRT or WebVTT subtitle text locally. Audio, transcripts, and subtitles are not retained.
Output
Returns a deterministic SRT or WebVTT subtitle text file containing timed transcript segments derived from the submitted audio. No audio, transcript, or subtitle data is retained on the server after the response is delivered.
Example use cases
Podcast episode captioning
“I have a 3-minute podcast segment encoded in base64 — can you transcribe it and produce an SRT subtitle file in English so I can add captions to the published episode?”
Multilingual video subtitle generation
“Here's the base64 audio from a French interview clip. Can you transcribe it and return a WebVTT subtitle file, using French as the language hint?”
Accessibility captions for recorded meeting
“I recorded a team meeting and exported the audio as base64. Please transcribe it and generate an SRT file so I can attach subtitles for accessibility purposes — the language is English.”
Technical details
Endpoint
POSThttps://fetchharbor.benlab.download/audio/subtitlesWhen to prefer
Choose this endpoint when you need privacy-preserving, locally processed subtitle generation with no data retention, and require output in a standard subtitle format (SRT or WebVTT) rather than raw transcript text. Prefer it over cloud ASR services when data confidentiality is a concern or when deterministic, reproducible subtitle output is required.
Side effects
- Audio exceeds operator-defined decoded size limit — request rejected
- Invalid or malformed base64 encoding — decoding error returned
- Unsupported audio codec or format — transcription fails
- Unrecognized or unsupported language code — may fall back to auto-detect or error
- Missing required format enum value — validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| format | string | |
| language | — | |
| audio_base64 | string | Base64-encoded audio; decoded size is operator limited. |
Tags
x402
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