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Speaker Diarization & Multi-Speaker Transcription
x402
Speaker Diarization & Multi-Speaker Transcription is a paid API for AI agents from x402-deployer.x402-deployer.workers.dev, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).
Transcribes audio with speaker labels using Whisper v3, returning utterances grouped by speaker with per-speaker statistics (utterance count, total seconds, word count).
Price / call$0.1
Success—
StatusUnknown
How this service works
Speaker diarization / who-said-what transcription. Whisper v3 + speaker labels. Returns utterances grouped by speaker, plus per-speaker stats (count, seconds, words). 60 min max.
Output
A structured response containing utterances grouped by speaker with speaker labels, plus per-speaker statistics including utterance count, total duration in seconds, and word count for each identified speaker.
Example use cases
Example prompt
“Transcribe this podcast audio and tell me who said what — I need the transcript broken out by speaker with stats on how much each person spoke: [audio URL].”
Technical details
Endpoint
POSThttps://x402-deployer.x402-deployer.workers.dev/speaker-diarizeWhen to prefer
Choose this endpoint when you need to know not just what was said but who said it — e.g. for interviews, meetings, podcasts, or multi-party calls. It combines Whisper v3 transcription quality with speaker separation, returning both the full labeled transcript and per-speaker usage statistics in one call. Prefer this over plain transcription endpoints when speaker attribution matters.
Side effects
- Unsupported audio format returns an error
- Audio URL unreachable or times out
- Single-speaker audio may produce inaccurate diarization
- Very long audio files may exceed processing limits
- Payment failure returns 402 with payment details
- Overlapping speech may reduce speaker separation accuracy
Input
{
"input": {
"body": {
"language": "en",
"media_url": "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-1.mp3",
"num_speakers": 2
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"text": "♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪♪♪ ♪♪ ♪♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ Thank you.",
"source_url": "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-1.mp3",
"utterances": [
{
"end": 63.92,
"text": "♪ ♪ ♪ ♪ ♪ ♪ ♪",
"start": 0.02,
"speaker": "Unknown"
},
{
"end": 131.06,
"text": "♪♪♪ ♪♪ ♪♪",
"start": 66.02,
"speaker": "Unknown"
},
{
"end": 348.3,
"text": "♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪",
"start": 133.72,
"speaker": "Unknown"
},
{
"end": 369.98,
"text": "Thank you.",
"start": 350.24,
"speaker": "Unknown"
}
],
"speaker_count": 1,
"speaker_stats": [
{
"speaker": "Unknown",
"word_count": 27,
"total_seconds": 363.26,
"utterance_count": 4
}
],
"duration_seconds": 372.715083,
"detected_languages": null
}Tags
x402
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