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Every plan · REST API and MCP

Speaker Separation API

AudioPod's speaker separation API splits a recording into one audio track per speaker: send a file, a URL or a direct upload to POST /api/v1/speaker/extract and poll the job for the tracks. It is the same AudioDiarize engine the dashboard runs, and API access comes with every plan, including free Basic: calls are paid from your prepaid API wallet first, then your credits.

Last updated October 16, 2026

Get an API keySee plans and credits

At a glance

The facts

Per-speaker tracks
POST /api/v1/speaker/extract
Who-spoke-when only
POST /api/v1/speaker/diarize
Simultaneous voices
POST /api/v1/speaker/separate (2–4 voices)
Results
GET /api/v1/speaker/jobs/{id} — tracks as WAV and MP3, plus the timeline
Input
Exactly one of: a multipart file, a URL, or an upload_id from a presigned direct upload
Speaker count
num_speakers when you know it; min_speakers and max_speakers when you only know a range
Clustering
clustering_threshold 0.3–0.95, default 0.7; lower finds more speakers, higher fewer
Crosstalk
overlap_mode = "separate", "duplicate" or "exclusive"
Transcript
include_transcription=true adds a speaker-labeled transcript, no extra charge
Repeats
An identical request while the first is running (under 3 h old) returns that job (duplicate_of: true); force_rerun=true only bypasses one running for over 30 minutes
AI agents
MCP tool separate_speakers
API price (diarize, extract)
$0.20 per minute from the prepaid API wallet, or 1,500 credits per minute when paid from credits

How it works

Step by step

  1. 01

    Create an API key in your AudioPod account.

  2. 02

    POST the recording to POST /api/v1/speaker/extract with any tuning parameters.

  3. 03

    Poll GET /api/v1/speaker/jobs/{id} until it is COMPLETED.

  4. 04

    Download each speaker's WAV or MP3 and, if requested, the transcript.

Choosing the endpoint

  • POST /api/v1/speaker/extract: people take turns (podcasts, interviews, meetings) and you want each person's audio.
  • POST /api/v1/speaker/diarize: you only need the timeline of who spoke when, to cut or label elsewhere.
  • POST /api/v1/speaker/separate: 2–4 voices sound at the same time throughout, such as duets or a choir; mode extract_vocals_first isolates the vocals from music first, voice_only works on speech directly.

Tuning speaker detection

  • Known count: send num_speakers. It is the single biggest accuracy gain.
  • Unknown count: bound it with min_speakers and max_speakers.
  • Similar voices merged into one speaker: lower clustering_threshold toward 0.3.
  • One person split into two in noisy audio: raise it toward 0.95.

FAQ

Questions people ask

Is there an API for speaker diarization and separation?

Yes. POST /api/v1/speaker/extract writes one audio track per speaker, POST /api/v1/speaker/diarize returns the who-spoke-when timeline only, and POST /api/v1/speaker/separate splits 2–4 simultaneous voices. The Python SDK wraps diarize and extract and the Node SDK wraps diarize plus job lookup; neither wraps POST /api/v1/speaker/separate, so call it over REST.

How do I tell the API how many speakers there are?

Send num_speakers when you know it, or min_speakers and max_speakers for a range. clustering_threshold (0.3–0.95, default 0.7) fine-tunes detection: lower values find more speakers, higher values fewer.

What happens if I submit the same file twice?

While the first job is still running and was started less than 3 hours ago, an identical request returns that job with duplicate_of: true and is not charged again. Failed jobs never count as repeats. force_rerun=true submits a new, charged job only when the running one has gone over 30 minutes; a fresher running job is still returned.

Can an AI agent separate speakers?

Yes. The AudioPod MCP server exposes a separate_speakers tool, so an AI assistant or coding agent can start a separation and fetch the tracks.

How is API usage billed?

Per minute of audio at API prices, not the dashboard's 330 credits per minute: diarization and extraction cost $0.20 per minute from the prepaid API wallet, or 1,500 credits per minute when paid from credits (credits convert at the pay-as-you-go rate). The charge is reserved when the job starts and refunded if it fails. See pricing for plans.

Related

Where to go next

  • Speaker SeparationThe tool, the free demo and the speaker guides.
  • DevelopersAPI keys, SDKs and the MCP server.
  • Overlapping voicesWhat each overlap_mode does to crosstalk.
  • Speaker-labeled transcriptThe transcript include_transcription adds.

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