Create Transcription

Upload an audio file and receive a structured JSON response with transcription, speaker diarization, and AI analysis in a single synchronous API call.

POST/v1/transcribe

Request

Send a multipart/form-data request with the audio file and optional parameters:

Field	Type	Required	Description
`file`	File	Yes	Audio file. Supported: MP3, WAV, M4A, OGG, FLAC, AAC, WebM, Opus, MP4. Max 100 MB
`language`	String	No	ISO 639-1 code (e.g., "en"). Auto-detected if omitted
`mode`	String	No	`polished` (default) or `verbatim`. Verbatim preserves raw transcript without AI formatting
`redact_pii`	Boolean	No	Mask PII in transcript (names, SSNs, card numbers). Pro plan only.
`instructions`	String	No	Custom AI prompt. Max 2,000 chars. See Custom Instructions
`plan`	String	No	`pro` (default) or `lite`. Pro ($0.39/hr) includes full 11-feature AI analysis. Lite ($0.15/hr) includes diarization and transcript cleanup only.

Example

curl

curl -X POST https://api.voxparse.com/v1/transcribe \
  -H "X-API-Key: YOUR_API_KEY" \
  -F "[email protected]" \
  -F "plan=pro" \
  -F "language=en"

Response

Returns a JSON object with the transcript, segments with timestamps, word-level timing, and an ai_analysis object. Pro plan includes sentiment, compliance, financial data, call summary, and action items. Lite plan includes diarization labels and cleaned transcript only.

Tip: Use mode=verbatim for raw transcripts without AI formatting. Use the default polished mode for full AI analysis with diarization, sentiment, and compliance.

Plan selection: Use plan=pro ($0.39/hr) for full AI analysis including sentiment, compliance, financial extraction, and custom instructions. Use plan=lite ($0.15/hr) for diarization and transcript cleanup only. If omitted, defaults to pro.

For the complete response schema, see the Full API Reference.