---
title: "Unified Stt"
method: POST
path: "/v1/speech/transcribe"
tags: ["Unified Agent APIs"]
---

# Unified Stt

`POST /v1/speech/transcribe`

Unified speech-to-text (batch mode).

Transcribes pre-recorded audio to text. Provide either a URL to the audio file
or base64-encoded audio data. Returns transcript with confidence scores and
word-level timing.

For real-time streaming transcription, use the WebSocket endpoint at
/speech/ws/{session_id} (create session via POST /speech/start_session).

## Request body

- AppApiUnifiedSpeechTranscribeRequest
  - `audio_url` string, nullable
  - `audio_base64` string, nullable
  - `language` string

## Response `200`

Successful Response

- unknown

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.net/suprsonic/apis/suprsonic-unified-agent-api.md) · [All operations](https://skmtc.net/suprsonic/apis/suprsonic-unified-agent-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/suprsonic/suprsonic-unified-agent-api/versions/2a1b6fcb4ef0/schema)