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POST
/
stt
curl -X POST https://api-dev.qcall.ai/tts/stt \
  -H "Authorization: Bearer your-api-key" \
  -F "audio=@recording.mp3" \
  -F "language=en" \
  -F "timestamps=true"

{
  "text": "Hello, this is a test of the speech to text API. It works great!",
  "language": "en",
  "confidence": 0.95,
  "duration": 5.2,
  "words": [
    {
      "word": "Hello",
      "start": 0.0,
      "end": 0.5,
      "confidence": 0.98
    },
    {
      "word": "this",
      "start": 0.6,
      "end": 0.8,
      "confidence": 0.97
    }
  ]
}

​
Request

​
Headers

​
Authorization
string
required
Bearer token with your API key
​
Content-Type
string
required
multipart/form-data

​
Form Data

​
audio
file
required
Audio file to transcribe
  • Supported formats: MP3, WAV, FLAC, OGG, M4A
  • Max file size: 25MB
  • Max duration: 10 minutes
​
language
string
Language code for transcription (e.g., “en”, “es”, “fr”). If not specified, language will be auto-detected.
​
model
string
default:"general"
Transcription model: “general”, “phone_call”, “meeting”, “medical”
​
timestamps
boolean
default:"false"
Include word-level timestamps in the response
​
speaker_labels
boolean
default:"false"
Enable speaker diarization (identify different speakers)

​
Response

​
text
string
Transcribed text
​
language
string
Detected or specified language code
​
confidence
number
Confidence score (0-1)
​
duration
number
Audio duration in seconds
​
words
array
Word-level details (if timestamps enabled)
​
words[].word
string
Individual word
​
words[].start
number
Start time in seconds
​
words[].end
number
End time in seconds
​
words[].confidence
number
Word confidence score
curl -X POST https://api-dev.qcall.ai/tts/stt \
  -H "Authorization: Bearer your-api-key" \
  -F "audio=@recording.mp3" \
  -F "language=en" \
  -F "timestamps=true"

{
  "text": "Hello, this is a test of the speech to text API. It works great!",
  "language": "en",
  "confidence": 0.95,
  "duration": 5.2,
  "words": [
    {
      "word": "Hello",
      "start": 0.0,
      "end": 0.5,
      "confidence": 0.98
    },
    {
      "word": "this",
      "start": 0.6,
      "end": 0.8,
      "confidence": 0.97
    }
  ]
}