Is there a way for us to send the start time / end time for transcription instead of transcribing the whole length of a call recording?

Yes, you can!

There are parameters that you can add to your POST request that allow you to set the start time and end time of where you would like to start/stop transcribing your audio file.

More specifically you can use the audio_start_from parameter and enter the time in milliseconds of where you would like to start transcribing your media file and the audio_end_at parameter and enter the time in milliseconds of where you’d like to stop transcribing your media file.

The parameters are referenced in the Set the start and end of the transcript section of our documentation.