Rammer’s Punctuation API can be used to insert punctuation in the raw text or the transcription from any speech recognition system. This API can recognize commas, periods, question marks, exclamation marks, and colons for the given raw text and transform the text to a readable punctuated sentence.
The system behind the APIs is an Artificially Intelligent system, hence the accuracy is not guaranteed to be as human level. However, the API works in most of the cases and the system is improved periodically, hence the output of this API will increase periodically going forward as well.
Note that this functionality is currently available only in the English language and works best with US English.