Is it possible to use Siri as voice to text converter and then use third party webhooks to process text?

I am thinking of using Siri as voice to text converter only for my project. Siri will convert voice from user to text then send it to a webhook (A RASA chat bot server) and receive output text from it and converts it to voice for end user.

Is it possible to use Siri as voice to text converter and then use third party webhooks to process text?
 
 
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