Captcha in Rasa

How can we add captcha in Rasa ? I am making an action to track application status but i want to avoid spamming so to verify and stall i need captcha . Any solutions ?

This isn’t something you would do with Rasa. You’re front end user interface and authentication process would handle this. Until your front end performs the verification you want, you would not allow access to a chat interface to Rasa.