SuperTokens is an open source authentication solution offering features like: Different types of login: Email / password, Passwordless (OTP or Magic link based).

SuperTokens.com

When hitting 'auth/signinup/code/consume' I want to send additional info like name and consume the same in backend. I'm using api override but any additional parameters I pass are filtered out

I'm sending 

{
"deviceId": "0+DSjPKuOg9onHT5t4J9pyK9EyGkCAel+nb6yxnF/Jk=",
    "preAuthSessionId": "0ng7fjcwYqVFvWyknBMT0WDsVVh-pv22x4Jxp12fUmk=",
    "userInputCode": "775001",
    "firstName": "Saurabh"
}

firstName is not part of input variable in override : {apis ...}

You can access the original request object to read the custom fields in your input body

You can get access to the request object like input.options.req.original