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

SuperTokens.com

I am trying to create a websocket server & I need to authenticate the clients. I can authenticate them in rest apis , how can i do it using Socket.io  with supertokens..

Hey! You can make a JWT using the Session.cretateJWT function and use that as a way of auth for web socket.

I currently use session Verification for other modules. Do i need to modify others if i use jwt?

no. You can use JWT just for websocket connection and that can be independent of rest API session verification