How to create a transfer API for ADA token?

I am trying to make an exchange api for tokens and i am not able to find any methods for ADA token. I’ve tried the one given on the official page but it doesn’t return anything, so is there any other methods for ADA tokens that can be used in an exchange?

@cpp-ridham, are you looking for an HTTP API in the wallet (as in, or is this a question about using the WalletAPI class in a Plutus contract?