Hi i'm creating exchange like service, i need some for showing all transaction to user like Deposit and Withdrawal but i m not using core wallets of any coin, using paper wallets for wallet creation and i want to show balance of user and transaction so is there any API available for so that i can fetch such details of user. Please give such API for Altcoins also or provide me name of any wallet through which my task can be completed.

I'm creating an exchange like service, I need some for showing all transaction to user like deposit and withdrawal but I'm not using core wallets of any coin, using paper wallets for wallet creation and I want to show balance of user and transaction. So, is there any API available for so that I can fetch such details of user? Please give such API for Altcoins also or provide me name of any wallet through which my task can be completed.