How to get the available balance of a specific address using blockchain.info?
Your question:


  How to get the available balance of a specific address using blockchain.info


The description for the /balance API:


  List the balance summary of each address listed.


So use /balance.

/unspent lists all the outputs for all addresses you provide in one big list, not grouped by address. But since you're just adding them all anyway, it doesn't make much difference for you. The /balance result is shorter and simpler.


  basically want to know the total amount available to spend on each address(actually on the whole wallet but there is no such api call


Have you checked the Wallet API? "Fetching the wallet balance" looks like what you need.