Check wallet address balance programmatically in PHP using Blockchain wallet api I'm tyring to fetch my wallet balance programmatically using the Blockchain wallet api. Currently I was expecting that a simple api call to https:/blockchain.info/merchant/$my_guid/balance?password=$my_blockchain_password would have returned the value but it currently returns this page.

Is there something I'm not doing correctly?
The Blockchain Wallet API provides a simple interface Merchants can use to programmatically interact with their wallet.
  Installation
  
  To use this API, you will need to run small local service which be responsible for managing your Blockchain Wallet. Your application interacts with this service locally via HTTP API calls. Click here for complete setup instructions on GitHub.


So you need to install the service, then replace the blockchain.info in that link with the IP to your server, or if it's on the same machine localhost:3000