I have recently finished installing the Bitcoin client. One site i was using to help guide me is called http://www.weusecoins.com/en/. On the mining guide section of that site it says, If you're mining on your own you need to start by setting up your Bitcoin client and set it up for JSON-RPC. I was trying to figure out what it is and how to set it up if i need it but i could not figure it out. My questions then are what is JSON-RPC and do i need it ? Is it set up by default in the original Bitcoin client ?
The JSON-RPC interface is a way for other programs to interact with Bitcoin-Qt or
bitcoind while it's running. It's useful for doing things like mining or building a web site that needs to talk to the Bitcoin network directly. Most users don't need to worry about it or set it up.