need help to rewrite url

Hi i am creating an API using JSON. I using a website with url "http://www.domain.com/api/". I have writtin all API with respect to their functions in a single handler file and accessing this handler file from an index file (for testing purpose from local server) such that the url is "http://www.domain.com/api/index.php" and i want this url to be "http://www.domain.com/api/".

My variable used for JSON is:

data = '{"appId":"'+appId+'", 
          "m":"login",
          "email":"abc@yahoo.com",
          "pwd":"abcd", 
          "deviceToken": "111111111"}';
 

I am sending this using ajax from index file to fetch function defined in handler file.

I heard that we can do this using rewriting url. Can anyone tell me How to rewrite url for this and how to fetch these variables. "http://www.domain.com/api/". this function name is 'm' variable which is used to fetch respected function from handler file.

Can anyone help? I am new with JSON (though most of the work is complete, but i am unable to meet the url requirement)

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