StatusNet, Identi.ca, and transitioning to pump.io

I am integrate pump.io social server on my iOS development. The pump.io server has created/installed at our server end. I am stuck with user registration/login process. As we know, user registration with passing different parametrs and get response as well. Actually, i need to check the api URL's. So that i familiar with the api’s.

I get the feeds, followers and following with this url:: https://<hostname>/api/user/<nick name>/feed

Trying to register: https://<hostname>/api/register/nickname=sam&password=sam
But bad luck. I don't know what i am missing. Please suggest me. Waiting your response. You can also email me at shiju.varghese@dekhdekh.com

Regards
Shiju Varghese