I am developing an application for the iPhone where I want to authenticate (login form) to the site and get some information by doing some screen cleaning. Is there an API available for this or documentation, how could I do this?
thanks
ASIHTTPRequest is a fantastic alternative to NSURLRequest, and there are some great code examples on the linked page for you to start on the right track.
You can try the Gogybot library for Monotouch. This allows you to use very simple commands, such as GoToUrl to open a page, SetValue to enter text into text fields, and ClickSubmit for authentication.
See docs for NSURLRequest
NSURLRequest