The illustration below outlines the process followed each time an App is loaded.

1. When an App is loaded, a call is made to the 3^rd party developer’s server. For example, when the Share Your Mood App is loaded, the Rediff Apps server makes a call to www.x.com/share-your-mood, which is the callback URL for this App.
2. Calls to 3^rd party developer’s server from the Rediff Apps server:
   1. Whenever an App is loaded, the Rediff Apps server sends an Initialization XML(as shown below) in the POST field to the App's callback URL. The Initialization XML will have the following structure.

      <?xml version="1.0"?>
            <initialcall>
                    <userid>XXXXXXXXXX</userid>
            </initialcall>

Also X-REDF-UID, X-REDF-AUTHKEY, X-REDF-UAUTH variables is set in Header.

1. All calls from the App should go to the 3^rd party developer’s server i.e. Callback URL, or to other Rediff Services, such as MyPage or Pages.
   
2. The 3^rd party developer’s server will build the App using the data and patterns from the Rediff API server.
   All calls to the Rediff API server should include the user’s ID, the Apps AuthKey and the AppKey.
3. The App built in (Step 3) will be returned to the Rediff Apps server.
4. The Rediff Apps server renders your App in the user’s window.

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