Check out Vodafone Idea Developer Portal
Vodafone Idea Developer portal Resources section will provide you the Service information, the End-User agreement information and a list of Guides that provides the functionalities of the APIs and help you in understanding the Portal better.
The Sandbox guide will help you to test your application and the Payment guide will help you with the API that does LIVE transcations.
Browse our Resources section to view all the general and technical documents that you need.
The Vodafone Idea Developer Portal guide makes you understand the Vodafone Idea Developer Portal GUI. The sample screens and the terms are well defined to ensure the user can explore the portal without any hassle.