This document provides an introduction to accessing the Oracle Planning and Budgeting Cloud (PBC) REST API using Groovy scripting. It begins with an overview of REST APIs and describes the Oracle PBC REST API resources and methods. It then introduces Groovy and provides a simple example Groovy program to authenticate and make a request to the Oracle PBC REST API. The document outlines how the Groovy program sets the user credentials, authorization header, and calls the REST API to fetch a response. It also references properties files for server URL, domain, username and password.