Obtaining information about the parameters to be applied through query strings and obtaining the API key, if required, is the preliminary step in gaining API access. Most of the public or free APIs are quite straightforward and easy to manage in comparison to developer APIs that are provided by Google, Twitter, and Facebook.

API requests can be made by using a web browser. However, in this section, we will try to display some general cases that can be encountered while accessing APIs, while also exhibiting some important properties of the RESTful API.