Before you create Rest API you must have enable core Web services module list & Install custom "Rest Ui" module and enable it. Here are the steps to create a content type item   Step:1  Go to Admin/Configuration/Web-services/Rest  and enable " Content type "

Before you create Rest API you must have enable core Web services module list & Install custom "Rest Ui" module and enable it. Here are the steps to create a webform Step:1  Go to Admin/Configuration/Web-services/Rest  and enable "Webform "  

Before you create Rest API you must have enable core Web services module list & Install custom "Rest Ui" module and enable it. Here are the steps to create a block item   Step:1  Go to Admin/Configuration/Web-services/Rest  and enable "Custom block"

Before you create Rest API you must have enable core Web services module list & Install custom "Rest Ui" module and enable it. Here are the steps to create a menu item list   Step:1  Install "rest_menu_items" module and enable it. Step:2  Go to Admin = Configuration = Web-services = R