SharePoint 2013 REST API calls using Fiddler

SharePoint 2013 REST API is the best choice to access server objects from client site. The easiest and more convenient way to test this is using Fiddler tool

The below are the two samples to demonstrate how to use Fiddler and pass header and body content to send request

Example 1: Add a list item (task) to a List (Tasks list)

Header 

ACCEPT: application/json;odata=verbose
Content-Type: application/json;odata=verbose
X-RequestDigest: 0xE2872916105EF8654E29E7295F06D7A0CA96847415B5AC010F00FE871BADC181D85783853ECA1C9002C402B675F2CC00C9312293668F261888E7B3694F138567,01 Oct 2014 18:39:40 -0000
Host: yourhost.com
Content-Length: 91

Body

{'__metadata': {'type':'SP.Data.TasksListItem'},
'Title': 'Let me in via Fiddler REST'
};

Example 2: Add a list to a Web

Header

ACCEPT: application/json;odata=verbose
Content-Type: application/json;odata=verbose
X-RequestDigest: 0x16F60B1D8E5FD4DEC53E3609823866DA3DD8BC187A2C4F8070B4761183FC2C60B974ECA083B2E5613A1019C79277B18B4EDDEB41E3452F2D43CCD01ACDAF3957,01 Oct 2014 19:41:49 -0000
Host: rmitscvpspqa02:2000
Content-Length: 191

Body

{ '__metadata': { 'type': 'SP.List' }, 'AllowContentTypes': true, 'BaseTemplate': 100,
    'ContentTypesEnabled': true, 'Description': 'My list description', 'Title': 'Test List from fiddler' }

To test it, go to SharePoint site and verify. Its cool :) 

Note : Where do I get the form digest value to include in my request?

As described on this page on MSDN, you can retrieve this value by making a POST request with an empty body to http://site/_api/contextinfo and extracting the value of the “d:FormDigestValue” node in the XML that the contextinfo endpoint returns.