Creating subjects via the XNAT REST API is simple. Performing a PUT to the following URI would create a subject. (This would create a subject called '1' within a project with the ID 'TEST')
The TEST project must exist before this command will succeed.
You can also assign demographics to this subject using the XML PATH shortcuts defined here : XNAT REST XML Path Shortcuts
To assign the gender and handedness to this subject, you would execute the following PUT.