A command line tool such as cURL or Wget is required to manipulate Datameer using the REST API.
For a Windows machine, you can use Cygwin and the cURL package (you should look into Installing cURL on Cygwin on Windows), but this method still requires command line manipulation.
While developing a REST service you want to submit commands and data manually and see the response. Use this article to learn about GUIs for REST services and manual testing.
You can check available GUI front ends, clients, and browser plug-ins mentioned in