Hover over the "click here" in Play > Playback and view the link shown in your browsers tooltip. Most of the calls have parameters, but some of the click here examples don't show them.
The arguments are on the documentation page, it's the "parameters" under each API name.http://localhost:52199/MCWS/v1/Files/Current?action=JSON&Formatted=1"Action" and "Formatted" are parameters, as described in the documentation page for /Files/Current.
When I hover over Click here I see a tool tip that says "Click here" and when I click I see response examples
It is Basic HTTP authentication.These might help.https://en.wikipedia.org/wiki/Basic_access_authenticationhttps://yabb.jriver.com/interact/index.php?topic=111986.0https://yabb.jriver.com/interact/index.php?topic=122106.0Authenticate will give you a 401 reply (Authorization Required). Pull the "www-authenticate" header and retrieve the Basic Realm. Then make an HTTP call passing the proper Authorization header from Realm, Username and Password (how you do this depends on the HTTP library you're using). Correct authorization will provide you with a Token and a ReadOnly value in the returned XML. If you're going to write, and do anything more than basic, you'll want MCWS to be configured with authentication, and you'll expect the server to not indicate it is in ReadOnly mode.