Creating a Mandrill service

I couldn’t find anywhere in the Mandrill API docs that they allowed passing parameters in the URL. In fact, all of their examples involved POSTing a JSON body. However, you’re right! It does work. In fact, it worked right away for me, so I’m not sure what may be causing your issue.

Using the exact same Remote Web Service config as this post above, calling the same /users/ping2.json endpoint as this post above, instead of passing any JSON body I added this config to the service:

It immediately worked when I called /rest/mandrillapi/users/ping2.json

{
    "PING": "PONG!"
}

I recommend checking your config again, because this was almost too easy to get working!