POST error: Invalid transport

You seem to have not included a copy of your HTTP Post body for us to debug, so I’m guessing you didn’t send any at all. So that is likely your problem. You didn’t ask for a topic or specify a transport.

Here is a nodeJS example from my github

Relevant snippet

    var json = {
        type,
        version: "1",
        condition,
        transport: {
            method: 'webhook',
            callback: 'some url',
            secret: 'some jibberish'
        }
    };