The Country Clubs access to API certainly has worked in the past, as this is how PGLS began its in-game evolution from what was a purely non-integrated origin back when we used either scorecard posting, or signing for each others scores to hold what were small-scale events way back in 2015.
Of course, with changes afoot, this may be different now but I can not see any reason for the same access to to be provided to someone who wished to set up their own Country Club events.
Be warned though... documentation on the API is very sparse, and being able to use the API successfully will rely on your knowledge of JSON outputs, database creation and being able to have a web presence which will handle the flow of data which the game creates. That, and endless patience as you test any number of scenarios with 'switch' elements within the API to get it working as you expect.
Andrew has been helpful in providing some feedback to questions when you really get stuck, and to reveal what parts of the API work and what parts sometimes need greater development to work correctly. However, with development now ongoing in PG2, and a new API possibly on the way at some point in the future, his time may well be more limited about being able to provide immediate support for anyone struggling to come to terms with the very basics of its implementation in its present form.