New API connections

When you get a 404 it has nothing to do with the token. Even with a wrong token and wrong placement, you should get a 200 with an empty response object as long as the endpoint is correct:

"response": {
    "cursor": 0,
    "results": [],
    "remaining": 0,
    "count": 0

My guess is that the change has something to do with the changes to the free plan as api access is not included anymore: (see first post by Emmanuel)