There is two things going on here.
First, a station marked as private cannot be accessed by anyone except the station owner. That’s clear.
Second, all public stations can be accessed via the API. At a Normal level any individual owner can access their data from their station. This access is free and is controlled by the Private Access Token/OAuth. If you want to access data from stations you don’t own, however, you have to enter into an Enterprise agreement with WeatherFlow. This costs $$$.
At the moment the development API key remains an Enterprise level key. However, this will very likely change in the future as indicated by:
- Please be aware that rights to data access my be revoked at any time for any reason. This may include, but not limited to, the number of stations accessible per key, frequency of requests, and volume of data.