To communicate with our backend API get your own API key here. Ignore "Allowed domains" fields it this case.
Then use @windy/pluginDataLoader module to retrieve the data. More info inside the plugin.html or in our Windy API documentation
Please note, that due to the strict licence conditions, any data retrieved from our backend API, MUST run on windy.com domain only.
See Windy Plugins API to have better idea how plugin system works or Windy API documentation