Very clear. Thank you!

Very clear. Thank you!

@Ondřej-Šutera
Thank you but what I would like to know is not method of contract other than subscription, but if it is ok for our client, a trade company, to subscribe, pay a fee and let us use their API Key for development, in terms of account usage rights.

We are a Japanese system vendor developing a trading system for a trading company.
At the request of the trading company, we are planning to display information retrieved from windy API on the screen of our system in order to visualize the operational status and risks of the vessels carrying their cargo.
In this case, can the trading company sign a paid subscription agreement with windy and use our account (API Key) for development and operation? Or will our company need to subscribe?