There are tools out there that help with this, but the better ones like the one I linked use the API.
I don't know what will happen to them next month, but if you are thinking about it, keep in mind that they may not be around or work like they do today, and you may have to use other more convoluted tools.
The TL;DR is that they don’t want random organizations to try to geoengineer when we still are not sure about unintended consequences
The article talks about a start up company trying to reflect the sun