Try this endpoint: https://api.99stack.com/v1/availability/list
{
"GEN_1": 0.4,
"GEN_2": 0.98,
"GEN_3": 0
}
It show a range from 0 to 1 where a higher number means higher availability. Unfortunately it's only shown as percent and not the supply. But it'll give a hint on where you have the best chance of a successful deployment.