Cant find exploerer api endpoints to consume sui validator datas

Hello dev, I am new to sui and needs some help.

I am trying to build a report dashboard for sui validator, for the following metrics:

  • Total staked and also stake changes over a given period
  • Rewards earned in USD so far
  • Projected rewards earned in USD (over 3months, 6months or 1 year)
  • Hardware cost estimation
  • Hardware providers used -, Terraswitch, Contabo, Cherry servers
  • Hardware cost - Operational expenditure and Rewards is the revenue. Using these two values,
  • calculate the profit/return on investment so far as well as projected profits(over 3months, 6months or 1 year)

But the problem now is, I cant seems to find their api endpoints and docs for nodes of validators.
I have developed the codes, I just need the endpoints to substitude into it.

Can anyone help with the endpoints to get the following parameters?

Thanks in advance.