I have been trying to pull the validator-level data for Polkadot for a project I am working on. I am using this API and have been unable to find a command I need. Ideally, the request URL would either return the number of validators for each day/era/epoch (any of those work), or even better, would return validator-level information for each validator staking during each day/era/epoch. I see requests for current validator information, but I can't see how to access historical data.
Does anyone know of a request URL that would work for this, or another API which would have this information? Thanks in advance!