curl --request POST \
  --url https://beaconcha.in/api/v2/ethereum/validators/apy-roi \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "validator": {
    "validator_identifiers": [
      1
    ]
  },
  "range": {
    "evaluation_window": "24h"
  },
  "chain": "mainnet"
}
'

{
  "data": {
    "execution_layer": {
      "roi": {
        "total": 0.15,
        "missed": -0.02
      },
      "apy": {
        "total": 2.76,
        "missed": -0.5
      }
    },
    "consensus_layer": {
      "roi": {
        "total": 0.15,
        "missed": -0.02
      },
      "apy": {
        "total": 2.76,
        "missed": -0.5
      }
    },
    "combined": {
      "roi": {
        "total": 0.15,
        "missed": -0.02
      },
      "apy": {
        "total": 2.76,
        "missed": -0.5
      }
    },
    "finality": "finalized"
  },
  "range": {
    "slot": {
      "start": 1,
      "end": 1
    },
    "epoch": {
      "start": 1,
      "end": 1
    },
    "timestamp": {
      "start": 1,
      "end": 1
    }
  }
}