curl --request POST \
  --url https://rpc.quai.network/cyprus1/ \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "method": "quai_feeHistory",
  "params": [
    "0x2",
    "0x8",
    [
      2,
      4,
      6
    ]
  ],
  "id": 1
}'

{
  "jsonrpc": "2.0",
  "result": {
    "oldestBlock": "0x15d",
    "reward": [
      [
        "0x3b9aca00",
        "0x3b9aca00",
        "0x3b9aca00"
      ],
      [
        "0x3b9aca00",
        "0x3b9aca00",
        "0x3b9aca00"
      ]
    ],
    "baseFeePerGas": [
      "0x12",
      "0x10",
      "0x1e"
    ],
    "gasUsedRatio": [
      0.0441,
      0.0023625
    ]
  },
  "id": 1
}