curl --request POST \
  --url https://api.mainnet.abs.xyz/eth_feeHistory \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_feeHistory",
  "params": [
    "10",
    "0x3039",
    [
      25,
      50,
      75
    ]
  ]
}'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "oldestBlock": "0x3030",
    "baseFeePerGas": [
      "0x7",
      "0x6",
      "0x6",
      "0x5",
      "0x4",
      "0x3",
      "0x3",
      "0x3",
      "0x3",
      "0x3",
      "0x3"
    ],
    "gasUsedRatio": [
      0.5,
      0.4,
      0.5,
      0.4,
      0.5,
      0.4,
      0.5,
      0.4,
      0.5,
      0.4
    ]
  }
}