> ## Documentation Index
> Fetch the complete documentation index at: https://docs.moralis.com/llms.txt
> Use this file to discover all available pages before exploring further.

# eth_feeHistory

> Returns historical gas information for a range of blocks.

#### Path parameters

<ResponseField name="apiKey" type="string" required>
  Your API key for authentication
</ResponseField>

#### Request

<ResponseField name="blockCount" type="string" required>
  Number of blocks in the requested range
</ResponseField>

<ResponseField name="newestBlock" type="string" required>
  Highest number block of the requested range
</ResponseField>

<ResponseField name="rewardPercentiles" type="array">
  Array of percentile values to sample from each block's effective priority fees per gas
</ResponseField>

#### Example request `params`

```javascript theme={null}
[
  "0x4",
  "latest",
  [25, 75]
]
```

<RequestExample>
  ```shellscript curl theme={null}
  curl https://site1.moralis-nodes.com/arbitrum/:apiKey \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc": "2.0", "method": "eth_feeHistory", "params": ["0x4", "latest", [25, 75]], "id": 1}'
  ```
</RequestExample>

<ResponseExample>
  ```json JSON theme={null}
  {
    "jsonrpc": "2.0",
    "id": 1,
    "result": {
      "baseFeePerGas": [
        "0x7",
        "0x7",
        "0x7",
        "0x7",
        "0x7"
      ],
      "gasUsedRatio": [
        0.026089875,
        0.406803,
        0.010817,
        0.5
      ],
  	"baseFeePerBlobGas": [
  		"0x3319eb",
  		"0x350c54",
  		"0x364072",
  		"0x364072",
  		"0x32279d"
  	],
  	"blobGasUsedRatio": [
  		0.47619047619047616,
  		0.2857142857142857,
  		0,
  		0.3333333333333333
  	],
      "oldestBlock": "0x11b9231",
      "reward": [
        ["0x4a817c800", "0x4a817c800"],
        ["0x773593c0", "0x773593c0"],
        ["0x0", "0x0"],
        ["0x0", "0x0"]
      ]
    }
  }
  ```
</ResponseExample>