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eth_feeHistory

Returns transaction base fee per gas and effective priority fee per gas for the requested/supported block range.

Reference: Here

Parameters:

blockCount - Integer number of blocks in the requested range. Between 1 and 1024 blocks can be requested in a single query. If blocks in the specified block range are not available, then only the fee history for available blocks is returned.
newestBlock - String representing the highest number block of the requested range, or one of the string tags latest, earliest, or pending.
rewardPercentiles - (optional) A monotonically increasing list of percentile values to sample from each block's effective priority fees per gas in ascending order, weighted by gas used.

Returned Value:

oldestBlock - Lowest number block of the returned range expressed as a hexadecimal number.
baseFeePerGas - An array of block base fees per gas, including an extra block value. The extra value is the next block after the newest block in the returned range.
gasUsedRatio - An array of block gas used ratios. These are calculated as the ratio of gasUsed and gasLimit.
reward - An array of effective priority fee per gas data points from a single block. All zeroes are returned if the block is empty.
{
"jsonrpc": "2.0",
"result": {
"baseFeePerGas": [
"0x3da8e7618",
"0x3e1ba3b1b",
"0x3dfd72b90",
"0x3d64eee76",
"0x3d4da2da0",
"0x3ccbcac6b"
],
"gasUsedRatio": [
0.5290747666666666,
0.49240453333333334,
0.4615576,
0.49407083333333335,
0.4669053
],
"oldestBlock": "0xfab8ac",
"reward": [
[
"0x59682f00",
"0x59682f00"
],
[
"0x59682f00",
"0x59682f00"
],
[
"0x3b9aca00",
"0x59682f00"
],
[
"0x510b0870",
"0x59682f00"
],
[
"0x3b9aca00",
"0x59682f00"
]
]
},
"id": 0
}
mainnet
testnet
curl https://mainnet.hedera.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_feeHistory","params":[{see above}],"id":1}'
curl https://testnet.hedera.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_feeHistory","params":[{see above}],"id":1}'