eth_feeHistory on Unichain
Returns base fees and priority-fee percentiles over a range of recent blocks — used to build fee oracles and gas-estimation UIs.
The raw material for a fee oracle: base fees plus your chosen reward percentiles per block. Request a modest blockCount (5–20); very long ranges are slow and rarely sharpen the estimate.
Unichain endpoint (public — no key)
https://rpc.nodeflare.app/unichain/publicMethod
eth_feeHistory
Cost
1 CU
Chain ID
130
Block time
~1 s
Finality
~1 s soft · L1-final ~13 min
Gas & fees on Unichain
Execution fees are tiny and priority fees near zero; the L1 data fee dominates calldata-heavy transactions. eth_gasPrice alone understates the true total — read receipts for real cost.
Parameters
[blockCount, newestBlock, rewardPercentiles[]]cURL
curl https://rpc.nodeflare.app/unichain/public \
-X POST \
-H 'content-type: application/json' \
-d '{"jsonrpc":"2.0","method":"eth_feeHistory","params":["0x5", "latest", [25, 50, 75]],"id":1}'ethers.js
import { ethers } from 'ethers';
const provider = new ethers.JsonRpcProvider(
'https://rpc.nodeflare.app/unichain/public'
);
const result = await provider.send('eth_feeHistory', ["0x5", "latest", [25, 50, 75]]);Try it live
Runs the example above against the public Unichain endpoint — straight from your browser.
eth_feeHistory on Unichain — FAQ
How do I call eth_feeHistory on Unichain?
POST a JSON-RPC 2.0 request with "method": "eth_feeHistory" to NodeFlare's Unichain endpoint at https://rpc.nodeflare.app/unichain/public. No API key is required for the public endpoint.
What does eth_feeHistory cost on the free tier?
eth_feeHistory is weighted at 1 compute unit per call. The free tier includes 2,000,000 CU/month, so that is roughly 2,000,000 eth_feeHistory calls per month — no credit card.
Is eth_feeHistory available on the public Unichain endpoint?
Yes. eth_feeHistory works on the public Unichain endpoint (https://rpc.nodeflare.app/unichain/public) with no API key, rate-limited per IP. A free key adds higher limits and a dedicated path.
Anything Unichain-specific to know when using eth_feeHistory?
Execution fees are tiny and priority fees near zero; the L1 data fee dominates calldata-heavy transactions. eth_gasPrice alone understates the true total — read receipts for real cost.
Call eth_feeHistory on Unichain with a free key
2,000,000 compute units/month, heavy methods unlocked, every chain included. No credit card.
Get your free API key →