eth_estimateGas on Zircuit
Simulates a transaction and returns the gas it would consume, without broadcasting it. Wallets call this before signing to set a sensible gas limit.
It simulates once at current state, so a tx whose cost depends on other pending txs can be under-estimated — pad the result (e.g. +20%). On L2s the figure covers L2 execution only; the L1 data fee is added at inclusion.
Zircuit endpoint (public — no key)
https://rpc.nodeflare.app/zircuit/publicMethod
eth_estimateGas
Cost
5 CU
Chain ID
48900
Block time
~2 s
Finality
soft ~2 s · hard on zk-proof to L1
Contract calls on Zircuit
eth_call behaves as on OP-Stack chains. Fees in ETH; the L1 data component is small thanks to proof aggregation.
Parameters
[callObject]cURL
curl https://rpc.nodeflare.app/zircuit/public \
-X POST \
-H 'content-type: application/json' \
-d '{"jsonrpc":"2.0","method":"eth_estimateGas","params":[{"to": "0x0000000000000000000000000000000000000000", "data": "0x"}],"id":1}'ethers.js
import { ethers } from 'ethers';
const provider = new ethers.JsonRpcProvider(
'https://rpc.nodeflare.app/zircuit/public'
);
const result = await provider.send('eth_estimateGas', [{"to": "0x0000000000000000000000000000000000000000", "data": "0x"}]);Try it live
Runs the example above against the public Zircuit endpoint — straight from your browser.
eth_estimateGas on Zircuit — FAQ
How do I call eth_estimateGas on Zircuit?
POST a JSON-RPC 2.0 request with "method": "eth_estimateGas" to NodeFlare's Zircuit endpoint at https://rpc.nodeflare.app/zircuit/public. No API key is required for the public endpoint.
What does eth_estimateGas cost on the free tier?
eth_estimateGas is weighted at 5 compute units per call. The free tier includes 2,000,000 CU/month, so that is roughly 400,000 eth_estimateGas calls per month — no credit card.
Is eth_estimateGas available on the public Zircuit endpoint?
Yes. eth_estimateGas works on the public Zircuit endpoint (https://rpc.nodeflare.app/zircuit/public) with no API key, rate-limited per IP. A free key adds higher limits and a dedicated path.
Anything Zircuit-specific to know when using eth_estimateGas?
eth_call behaves as on OP-Stack chains. Fees in ETH; the L1 data component is small thanks to proof aggregation.
Call eth_estimateGas on Zircuit with a free key
2,000,000 compute units/month, heavy methods unlocked, every chain included. No credit card.
Get your free API key →eth_estimateGas on other chains