RPC method

eth_estimateGas on Monad

Supported on SwiftNodes

Everything below was measured on 2026-10-13 by calling eth_estimateGas on Monad through the same endpoint customers use, and is re-measured weekly.

What eth_estimateGas does

Runs a transaction against current state and returns the gas it would use, so you can set a gas limit. If the transaction would revert or the sender cannot pay, the node returns an error instead of a number.

eth_estimateGas on Monad: what we measured

Zero-value MON transfer to an EOA	21,000 gas
Same on Ethereum	21,000 gas
1 wei from an empty account	user-specified gas exceeds provider limit

What the numbers mean

A plain transfer estimates at exactly 21,000 gas on Monad, as on Ethereum. Contract calls vary with state, so estimate those rather than hard-coding a limit.

An estimate for a sender that cannot pay fails with: "user-specified gas exceeds provider limit". Your app sees this text when a user's balance is too low, so match on it to show a clear message.

Chains where a transfer is not 21,000 gas

Of the 53 chains we measure, 6 estimate a plain transfer at something other than 21,000 gas.

Example request

curl -s https://rpc.swiftnodes.io/rpc/monad?key=YOUR_API_KEY \
  -X POST -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_estimateGas","params":[{"from":"0x0000000000000000000000000000000000000000","to":"0x000000000000000000000000000000000000dEaD","value":"0x0"}]}'

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://rpc.swiftnodes.io/rpc/monad?key=YOUR_API_KEY"),
});

const gas = await client.estimateGas({ account: from, to, value });
// Add headroom: state can change between estimate and inclusion
const gasLimit = (gas * 120n) / 100n;

Other methods on Monad

eth_estimateGas on other chains

Frequently asked questions

Does Monad support eth_estimateGas?

Yes. eth_estimateGas answered on the SwiftNodes Monad endpoint when our weekly probe called it through the customer path (2026-10-13).

How much gas does a plain transfer use on Monad?

eth_estimateGas returned 21,000 for a plain transfer on 2026-10-13.

Monad endpoints, live block height and WebSocket status are on the Monad RPC page.

One key covers every chain we serve, and SwiftNodes has a free tier.