RPC method

eth_maxPriorityFeePerGas on Morph

Supported on SwiftNodes

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

What eth_maxPriorityFeePerGas does

Returns the node's suggested priority fee (tip) per gas for an EIP-1559 transaction, in wei. Libraries such as viem and ethers fill maxPriorityFeePerGas from it by default, so its accuracy decides what your users pay.

eth_maxPriorityFeePerGas on Morph: what we measured

Suggested tip	0 wei
Median tip paid (median of the per-block medians, last 20 blocks)	0 wei
Base fee	0.00100 gwei

Should you use the suggestion?

The suggestion is in line with the tips actually paid on Morph, so the library default is fine.

Chains where the suggested tip is far above what is paid

On 28 of the chains we measure, the suggested tip was at least ten times the median tip paid (or the median paid was zero).

Example request

curl -s https://rpc.swiftnodes.io/rpc/morph?key=YOUR_API_KEY \
  -X POST -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_maxPriorityFeePerGas","params":[]}'

import { createPublicClient, http } from "viem";

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

// Tip from what recent blocks paid, not the node's suggestion
const { reward } = await client.getFeeHistory({ blockCount: 20, rewardPercentiles: [50] });
const tips = reward!.map((r) => r[0]).sort((a, b) => (a < b ? -1 : a > b ? 1 : 0));
const maxPriorityFeePerGas = tips[Math.floor(tips.length / 2)];

await wallet.sendTransaction({ to, value, maxPriorityFeePerGas });

Other methods on Morph

eth_maxPriorityFeePerGas on other chains

Frequently asked questions

Does Morph support eth_maxPriorityFeePerGas?

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

What priority fee should I use on Morph?

The median tip paid over the last 20 blocks was 0 wei on 2026-10-13; the node suggested 0 wei. Take the tip from eth_feeHistory percentiles.

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

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