RPC method

eth_getBlockByNumber on Monad

Supported on SwiftNodes

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

What eth_getBlockByNumber does

Returns a block by number or tag (latest, safe, finalized, pending, earliest): the header, and either the transaction hashes or the full transactions. Indexers, explorers and wallets use it to follow the chain.

eth_getBlockByNumber on Monad: what we measured

Header fields	26
Transactions per block	16, 11, 25, 20, 9 in five consecutive blocks
Response size, full transactions (true)	65.3 KB average
Response size, hashes only (false)	2.9 KB
Gas limit	150,000,000
Gas used in the latest block	10,194,849 (6.8% of the limit)
Base fee	100 gwei
Tag "safe"	block 113,043,835
Tag "finalized"	block 113,043,839
Tag "pending"	block 113,043,845
Tag "earliest"	block 0

What is different on Monad

The header includes the fields added by London (EIP-1559 base fee), Shanghai (withdrawals), Cancun (EIP-4844 blob gas), Cancun (EIP-4788 beacon root), Prague (EIP-7685 requests). Code that assumes Ethereum's current header shape will parse it as is.

Asking for full transactions (second parameter true) made the response 22.9 times larger than hashes only. If you need only some transactions, fetch hashes and request those transactions or their receipts individually.

A real Monad block header

From block 113,043,817, as our endpoint returned it (long hex values shortened).

{
  "hash": "0xdb87fe66e57edf2a6def559f850b1748b6d0af163f7e99367322b2595095c406",
  "parentHash": "0x513e15df5a082b0c8ede71c0b8ee60711c37b6df9f748b57f7c2efd791a5fcad",
  "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
  "miner": "0x86868bb556dedcd0768854a5af9e62f2e9129d46",
  "stateRoot": "0xe66e605e7642a0e7b19d0a857b0f620877ad0a1d0e6032d022186ea8a720cb75",
  "transactionsRoot": "0x5c736a838bcbe70577fb5a086357cc12d5df57056c845cee1e980e5b6ef4b579",
  "receiptsRoot": "0xb45844d1322477c4232ab40af7bc08120d729b263f8c1ae821725e017db13e3e",
  "logsBloom": "0x8422010008240044…(256 bytes)",
  "difficulty": "0x0",
  "number": "0x6bce969",
  "gasLimit": "0x8f0d180",
  "gasUsed": "0x9b8fa1",
  "timestamp": "0x6ace275a",
  "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "mixHash": "0x26cee8ff2d776ae554b41eab6f88785add9fba6b3de866042f00a0a7ffdd9e09",
  "nonce": "0x0000000000000000",
  "baseFeePerGas": "0x174876e800",
  "withdrawalsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
  "blobGasUsed": "0x0",
  "excessBlobGas": "0x0",
  "parentBeaconBlockRoot": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "requestsHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "totalDifficulty": "0x0",
  "size": "0x7250",
  "uncles": [],
  "transactions": "16 transactions"
}

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_getBlockByNumber","params":["latest",false]}'

import { createPublicClient, http } from "viem";

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

// Header plus transaction hashes (2.9 KB)
const block = await client.getBlock({ blockTag: "latest" });

// With full transactions (65.3 KB on average on Monad)
const full = await client.getBlock({ blockNumber: block.number, includeTransactions: true });

// A block that will not be reorganised
const final = await client.getBlock({ blockTag: "finalized" });

Other methods on Monad

eth_blockNumberSupported
eth_chainIdSupported
eth_getBalanceSupported
eth_getTransactionByHashSupported
eth_getTransactionReceiptSupported
eth_callSupported
eth_estimateGasSupported
eth_gasPriceSupported
eth_maxPriorityFeePerGasSupported
eth_sendRawTransactionSupported
eth_getTransactionCountSupported
eth_getCodeSupported
eth_subscribeSupported
eth_getLogsSupported
eth_getBlockReceiptsSupported
eth_feeHistorySupported
eth_getProofNot available
eth_createAccessListSupported
debug_traceCallNot available
trace_blockNot available
trace_transactionNot available

eth_getBlockByNumber on other chains

Frequently asked questions

Does Monad support eth_getBlockByNumber?

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

How many transactions are in each Monad block?

In five consecutive blocks on 2026-10-13: 16, 11, 25, 20, 9.

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.