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POST
eth_getBlockTransactionCountByHash
curl --request POST \
  --url https://monad-testnet.core.chainstack.com/9c5b265f20b3ea5df4f54f70eb74b800/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "eth_getBlockTransactionCountByHash",
  "params": [
    "0xf3cf930f1b4d9637134d09f126c57c30c3f4f40edf10ba502486b26d14b4f944"
  ]
}
'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": "<string>"
}
Monad API method that returns the number of transactions in a block matching the given block hash. This method is useful for quickly determining the transaction count without retrieving the entire block data.
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​
Parameters

  • data — the 32-byte hash of the block.

​
Response

  • result — the number of transactions in the block, encoded as hexadecimal.

​
eth_getBlockTransactionCountByHash code examples

const { ethers } = require("ethers");

const provider = new ethers.JsonRpcProvider("CHAINSTACK_NODE_URL");

async function getBlockTransactionCount() {
  const blockHash = "0xf3cf930f1b4d9637134d09f126c57c30c3f4f40edf10ba502486b26d14b4f944";
  const count = await provider.send("eth_getBlockTransactionCountByHash", [blockHash]);
  console.log(`Transaction count: ${parseInt(count, 16)}`);
}

getBlockTransactionCount();

​
Use case

A practical use case for eth_getBlockTransactionCountByHash is monitoring network activity by tracking transaction counts in specific blocks, or validating block data integrity when you have a known block hash.

Body

application/json
​
id
integer
default:1
​
jsonrpc
string
default:2.0
​
method
string
default:eth_getBlockTransactionCountByHash
​
params
string[]

Response

200 - application/json

The number of transactions in the block.

​
jsonrpc
string
​
id
integer
​
result
string
Last modified on May 18, 2026