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POST
/
efb0a5eccd2caa5135eb54eba6f7f300
eth_getBlockTransactionCountByHash
curl --request POST \
  --url https://optimism-mainnet.core.chainstack.com/efb0a5eccd2caa5135eb54eba6f7f300 \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "method": "eth_getBlockTransactionCountByHash",
  "id": 1,
  "params": [
    "0x7e4aea365093a183b0df5f003f26144ef04ec8a6e7f4910356590c5fc7b1671f"
  ]
}
'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": "<string>"
}

Documentation Index

Fetch the complete documentation index at: https://docs.chainstack.com/llms.txt

Use this file to discover all available pages before exploring further.

Optimism API method that retrieves the number of transactions in a block, identified by its hash. This method provides a way to know how many transactions were included in a specific block without retrieving the full block data.
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​
Parameters

  • hash — the hash of the block for which the transaction count is being queried, as a hexadecimal string.

​
Response

  • result — the number of transactions in the specified block, encoded as a hexadecimal string. This count includes all transactions that were part of the block when it was mined.

​
Use case

The eth_getBlockTransactionCountByHash method is particularly useful for applications that need to quickly assess the volume of transactions within specific blocks. For instance, analytics platforms may use this information to analyze network activity over time or to identify blocks that contain an unusually high or low number of transactions.

Body

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

Response

200 - application/json

The transaction count of the block by hash

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