eth_getBlockTransactionCountByNumber - Validation Cloud

Returns the number of transactions in a block matching the given block number. This method will use 40 Compute Units.

Over HTTPS, Hyperliquid Mainnet keeps roughly 165 days of blocks, receipts and logs; requests for older blocks return JSON-RPC error -32603 with invalid block height. Over WebSocket the request is served by nanoreth, the HyperEVM archive client, and any block back to genesis is available.

Reference: Here

Parameters

QUANTITY|TAG - integer of a block number, or the string "earliest", "latest" or "pending", as in the default block parameter.

params: [
  "0xe8", // 232
]

Returns

QUANTITY - integer of the number of transactions in this block.

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0xa" // 10
}

curl https://mainnet.hyperliquid.validationcloud.io/v1/<YOUR_API_KEY_HERE>/evm \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getBlockTransactionCountByNumber","params":["0xe8"],"id":1}'