eth_getTransactionCount - Validation Cloud

Returns the number of transactions sent from an address. This method will use 40 Compute Units.

Over HTTPS, Hyperliquid Mainnet returns the latest state for this method whatever block parameter you pass; a request for a past block does not fail, it answers with current data. Over WebSocket the request is served by nanoreth and a past block returns historical state.

Reference: Here

Parameters

DATA, 20 Bytes - address.
QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter

params: [
  "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
  "latest", // state at the latest block
]

Returns

QUANTITY - String hex value representing integer of the number of transactions sent from this address.

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x1" // 1
}

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_getTransactionCount","params":["0x407d73d8a49eeb85d32cf465507dd71d507100c1","latest"],"id":1}'