Method eth_getBalance Rootstock (RSK)
connect with JSON-RPC protocol

Parameters

DATA - string

address to check for balance.

QUANTITY|TAG - integer or string

block number or "latest", "earliest" or "pending"

Request

wscat -c wss://rsk.getblock.io/YOUR-API-KEY/mainnet/ 
# wait for connection and send the request body 
{"jsonrpc": "2.0",
"method": "eth_getBalance",
"params": ["0x8afad2f417e5132ee983b74d28600c0dedcc3e07", "latest"],
"id": "getblock.io"}

Response

{
    "id": "getblock.io",
    "jsonrpc": "2.0",
    "result": "0x10a160a214bbdf6ba"
}