Method eth_getBalance undefined ()
connect with JSON-RPC protocol

Parameters

DATA - string

address to check for balance.

QUANTITY|TAG - string

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

Request

curl --location --request POST 'https://optimism.getblock.io/mainnet/' 
--header 'x-api-key: YOUR-API-KEY' 
--header 'Content-Type: application/json' 
--data-raw '{"jsonrpc": "2.0",
"method": "eth_getBalance",
"params": ["0xbec4e80531dad6a9989828d174cc2878b1e3123d", "latest"],
"id": "getblock.io"}'

Response

{
    "id": "getblock.io",
    "jsonrpc": "2.0",
    "result": "0x0"
}