eth_getBalance

curl --request POST \
  --url https://api.mainnet.abs.xyz/eth_getBalance \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_getBalance",
  "params": [
    "0x8fe5810cd78eb8d8b9abad8527dfc1265bee6c56",
    "latest"
  ]
}'

{
  "jsonrpc": "2.0",
  "result": "0x4563918244f40000",
  "id": 1
}