curl --location 'http://zetachain-athens-3.unifra.io/v1/{your-api-key}' \
--header 'Content-Type: application/json' \
--data '{
    "jsonrpc": "2.0",
    "method": "eth_getBalance",
    "params": [
        "0x735b14bb79463307aacbed86daf3322b1e6226ab",
        "latest"
    ],
    "id": 0
}'

{
    "jsonrpc": "2.0",
    "id": 0,
    "result": "0xf43fc2c04556980"
}

# conversion from hex string to decimal
dec = int("hex strong response",16)

# conversion from Wei to to ETH
ethBalance = dec*(10**18)Parameters
DATA, 20 Bytes - address to check for balance.
QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the
default block parameter
.
params: [
   '0x6b00c03e0b14b98c92c8a3696d67f752ca8cb3df',
   'latest'
]
Returns
QUANTITY - hex value of the current ETH balance for the given address, measured in wei.

Example

Request
curl http://zetachain-athens-3.unifra.io/v1/{your-api-key} \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0x735b14bb79463307aacbed86daf3322b1e6226ab", "latest"],"id":0}'
URL: https://linea-mainnet.unifra.io/v1/{your-api-key}
RequestType: POST
Body:
{
    "jsonrpc":"2.0",
    "method":"eth_getBalance",
    "params":[ "0x735b14bb79463307aacbed86daf3322b1e6226ab","latest"],
    "id":0
}
Result
{
    "jsonrpc": "2.0",
    "id": 0,
    "result": "0xf43fc2c04556980"
}
Converting eth_getBalance response into ETH
To convert the hex string response, measured in
Wei
  to a decimal value measured in ETH we need to complete two steps:
Convert the hex response into decimal (Wei)
Convert the
Wei
 decimal into ETH decimal (10^18 wei = 1 eth)
Depending on what library or language you are using, there are several options here.
# conversion from hex string to decimal
dec = int("hex strong response",16)

# conversion from Wei to to ETH
ethBalance = dec*(10**18)