> ## Documentation Index
> Fetch the complete documentation index at: https://docs.base.org/llms.txt
> Use this file to discover all available pages before exploring further.

# eth_getBalance

> Returns the ETH balance of an account at a given block. Use the pending tag for 200ms pre-confirmed balances.

Returns the ETH balance of an address at a given block.

<Tip>
  **Flashblocks:** Query `https://mainnet.base.org` with `"pending"` to read balances updated every \~200ms — before the block seals.
</Tip>

## Parameters

<ParamField body="address" type="string" required>
  The 20-byte address to query.
</ParamField>

<ParamField body="block" type="string" required>
  Block number in hex, or `"latest"`, `"pending"`, `"safe"`, `"finalized"`, `"earliest"`. Use `"pending"` for pre-confirmed balance.
</ParamField>

## Returns

<ResponseField name="result" type="string">
  The balance in wei as a hexadecimal string.
</ResponseField>

## Example

<CodeGroup>
  ```bash Standard (latest) theme={null}
  curl https://mainnet.base.org \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{
      "jsonrpc": "2.0",
      "method": "eth_getBalance",
      "params": ["0x742d35Cc6634C0532925a3b8D4C9dD0b4f3BaEa", "latest"],
      "id": 1
    }'
  ```

  ```bash Flashblocks (pending, ~200ms) theme={null}
  curl https://mainnet.base.org \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{
      "jsonrpc": "2.0",
      "method": "eth_getBalance",
      "params": ["0x742d35Cc6634C0532925a3b8D4C9dD0b4f3BaEa", "pending"],
      "id": 1
    }'
  ```

  ```json Response theme={null}
  {
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x1a055690d9db80000"
  }
  ```
</CodeGroup>