---
description: >-
  Returns the currently configured chain id, a value used in replay-protected
  transaction signing as introduced by EIP-155.
---

# chainId

### REQUEST

```
POST https://mainnet-slice-rpc.com
```

#### HEADERS

```
Content-Type: application/json
```

#### EXAMPLE

```
## JSON-RPC over HTTPS POST
curl https://mainnet-slice-rpc.com \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_chainId","params": [],"id":1}'

## JSON-RPC over WSS
wscat -c ws://mainnet-slice-rpc.com
>{"jsonrpc":"2.0","method":"eth_chainId","params": [],"id":1}
```

### RESPONSE

#### RESULT FIELDS

* `QUANTITY` - big integer of the current chain id.

#### BODY

```
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x1"
}
```
