EVM

eth_chainId

Summary: Get chainId

This request returns the chain ID, a unique identifier across all EVM-compatible networks. This value is critical for transaction replay protection introduced by EIP-155.

Parameters

This method doesn't accept any parameters.

Returns

eth_chainIdResponse

string

Hexadecimal representation of the chain ID.

Pattern: ^0x([1-9a-f]+[0-9a-f]*|0)$

Customize request

Parameter

Value

Request

CURL

curl https://linea-mainnet.infura.io/v3/<YOUR-API-KEY> \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_chainId",
    "params": [],
    "id": 1
  }'

Example response

{
  "id": 1,
  "jsonrpc": "2.0",
  "result": "0xe728"
}