eth_chainId

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

Parameters

None.

Returns

A hexadecimal of the current chain ID.

Example

Replace <YOUR-API-KEY> with an API key from your MetaMask Developer dashboard.

Request

curl

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

WSS

wscat -c wss://base-mainnet.infura.io/ws/v3/<YOUR-API-KEY> -x '{"jsonrpc": "2.0", "method": "eth_chainId", "params": [], "id": 1}'

Response

JSON

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