eth_chainId

POST

Returns the chain ID of the network the node is connected to as a hexadecimal string. The chain ID is the network identifier defined in EIP-155, used for transaction signing to prevent replay attacks.

Path Parameters

chainstringrequired

Parameter specifying the target chain to query.

networkstringrequired

Parameter specifying the network of the target chain.

Responses

codestringrequired

Code identifying the cause of the failed request.

messagestringrequired

Detailed message including the name and value of the invalid parameter.

{
  "code": "ERROR_CODE",
  "message": "Unauthorized"
}

X-API-KEY

cURL

curl -X POST 'https://ethereum-mainnet.nodit.io' \
  -H 'Content-Type: application/json' \
  -H 'X-API-KEY: nodit-demo' \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_chainId",
    "params": []
  }'