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

Response​

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