// Request
curl https://merlin.blockpi.network/v1/rpc/your-rpc-key -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":1}'
// Result
{
"jsonrpc": "2.0",
"id": 1,
"result": "v1.2.2-1-g4fd1296e"
}