curl --request POST \
  --url 'https://rpc-mainnet.solanatracker.io/?api_key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": "db16f277-1a22-41ff-9f85-f37e2cd77900",
  "method": "getClusterNodes"
}
'

{
  "jsonrpc": "2.0",
  "id": "db16f277-1a22-41ff-9f85-f37e2cd77900",
  "result": [
    {
      "pubkey": "9QzsJf7LPLj8GkXbYT3LFDKqsj2hHG7TA3xinJHu8epQ",
      "gossip": "10.239.6.48:8001",
      "tpu": "10.239.6.48:8856",
      "rpc": "10.239.6.48:8899",
      "version": "1.0.0 c375ce1f",
      "featureSet": 123,
      "shredVersion": 123
    }
  ]
}