curl --request GET \
  --url https://api.range.org/v1/network/net-flow-by-protocol \
  --header 'X-API-KEY: <api-key>'

{
  "total": 123,
  "balances": [
    {
      "denom": "<string>",
      "net_balance_change": 123,
      "date": "<string>",
      "total_received": 123,
      "total_sent": 123
    }
  ]
}