curl --request GET \
  --url https://tonapi.io/v2/blockchain/validators

{
  "elect_at": 123456789,
  "elect_close": 123456789,
  "min_stake": 123456789,
  "total_stake": 123456789,
  "validators": [
    {
      "address": "0:55e8809519cd3c49098c9ee45afdafcea7a894a74d0f628d94a115a50e045122",
      "adnl_address": "10C1073837B93FDAAD594284CE8B8EFF7B9CF25427440EB2FC682762E1471365",
      "stake": 123456789,
      "max_factor": 123456789
    }
  ]
}

{
  "error": "<string>",
  "error_code": 123
}