curl --request GET \
  --url https://api.predexon.com/v2/polymarket/builders/{builder_code} \
  --header 'x-api-key: <api-key>'

{
  "builder_code": "<string>",
  "window": "<string>",
  "volume_usd": 123,
  "builder_fee_usd": 123,
  "platform_fee_usd": 123,
  "trade_count": 123,
  "unique_traders": 123,
  "unique_markets": 123,
  "current_taker_bps": 123,
  "current_maker_bps": 123,
  "first_seen_at": 123,
  "last_seen_at": 123,
  "fee_rate_history": [
    {
      "taker_bps": 123,
      "maker_bps": 123,
      "valid_from": 123,
      "valid_to": 123
    }
  ]
}