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Room ID: polymarket_asset_window_updates
Endpoint: wss://api.struct.to/ws
Rate: 0.025 credits per message
Stream candle open and close events for crypto assets. At least one of asset_symbols or timeframes is required.

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Subscribe

You must provide at least one filter. Specify the assets you want to track and the candle timeframes you are interested in.

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Filters

FilterTypeRequiredDescription
asset_symbolsstring[]At least one filter requiredAsset symbols to track, e.g. ["BTC", "ETH"]
timeframesstring[]At least one filter requiredOne or more of 5m, 15m, 1h, 4h, 1d, 24h

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Example

{
  "type": "join_room",
  "payload": {
    "room_id": "polymarket_asset_window_updates"
  }
}

{
  "type": "room_message",
  "payload": {
    "room_id": "polymarket_asset_window_updates",
    "message": {
      "action": "subscribe",
      "asset_symbols": ["BTC"],
      "timeframes": ["1h"]
    }
  }
}

​
Response

{
  "type": "asset_window_updates_stream_subscribe_response",
  "room_id": "polymarket_asset_window_updates",
  "data": {
    "asset_symbols": ["BTC"],
    "timeframes": ["1h"]
  }
}

​
Events

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asset_price_window_update

{
  "type": "asset_price_window_update",
  "room_id": "polymarket_asset_window_updates",
  "data": {
    "event_type": "window_update",
    "symbol": "BTC",
    "variant": "5m",
    "start_time": 1743499700000,
    "end_time": 1743500000000,
    "open_price": 97200.0,
    "close_price": 97250.50,
    "update_type": "open",
    "published_at": 1743500000000
  }
}
Last modified on April 13, 2026