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Room ID: polymarket_event_metrics
Endpoint: wss://api.struct.to/ws
Rate: 0.025 credits per message
Stream aggregated metric updates at the event level. This room provides volume, fee, and activity data rolled up across all markets within an event.

Subscribe

The event_slugs filter is required. You may optionally specify timeframes to limit which windows you receive.

Filters

FilterTypeRequiredDescription
event_slugsstring[]YesEvents to track by slug
timeframesstring[]NoTimeframe windows to receive updates for

Example

{
  "type": "join_room",
  "payload": {
    "room_id": "polymarket_event_metrics"
  }
}
{
  "type": "room_message",
  "payload": {
    "room_id": "polymarket_event_metrics",
    "message": {
      "action": "subscribe",
      "event_slugs": ["us-presidential-election-2026"]
    }
  }
}

Response

{
  "type": "event_metrics_stream_subscribe_response",
  "room_id": "polymarket_event_metrics",
  "data": {
    "event_slugs": ["us-presidential-election-2026"],
    "timeframes": [],
    "rejected": []
  }
}

Events

event_metrics_update

{
  "type": "event_metrics_update",
  "room_id": "polymarket_event_metrics",
  "data": {
    "event_slug": "us-presidential-election-2026",
    "timeframe": "1h",
    "timestamp": 1743500000,
    "usd_volume": "2500000.00",
    "fees": 5000.0,
    "txns": 12400,
    "unique_traders": 3200
  }
}
Last modified on April 13, 2026