Room ID: polymarket_event_metrics
Endpoint: wss://api.struct.to/ws
Rate: 0.025 credits per message
Subscribe
The event_slugs filter is required. You may optionally specify timeframes to limit which windows you receive.
Filters
| Filter | Type | Required | Description |
|---|
event_slugs | string[] | Yes | Events to track by slug |
timeframes | string[] | No | Timeframe 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
Volume on Polymarket vs. Struct. Polymarket’s UI reports “volume” as notional (the count of shares or contracts traded), which corresponds to shares_volume in Struct payloads. usd_volume is the dollar value of those trades. Use shares_volume to match figures shown on Polymarket and usd_volume for true USD throughput.
{
"type": "event_metrics_update",
"room_id": "polymarket_event_metrics",
"data": {
"event_slug": "us-presidential-election-2026",
"timeframe": "1h",
"timestamp": 1743500000,
"usd_volume": "2500000.00",
"shares_volume": "3850000.00",
"builder_usd_volume": "620000.00",
"builder_shares_volume": "955000.00",
"fees": 5000.0,
"builder_fees": 1240.0,
"txns": 12400,
"builder_txns": 3100,
"unique_traders": 3200,
"unique_builder_traders": 820
}
}
