Tag Metrics

Room ID: polymarket_tag_metrics
Endpoint: wss://api.struct.to/ws
Rate: 0.025 credits per message

Stream real-time volume, fee, and activity metrics aggregated by tag, across multiple timeframes. One event is pushed per timeframe window on each update, with a separate breakdown for builder-attributed activity. The tags filter is required and must be non-empty. Tags are matched case-insensitively against either label or slug.

Filters

Filter	Type	Required	Description
`tags`	`string[]`	Yes	Tag labels or slugs to track
`subscribe_all`	`boolean`	No	Firehose: receive metrics for every tag. The `tags` filter is ignored when set; the `timeframes` filter still applies

Example

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

{
  "type": "room_message",
  "payload": {
    "room_id": "polymarket_tag_metrics",
    "message": {
      "action": "subscribe",
      "tags": ["Politics", "Crypto"]
    }
  }
}

Response

{
  "type": "tag_metrics_stream_subscribe_response",
  "room_id": "polymarket_tag_metrics",
  "data": {
    "tags": ["politics", "crypto"],
    "rejected": [],
    "error": null
  }
}

Events

`tag_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.

Emitted once per timeframe window each time the underlying tag metrics change. Timeframe values: 1m, 5m, 30m, 1h, 6h, 24h, 7d, 30d.

{
  "type": "tag_metrics_update",
  "room_id": "polymarket_tag_metrics",
  "data": {
    "tag": "politics",
    "timeframe": "1h",
    "timestamp": 1743500000,
    "usd_volume": "120000.00",
    "shares_volume": "148000.00",
    "builder_usd_volume": "30000.00",
    "builder_shares_volume": "37000.00",
    "fees": 600.0,
    "builder_fees": 150.0,
    "txns": 740,
    "builder_txns": 185,
    "unique_traders": 210,
    "unique_builder_traders": 54
  }
}

USD and shares volumes are decimal strings to preserve precision. Builder-attributed fields cover the subset of activity routed through builder-signed orders.

Last modified on July 13, 2026

Position Metrics

Trader PnL

Introduction

Rooms

Alerts

Filters

Example

Response

Events

`tag_metrics_update`

​Subscribe

​Filters

​Example

​Response

​Events

​tag_metrics_update

Subscribe

Filters

Example

Response

Events

`tag_metrics_update`