Prediction Markets Datastream

Public Beta — Prediction market rooms use the same Datastream hub as other Solana Tracker streams.
Connect to wss://datastream.solanatracker.io/{apiKey} with your Data API key.

Instead of polling the Prediction Markets REST API, join pm:* rooms and receive trades, prices, books, and volume as they happen. Delivery is at-least-once across failover — deduplicate with data.sourceId / tradeId when present. Room data is flat: payload fields sit at the top level beside type, channel, exchange, marketId, and timestamp.

Connecting

const ws = new WebSocket("wss://datastream.solanatracker.io/YOUR_API_KEY");

ws.onopen = () => {
  ws.send(JSON.stringify({ type: "join", room: "pm:trades" }));
  ws.send(JSON.stringify({
    type: "join",
    room: "pm:market:polymarket:YOUR_TOKEN_ID:prices"
  }));
};

ws.onmessage = (event) => {
  const msg = JSON.parse(event.data);
  if (msg.type === "message") console.log(msg.room, msg.data);
};

Join / leave:

{ "type": "join", "room": "pm:trades" }
{ "type": "leave", "room": "pm:trades" }

Room types

Room	Purpose
`pm:trades`	Full trade tape (all exchanges)
`pm:trades:significant`	Trades with notional ≥ $25
`pm:{exchange}:trades`	e.g. `pm:polymarket:trades`
`pm:market:{exchange}:{marketId}:trades`	Single-market tape
`pm:event:{exchange}:{eventId}:trades`	All markets under one event
`pm:market:{exchange}:{tokenId}:prices`	Live top-of-book mid (+ `displayPrice`)
`pm:market:{exchange}:{tokenId}:quotes`	Streaming size-aware VWAP ladder
`pm:market:{exchange}:{tokenId}:orderbook`	Full book snapshots
`pm:event:{exchange}:{eventId}:volume`	Live cumulative USD volume for an event
`pm:market:{exchange}:{tokenId}:volume`	Live cumulative USD volume for one outcome
`pm:crypto:{asset}`	Chainlink underlying (BTC/ETH/…) — not outcome chance
`pm:market_lifecycle` / `pm:resolution`	Lifecycle and resolution fan-out

There is no broad pm:prices firehose — prices, quotes, orderbooks, and volume are market- or event-scoped only. notionalUsd is price × quantity (USD). The significant room uses threshold $25. Event rooms fan out under every identity on the payload (eventId, eventSlug, gammaEventId, Kalshi eventTicker), so slug-based and gamma-id joins both work.

Volume example

Crypto 5m windows — join with the event slug:

{ "type": "join", "room": "pm:event:polymarket:btc-updown-5m-1785347100:volume" }

{
  "type": "message",
  "room": "pm:event:polymarket:btc-updown-5m-1785347100:volume",
  "data": {
    "type": "volume",
    "channel": "volume",
    "exchange": "polymarket",
    "marketId": "{tokenId}",
    "timestamp": 1785347120123,
    "eventId": "btc-updown-5m-1785347100",
    "volume": 48210.55,
    "marketVolume": 24105.27,
    "delta": 42.5
  }
}

Volume frames are latest-wins. Fields: volume (event total when eventId is set), marketVolume, delta, eventId.

Quotes vs REST

Join pm:market:polymarket:{tokenId}:quotes for a streaming size-aware VWAP ladder. For arbitrary sizes use REST GET /v1/markets/{id}/quote on prediction-market-api.solanatracker.io.

Prices vs crypto underlying

Feed	Room	Meaning
Outcome chance	`pm:market:polymarket:{tokenId}:prices`	CLOB top-of-book mid
Underlying	`pm:crypto:{asset}` / `pm:crypto:{asset}:prices`	Chainlink USD ticks

IDs

Room segments are lowercase.
Polymarket market rooms require decimal CLOB token IDs (not 0x condition ids).
Kalshi tickers appear uppercase in many REST payloads but lowercase in room names.

API reference

In the Datastream nav, Prediction Market rooms are grouped as:

Group	Rooms
Prediction Markets — Trades	`pm:trades`, significant, exchange / market / event trades
Prediction Markets — Prices	market prices, quotes, orderbook
Prediction Markets — Volume	event and market volume
Prediction Markets — Lifecycle	lifecycle and resolution
Prediction Markets — Crypto	`pm:crypto:{asset}`
Prediction Markets — Feeds	exchange, market, event, type, category, series, status, sport

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