Real-time WebSocket
Predexon streams every Polymarket trade, price change, and orderbook update over a single WebSocket connection. Our mempool-aware pipeline pushes events before they confirm on-chain — up to 5 seconds ahead of Polymarket's own real-time data service.
Seven channels cover the full market surface: trades, on-chain activity, orderbook depth, market lifecycle, UMA oracle events, collateral flows, and Chainlink crypto prices. Flat pricing by plan, no per-message metering, and no surprise egress bills.
Every fill as it happens — filter by wallet, market, or condition
Splits, merges, redemptions, and conversions as they land
Live L2 depth updates — placements, cancels, and modifications
Market creation and resolution events
UMA proposals, disputes, and settlements
pUSD collateral flows, plus Chainlink price ticks
import websockets, json, asyncio
async def main():
async with websockets.connect(
"wss://wss.predexon.com/v1/<your-api-key>"
) as ws:
await ws.send(json.dumps({
"action": "subscribe",
"type": "market_trades",
"markets": ["<market-slug>"],
}))
async for msg in ws:
print(json.loads(msg))
asyncio.run(main())Predexon's pipeline watches the mempool and streams pending transactions before they confirm on-chain, delivering updates up to 5 seconds ahead of Polymarket's official real-time data service.
The WebSocket currently streams Polymarket (all seven channels) plus Chainlink crypto price ticks. Kalshi, Opinion, Limitless, and Predict.fun are covered by Predexon's REST API and tick-history downloads.
Seven channels: trades, activity (splits, merges, redemptions), orderbook depth, market lifecycle, UMA oracle events, collateral flows, and Chainlink crypto prices. Subscribe to any combination, filtered by wallet, market, or condition.
Flat monthly pricing by plan with no per-message or egress charges. WebSocket access starts on the Dev plan ($49/mo, 10 subscriptions per connection); Pro raises limits to 100 subscriptions with wildcards. See the pricing page for details.
Yes — pair the live feed with Predexon's REST API for trade and price history back to 2020, and with orderbook tick history downloads for full-depth book replay.
Tick-level orderbook history, the fastest WebSocket, and blockchain-indexed analytics for every major prediction market — through one clean, predictable API.