Polymarket WebSocket

wss://api.delphiterminal.co/ws/poly

{
  "action": "subscribe",
  "condition_ids": ["0x00000977017fa72fb6b1908ae694000d3b51f442c2552656b10bdbbfd16ff707"],
  "message_types": ["prices", "orderbook", "trades"]
}

{
  "action": "unsubscribe",
  "condition_ids": ["0x00000977017fa72fb6b1908ae694000d3b51f442c2552656b10bdbbfd16ff707"]
}

{
  "type": "prices",
  "data": {
    "exchange": "poly",
    "condition_id": "0x0000097701...",
    "price": 0.992,
    "last_update": "2026-02-04T15:30:00Z"
  }
}

{
  "type": "orderbook",
  "data": {
    "snapshot_time": "2026-02-04T15:30:00Z",
    "exchange": "poly",
    "market_id": "0x1234abcd...",
    "condition_id": "0x0000097701...",
    "bid_side": [0.55, 0.54, 0.53, 0.52, 0.51],
    "ask_side": [0.56, 0.57, 0.58, 0.59, 0.60],
    "original_last_update": "2026-02-04T15:29:59Z"
  }
}

{
  "type": "trades",
  "data": {
    "exchange": "poly",
    "condition_id": "0x0000097701...",
    "token_id": "0x123...",
    "market_id": "0xabc...",
    "price": 0.65,
    "size": 100.5,
    "side": "buy",
    "last_update": "2026-02-04T15:30:00Z"
  }
}

const ws = new WebSocket("wss://api.delphiterminal.co/ws/poly");

ws.onopen = () => {
  console.log("Connected to Polymarket WebSocket");

  ws.send(JSON.stringify({
    action: "subscribe",
    condition_ids: ["0x00000977017fa72fb6b1908ae694000d3b51f442c2552656b10bdbbfd16ff707"],
    message_types: ["prices", "orderbook", "trades"]
  }));
};

ws.onmessage = (event) => {
  const data = JSON.parse(event.data);

  if (data.type === "prices") {
    console.log("Price update:", data.data);
  } else if (data.type === "orderbook") {
    console.log("Orderbook update:", data.data);
  } else if (data.type === "trades") {
    console.log("Trade:", data.data);
  }
};

ws.onclose = () => console.log("Disconnected");
ws.onerror = (error) => console.error("WebSocket error:", error);