WebSocket リアルタイムマーケットデータ配信 API

WebSocket を利用するメリット

• Updates are pushed as prices change, which is more timely than polling REST on a timer and does not use your per-minute request allowance.
• One connection can subscribe to many symbols, and several connections can subscribe to the same symbol without affecting each other.
• The protocol is compatible with iTick, so existing subscription code only needs a new endpoint.

メッセージフォーマット

// Subscribe / unsubscribe. types: tick, quote, depth, kline@1
{"ac":"subscribe","params":"AAPL$US,700$HK","types":"quote,tick"}
{"ac":"unsubscribe","params":"AAPL$US","types":"quote"}

// Heartbeat
{"ac":"ping","params":"1731688569840"}

// Pushed message
{"code":1,"data":{"s":"BTCUSDT","r":"BA","ld":83988.54,"v":0.00019,"type":"tick"}}

JavaScript 実装サンプル

const ws = new WebSocket("wss://api.itick.dev/crypto?token=YOUR_API_KEY");

ws.onopen = () => {
  ws.send(JSON.stringify({ ac: "subscribe", params: "BTCUSDT$BA", types: "quote,tick" }));
  // Send a heartbeat at least every 30 seconds
  setInterval(() => ws.send(JSON.stringify({ ac: "ping", params: String(Date.now()) })), 25000);
};

ws.onmessage = (event) => console.log(event.data);

対応マーケット

Connect to wss://api.itick.dev/{market} where market is stock, forex, crypto, indices, future or fund. Available data depends on your plan.

接続数・購読銘柄数の上限

Concurrent connections per API key per market and symbols per connection are set by your plan; see pricing. The free plan does not include WebSocket by default.

よくある質問（FAQ）