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Update to Binance USDⓈ-M Futures WebSocket System Upgrade Notice (2026-03-06), Base URL Split & Migration #562

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@movy

As per announcement: https://developers.binance.com/docs/derivatives/USDS-margined-futures/websocket-market-streams/Important-WebSocket-Change-Notice

As of YESTERDAY, subscriptions requests like wss://fstream.binance.com/stream?streams=btcusdt@kline_1h no longer work and need to have base URL, e.g. wss://fstream.binance.com/market/stream?streams=btcusdt@kline_1h. I can see that Jesse merges all streams subscriptions (mark prices, candles etc) in a single request:

wss://fstream.binance.com/stream?streams=kncusdt@markPrice@1s/zilusdt@markPrice@1s/tusdt@markPrice@1s/tlmusdt@markPrice@1s/ustcusdt@markPrice@1s/1000satsusdt@markPrice@1s/sklusdt@markPrice@1s/iotxusdt@markPrice@1s/roseusdt@markPrice@1s/listausdt@markPrice@1s/usualusdt@markPrice@1s/zrxusdt@markPrice@1s/mavusdt@markPrice@1s/auctionusdt@markPrice@1s/neousdt@markPrice@1s/sandusdt@markPrice@1s/vanausdt@markPrice@1s/tiausdt@markPrice@1s/altusdt@markPrice@1s/strkusdt@markPrice@1s/ckbusdt@markPrice@1s/seiusdt@markPrice@1s/ognusdt@markPrice@1s/xvsusdt@markPrice@1s/linkusdt@markPrice@1s/rezusdt@markPrice@1s/fetusdt@markPrice@1s/aceusdt@markPrice@1s/rareusdt@markPrice@1s/gmtusdt@markPrice@1s/manausdt@markPrice@1s/1000flokiusdt@markPrice@1s/linkusdt@kline_1h/listausdt@kline_1h/seiusdt@kline_1h/ustcusdt@kline_1h/sandusdt@kline_1h/ckbusdt@kline_1h/fetusdt@kline_1h/gmtusdt@kline_1h/usualusdt@kline_1h/rezusdt@kline_1h/aceusdt@kline_1h/zilusdt@kline_1h/strkusdt@kline_1h/1000flokiusdt@kline_1h/auctionusdt@kline_1h/zrxusdt@kline_1h/sklusdt@kline_1h/tlmusdt@kline_1h/tusdt@kline_1h/1000satsusdt@kline_1h/neousdt@kline_1h/altusdt@kline_1h/xvsusdt@kline_1h/iotxusdt@kline_1h/rareusdt@kline_1h/manausdt@kline_1h/vanausdt@kline_1h/mavusdt@kline_1h/tiausdt@kline_1h/ognusdt@kline_1h/kncusdt@kline_1h/roseusdt@kline_1h

This also will require fixing in some cases, as now we need to send subscription requests separately for streams that require different base urls. The request above, however, probably only requires /market as klines and markprices are on the same base url, see https://developers.binance.com/docs/derivatives/USDS-margined-futures/websocket-market-streams/Important-WebSocket-Change-Notice#examples

Sorry if it has been fixed already, but I saw no mention in releases section.

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