无法连接wss://api.poloniex.com，请求排查问题及确认是否有更新

Let me break down what's likely happening here and how to fix it:

1. 问题根源：工具的局限性，而非你的操作错误 #

The websocket.org echo tool is built for testing generic echo WebSocket services—it sends whatever message you input and expects the server to bounce it back. But Poloniex's WebSocket API isn't an echo service; it requires specific initialization commands to start streaming data.

When you connect directly via the echo tool:

• The Poloniex server waits for a valid subscription/command message (like {"command":"subscribe","channel":1002} for global tickers)
• Since the echo tool doesn't send this required message, the server will close the connection after a timeout
• The echo tool can't properly interpret this silent disconnect, so it throws a vague ERROR: undefined

This isn't a mistake on your end—it's just the wrong tool for testing a specialized WebSocket API like Poloniex's.

2. Checking if Poloniex's WS Service Has Updates #

As of recent checks, Poloniex's primary WebSocket endpoint is still wss://api.poloniex.com, but it's smart to verify their official documentation for changes:

• They occasionally update API requirements (like adding authentication for private channels) or launch new channel types
• If you're trying to access private data (e.g., account balances), you'll need to send an authenticated command first—something the echo tool can't handle

3. 正确测试连接的方法 #

Use a more flexible WebSocket client instead:

• Chrome DevTools Console: Open the console, run const ws = new WebSocket('wss://api.poloniex.com');, then send a subscription with ws.send(JSON.stringify({"command":"subscribe","channel":1002})). You'll see ticker data start flowing in the console.
• Command-line tool (wscat): Install it via npm install -g wscat, then run wscat -c wss://api.poloniex.com. Once connected, paste the same subscription command to start receiving data.

If you still get errors after this, check Poloniex's status page or developer forums for any ongoing outages or API changes.

内容的提问来源于stack exchange，提问作者Mowshon