Yes, using postman, I can connect to the channel. For example
wss://contract.mexc.com/edge
Just click the "Connect" button and once it's connected paste the subscription message and click "Send" button. That's it. You got subscribe to the web-socket topic.
wss://contract.mexc.com/edge
{
"method": "sub.depth",
"param": {
"symbol": "BTC_USDT"
}
}
There are some articles on the internet claiming that Postman cannot subscribe to topics and such. It's wrong. It can without even the help of scripts and programming it can subscribe to web-socket topic.