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kotlinlang

What tool do you use to monitor the websocket traffic sent/received by ktor client (android, ios)?
The "App inspector" tool from IDEA/AS does not intercept non HTTP traffic

proxyman is the goat. and support gets back to you like same day if you have an issue.

<@UN85K2RQR> thanks, indeed I tried it yesterday, it captured traffic from mobile Google chrome but not from my app, anyway I think I found the issue, will check soon

You need to enable it for your app via

Add a file res/xml/network_security_config.xml to your app:

<network-security-config>
  <debug-overrides>
    <trust-anchors>
      
      <certificates src="user" />
    </trust-anchors>
  </debug-overrides>
</network-security-config>

Then add a reference to this file in your app's manifest, as follows:

<?xml version="1.0" encoding="utf-8"?>
<manifest ... >
    <application android:networkSecurityConfig="@xml/network_security_config" ... >
        ...
    </application>
</manifest>