WebSocket tester
Connect to a public WebSocket endpoint and inspect its handshake, messages and close code.
Runs on the server
OutputText · 0 bytes
Your result will appear hereAdd your input, choose the options and run the tool.
This check runs on the server. Input and results are not saved as execution history; hosted allowances apply.
About WebSocket tester
Check a WebSocket upgrade and capture the first messages from your server.
When to use it
Check whether a real-time endpoint upgrades, sends an expected reply and closes cleanly.
wss://your-app.com/liveHow to use it
- Enter a public ws:// or wss:// URL.
- Optionally send one text or base64 message. Sign in to send messages.
- Review handshake timing, received messages and the close code.
Limits & privacy
Captures up to 10 messages of 16 KiB over three seconds after connecting. No redirects. Private addresses are blocked. Access tokens are sent only as X-Access-Token over WSS.
Use this tool from the API reference or connect through the SDK, CLI, SSH, or MCP. Hosted calls share your plan allowances.