How to Monitor WebSocket Connections for Real-Time Applications

If your application relies on WebSockets — chat applications, trading platforms, live dashboards, multiplayer games, collaborative tools — then HTTP monitoring alone is not enough. Your HTTP endpoint might return 200 OK while your WebSocket server is completely down. Users see a connected-looking interface that never receives real-time data.

Why WebSocket Monitoring Is Different

WebSocket connections are fundamentally different from HTTP requests. They are long-lived, bidirectional, and stateful. An HTTP health check confirms the server is running, but it does not verify that:

• The WebSocket handshake completes successfully (HTTP upgrade)
• The connection remains stable after opening
• Messages can be sent and received in both directions
• The server responds within acceptable latency

Setting Up WebSocket Monitoring in Monitorion

Go to Monitors → New Monitor → WebSocket and configure:

• URL — your WebSocket endpoint (e.g., wss://api.example.com/ws). Supports both ws:// and wss:// (TLS).
• Message to Send (optional) — a test message to send after connecting. The monitor verifies it receives a response.
• Expected Response (optional) — text the response should contain. Useful for echo servers or ping/pong protocols.
• Timeout — how long to wait for the handshake and response before marking the check as failed.

What Monitorion Checks

Each WebSocket check performs a complete lifecycle test:

1. DNS resolution — resolves the hostname
2. TCP connection — establishes the underlying connection
3. TLS handshake (for wss://) — validates the SSL certificate
4. WebSocket upgrade — performs the HTTP upgrade handshake
5. Message exchange — sends your test message and waits for a response
6. Clean close — properly closes the connection

The monitor reports: connection success/failure, latency (time from open to first message), and whether the expected response was received.

Monitoring Strategies

For chat applications: Send a ping message, expect a pong. Set a 60-second interval — chat users notice disconnections quickly.

For trading platforms: Send a subscribe message for a known instrument, verify you receive a price update. Use 30-second intervals — stale prices mean financial risk.

For live dashboards: Connect and verify any message is received within the timeout. If your dashboard pushes periodic updates, the monitor confirms data is flowing.

WebSocket monitoring is available on Pro plans. Set up your first WebSocket monitor and ensure your real-time features stay real-time.