What is WebSocket close codes?

Cloudflare: Supports WebSocket on all plans, but free plans have lower connection limits and stricter idle timeouts. WebSocket connections count toward concurrent connection limits.
AWS CloudFront: Supports WebSocket since 2018. Requires the origin to use a matching protocol (WSS for HTTPS distributions). Idle timeout is configurable up to 60 seconds at the distribution level.
Fastly: Supports WebSocket passthrough. Connections bypass the cache entirely.

Understanding WebSocket Connection Errors and Close Codes is a common topic when working with HTTP and APIs. Understanding it helps you diagnose issues and choose the right status codes and headers. Use our Header Inspector and AI Inspector to analyze your requests and responses.

How can I debug WebSocket close codes?

Use the Header Inspector to inspect request and response headers, the Status Analyzer to send live requests, and the AI Inspector to get recommendations. Check the Knowledge Center for more guides.

Which tools on HttpStatus.com help with WebSocket close codes?

Header Inspector, Redirect Checker, AI Inspector, and the API Client are useful. Visit the relevant hub (e.g. CORS Hub, Redirect Hub) for more tools and references.

Where can I learn more about HTTP status codes?

Visit the Status codes reference and the HTTP Hub on HttpStatus.com for full documentation and interactive tools.

Understanding WebSocket Connection Errors and Close Codes