What Is HTTP 505 HTTP Version Not Supported?
HTTP 505 HTTP Version Not Supported explained, and what it means when you see it in CI/CD and deployments.
HTTP 505 means the server does not support the HTTP protocol version in the request.
What it means
A 505 is rare; it points to a client using an HTTP version the server cannot handle, or a misconfigured proxy.
When you see it in CI/CD
In CI, a 505 usually means a misconfigured client or proxy forcing an unsupported protocol version. Check client TLS/HTTP settings.
Key takeaways
- 505 means an unsupported HTTP version.
- Rare and usually a misconfig.
- Check client/proxy protocol settings.