HTTP 308 Permanent Redirect

In short: Permanent redirect in which method and body stay unchanged.

In more detail: The counterpart of 301 that preserves the method: a POST stays a POST. Search engines adopt the new address and browsers may remember the redirect permanently.

In Depth

When it occurs

• An API endpoint has moved and clients should keep sending POST.
• Domain move where all methods should be preserved.

What you can do

1. As a user there is nothing to do.
2. Operators: redirect old addresses consistently to the new ones and adjust internal links.

See also: HTTP 301 Moved Permanently, HTTP 307 Temporary Redirect, HTTP Status Codes Overview