203

Non-Authoritative Information

The request is successfully served, but the payload has been modified by a transformation proxy for advantageous reasons in a form, different from, what would be a normal '200 OK' response's payload.

Use Case

A client requests for an image resource and let's say under normal circumstances the image sent would be in the png but the transforming proxy converts it into a webp file and the server sends it over with a 203 response.