x-min-v

Versioning & Lifecycle de facto — unregistered request reached by regulation

A reference entry. The registry facts and catalog measurements below are complete; the written guidance for this header has not been authored yet.

x-min-v is versioning & lifecycle — Headers that carry version, deprecation and end-of-life. The category the catalog shows to be almost entirely unused, which is a finding rather than a gap in the data.

The registry

Not registered with IANA. It is a de facto or vendor field — real, widely used, and governed by nothing but convention.

In the catalog

Declared by 61 providers across 2,262 published specification files in the API Evangelist catalog, where it appears as a request header — sent by the client.

Reached by regulation

This header is mandated: the law, or a technical standard the law makes binding, names it directly. Only a credentialed caller can watch it in flight. The catalog can see that a contract declares it; it cannot see that a deployment honours it, and this site never claims otherwise.