Data & schema semantics · Validation & constraints

x-mux-no-required-properties

`x-mux-no-required-properties` appears on schema objects and properties. Its value is a boolean flag. Used by a single provider across 1 OpenAPI document. It sits in the `x-mux-` namespace, so its meaning is defined by mux tooling rather than by OpenAPI. Consistent with validation & constraints — this is inferred from where the key appears and what it carries, not from any published definition.

Data & schema semantics x-mux- namespace derived description

How this description was produced. It is assembled from what was measured in the corpus — where this key appears in a document, what shape its value takes, the values observed, and how many providers use it. It is not taken from a published definition, because for most extensions none exists. Read it as evidence, not as a specification. If you own this extension and want it described properly, tell us.

1 occurrences

1 documents

1 providers

vendor-named

Where it appears

Location in the document	Occurrences
schema	1

What its value looks like

Value shape	Occurrences
boolean	1

Observed values

Sampled from the specifications, most frequent first.

true

Providers publishing it

All 1.

mux-com

Why this is not in OpenAPI

Extensions exist because a provider needed something the specification would not carry. Most of what they hold is not the API contract at all — it is operational metadata about the contract: documentation, lifecycle, policy, provenance, and now agents. That metadata is usually better placed alongside the contract, in an Overlay or an APIs.json index, than crammed inside it. See everything else doing the data & schema semantics job.