Change Management

x-deprecatedMessage

`x-deprecatedMessage` appears on schema objects and properties. Its value is a string. Used by 5 providers across 18 OpenAPI documents. Observed values include `Use `storedPaymentMethodId` instead.`, `Use [Get all identity documents](https://mews-systems.gitbook.io/connector-api/o`, `Use `Counters` instead.`, `Use `authenticationData.authenticationOnly` instead.`. Consistent with change management — this is inferred from where the key appears and what it carries, not from any published definition.

Change Management 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.

491 occurrences

18 documents

5 providers

purpose-named

Where it appears

Location in the document	Occurrences
schema	462
operation	29

What its value looks like

Value shape	Occurrences
string	489
object	2

Observed values

Sampled from the specifications, most frequent first.

Use `storedPaymentMethodId` instead.Use [Get all identity documents](https://mews-systems.gitbook.io/connector-api/oUse `Counters` instead.Use `authenticationData.authenticationOnly` instead.Use `PersonCounts` instead.Use `AccountId` instead.Use `IsActive` instead.Use `Names` instead

Providers publishing it

All 5.

adyen lytx mews mews-com mews-systems

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 change management job.