Provenance

x-harvested

`x-harvested` appears in the info block and at the root of the document. Its value is a string. Used by 9 providers across 52 OpenAPI documents. Observed values include `2026-09-04`, `2026-09-05`, `2026-09-18`, `2026-08-13`. Consistent with provenance — this is inferred from where the key appears and what it carries, not from any published definition.

Provenance 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.
52 occurrences
52 documents
9 providers
purpose-named

Where it appears

Location in the documentOccurrences
info 26
root 26

What its value looks like

Value shapeOccurrences
string50
object2

Observed values

Sampled from the specifications, most frequent first.

2026-09-042026-09-052026-09-182026-08-132026-07-21

Providers publishing it

All 9.

avnetbarclayscitizens-financial-grouphydro-ottawamanychattiktok-adstoronto-hydroxiaomanxrhealth

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 provenance job.