x-position
`x-position` appears on operations. Its value is an integer. Used by 11 providers across 36 OpenAPI documents. Observed values include `1`, `2`, `3`, `4`. Consistent with ordering & sorting — this is inferred from where the key appears and what it carries, not from any published definition.
Where it appears
| Location in the document | Occurrences | |
|---|---|---|
| operation | 5391 | |
| requestBody | 1048 | |
| parameter | 146 | |
| path | 7 |
What its value looks like
| Value shape | Occurrences |
|---|---|
| integer | 6592 |
Observed values
Sampled from the specifications, most frequent first.
Providers publishing it
All 11.
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.