x-generated-by
`x-generated-by` appears at the root of the document and in the info block. Its value is a string. Used by 197 providers across 207 OpenAPI documents. Observed values include `claude-crawl-2026-05-08`, `claude-genwave10-08-2026-05-23`, `api-evangelist-enrichment`, `API Evangelist enrichment pipeline`. Consistent with provenance — 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 | |
|---|---|---|
| info | 94 | |
| root | 113 |
What its value looks like
| Value shape | Occurrences |
|---|---|
| string | 207 |
Observed values
Sampled from the specifications, most frequent first.
Providers publishing it
Showing 50 of 197.
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.