Provenance
29 distinct extensions were invented to do this job. Each one is a provider deciding OpenAPI would not carry something and building their own way through. Where a job has many names and few uses each, nobody won — the problem was solved privately, over and over.
29 extensions
2342 occurrences
3 vendor-named
The extensions
| Extension | What it appears to do | Uses | Providers |
|---|---|---|---|
| x-generated-from | `x-generated-from` appears in the info block. Its value is a string. Used by 411 providers across 548 OpenAPI documents. Observed values include `documentation`, `https://storage.googleapis.com/gtidoc | 548 | 411 |
| x-provenance | `x-provenance` appears in the info block. Its value is a structured object. Used by 107 providers across 520 OpenAPI documents. Consistent with provenance — this is inferred from where the key appears | 520 | 107 |
| x-synonyms | `x-synonyms` appears on operations. Its value is a list. Used by a single provider across 1 OpenAPI document. Consistent with provenance — this is inferred from where the key appears and what it carri | 244 | 1 |
| 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` | 207 | 197 |
| x-originalParamName | `x-originalParamName` appears on request bodies. Its value is a string. Used by 5 providers across 5 OpenAPI documents. Observed values include `payload`, `body`, `update`, `value`. Consistent with pr | 203 | 5 |
| x-origin | `x-origin` appears in the info block. Its value is a list. Used by 125 providers across 166 OpenAPI documents. Observed values include `origin`. Consistent with provenance — this is inferred from wher | 168 | 125 |
| x-usedIn | `x-usedIn` appears on schema objects and properties. Its value is a list. Used by a single provider across 3 OpenAPI documents. Consistent with provenance — this is inferred from where the key appears | 164 | 1 |
| x-source-url | `x-source-url` appears in the info block and on schema objects and properties. Its value is a string. Used by 42 providers across 83 OpenAPI documents. Observed values include `https://developers.deli | 107 | 42 |
|
x-konfig-is-used-in-successful-response
vendor |
`x-konfig-is-used-in-successful-response` 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-konfig-` namespa | 51 | 1 |
| x-derived-from | `x-derived-from` appears in the info block. Its value is a string. Used by 38 providers across 41 OpenAPI documents. Observed values include `https://colossal.com/wp-json/`, `https://www.a2bio.com/wp- | 41 | 38 |
| x-source-pages | `x-source-pages` appears at the root of the document. Its value is a list. Used by a single provider across 17 OpenAPI documents. Consistent with provenance — this is inferred from where the key appea | 17 | 1 |
| x-apievangelist-provenance | `x-apievangelist-provenance` appears in the info block. Its value is a structured object. Used by 12 providers across 13 OpenAPI documents. Consistent with provenance — this is inferred from where the | 13 | 12 |
| x-harvest | `x-harvest` appears at the root of the document. Its value is a structured object. Used by 2 providers across 12 OpenAPI documents. Consistent with provenance — this is inferred from where the key app | 12 | 2 |
| x-api-evangelist-provenance | `x-api-evangelist-provenance` appears in the info block. Its value is a structured object. Used by 10 providers across 10 OpenAPI documents. Consistent with provenance — this is inferred from where th | 10 | 10 |
| x-apisjson-source | `x-apisjson-source` appears in the info block. Its value is a string. Used by 9 providers across 9 OpenAPI documents. Observed values include `https://partner.calm.com/docs/api`, `postman/homeward-off | 9 | 9 |
| x-apievangelist-derived-from | `x-apievangelist-derived-from` appears in the info block. Its value is a string. Used by 5 providers across 6 OpenAPI documents. Observed values include `https://afero-docs.readthedocs.io/en/latest/Cl | 6 | 5 |
|
x-konfig-is-used-in-non-successful-response
vendor |
`x-konfig-is-used-in-non-successful-response` 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-konfig-` nam | 6 | 1 |
| x-apis-io-provenance | `x-apis-io-provenance` appears in the info block. Its value is a structured object. Used by 3 providers across 3 OpenAPI documents. Consistent with provenance — this is inferred from where the key app | 3 | 3 |
| x-harvested | `x-harvested` appears in the info block. Its value is a string. Used by 2 providers across 2 OpenAPI documents. Observed values include `2026-08-06`, `2026-07-21`. Consistent with provenance — this is | 2 | 2 |
| x-source-urls | `x-source-urls` appears in the info block. Its value is a list. Used by 2 providers across 2 OpenAPI documents. Consistent with provenance — this is inferred from where the key appears and what it car | 2 | 2 |
| x-api-evangelist-derived-from | `x-api-evangelist-derived-from` appears in the info block. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `https://github.com/1deg/resource-server- | 1 | 1 |
| x-api-evangelist-harvest | `x-api-evangelist-harvest` appears in the info block. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with provenance — this is inferred from where th | 1 | 1 |
| x-apievangelist-harvested | `x-apievangelist-harvested` appears in the info block. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `2026-07-20`. Consistent with provenance — th | 1 | 1 |
| x-apis-json-derived-from | `x-apis-json-derived-from` appears in the info block. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `https://banking-docs.kanastra.com.br/ (public | 1 | 1 |
| x-apisjson-derived-from | `x-apisjson-derived-from` appears in the info block. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `postman/qgenda-collection.json`. Consistent wi | 1 | 1 |
| x-jentic-source-url | `x-jentic-source-url` appears in the info block. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `https://api.hypixel.net/`. Consistent with provena | 1 | 1 |
| x-modeled-from | `x-modeled-from` appears at the root of the document. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `documentation`. Consistent with provenance — | 1 | 1 |
|
x-ms-generated-by
vendor |
`x-ms-generated-by` appears in the info block. Its value is a structured object. Used by a single provider across 1 OpenAPI document. It sits in the `x-ms-` namespace, so its meaning is defined by ms | 1 | 1 |
| x-schema-provenance | `x-schema-provenance` appears on schema objects and properties. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `Partially verified. Live anonymous | 1 | 1 |
Work with this as data
Every extension here is available over the APIs.io API and to AI agents over MCP. OpenAPI Extensions is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for openapi extensions
3 MCP tools reach this
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
Call it yourself
curl for this page
Search the catalog
curl "https://apis.io/api/v1/search?q=provenance&limit=10"
Everything under a tag
curl "https://apis.io/api/v1/tags/provenance"Discovery needs no key. Ratings and market analysis are Pro.