Documentation & DX
179 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.
179 extensions
132434 occurrences
36 vendor-named
The extensions
| Extension | What it appears to do | Uses | Providers |
|---|---|---|---|
|
x-ms-docs-key-type
vendor |
`x-ms-docs-key-type` appears on parameter objects. Its value is a string. Used by a single provider across 70 OpenAPI documents. It sits in the `x-ms-` namespace, so its meaning is defined by ms tooli | 49979 | 1 |
|
x-ms-docs-operation-type
vendor |
`x-ms-docs-operation-type` appears on operations. Its value is a string. Used by a single provider across 71 OpenAPI documents. It sits in the `x-ms-` namespace, so its meaning is defined by ms toolin | 30347 | 1 |
|
x-ms-docs-grouped-path
vendor |
`x-ms-docs-grouped-path` appears on path items. Its value is a list. Used by a single provider across 39 OpenAPI documents. It sits in the `x-ms-` namespace, so its meaning is defined by ms tooling ra | 10106 | 1 |
| x-property-sort | `x-property-sort` appears on schema objects and properties. Its value is a list. Used by a single provider across 17 OpenAPI documents. Consistent with documentation & dx — this is inferred from where | 6437 | 1 |
|
x-ms-navigationProperty
vendor |
`x-ms-navigationProperty` appears on schema objects and properties. Its value is a boolean flag. Used by a single provider across 47 OpenAPI documents. It sits in the `x-ms-` namespace, so its meaning | 4879 | 1 |
| x-displayName | `x-displayName` appears on tags and in the document. Its value is a string. Used by 84 providers across 117 OpenAPI documents. Observed values include `Users`, `Authentication`, `Webhooks`, `Applicati | 2134 | 84 |
| x-summary | `x-summary` appears on response objects. Its value is a string. Used by 8 providers across 32 OpenAPI documents. Observed values include `Success`, `Unauthorized`, `Internal server error`, `Not found` | 1859 | 8 |
| x-tag | `x-tag` appears on schema objects and properties. Its value is a string. Used by 18 providers across 19 OpenAPI documents. Observed values include `articles`, `institutions`, `common`, `projects`. Con | 1576 | 18 |
| x-explicit-tags | `x-explicit-tags` appears on operations. Its value is a list. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the key appears and | 1567 | 1 |
| x-subcategory | `x-subcategory` appears on operations. Its value is a string. Used by 17 providers across 17 OpenAPI documents. Observed values include `Private Project Articles`, `Public Article`, `Private Article`, | 1271 | 17 |
|
x-apifox-orders
vendor |
`x-apifox-orders` appears on schema objects and properties and on response objects. Its value is a list. Used by 3 providers across 4 OpenAPI documents. It sits in the `x-apifox-` namespace, so its me | 1233 | 3 |
|
x-speakeasy-group
vendor |
`x-speakeasy-group` appears on operations. Its value is a string. Used by 10 providers across 13 OpenAPI documents. It sits in the `x-speakeasy-` namespace, so its meaning is defined by speakeasy tool | 1165 | 10 |
|
x-portone-title
vendor |
`x-portone-title` appears on schema objects and properties and on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. It sits in the `x-portone-` namespace, so its | 1124 | 1 |
| x-order | `x-order` appears on schema objects and properties and on operations. Its value is an integer. Used by 8 providers across 15 OpenAPI documents. Observed values include `1`, `2`, `0`, `3`. Consistent w | 1093 | 8 |
| x-badges | `x-badges` appears on operations. Its value is a list. Used by 16 providers across 19 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the key appears and what it ca | 940 | 16 |
|
x-ms-summary
vendor |
`x-ms-summary` appears on schema objects and properties. Its value is a string. Used by 2 providers across 7 OpenAPI documents. It sits in the `x-ms-` namespace, so its meaning is defined by ms toolin | 853 | 2 |
| x-tags | `x-tags` appears on schema objects and properties. Its value is a list. Used by 31 providers across 185 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the key appe | 844 | 31 |
|
x-box-tag
vendor |
`x-box-tag` appears on operations and on schema objects and properties. Its value is a string. Used by a single provider across 52 OpenAPI documents. It sits in the `x-box-` namespace, so its meaning | 842 | 1 |
| x-title | `x-title` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `Fields`, `Exclude Fields`, `List ID`, `Count`. Consistent with doc | 825 | 1 |
|
x-readme
vendor |
`x-readme` appears on operations. Its value is a structured object. Used by 52 providers across 128 OpenAPI documents. It sits in the `x-readme-` namespace, so its meaning is defined by readme tooling | 732 | 52 |
| x-logo | `x-logo` appears in the info block. Its value is a structured object. Used by 386 providers across 681 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the key appea | 684 | 386 |
| x-meta | `x-meta` appears on operations. Its value is a structured object. Used by 6 providers across 8 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the key appears and w | 674 | 6 |
| x-properties-order | `x-properties-order` appears on schema objects and properties. Its value is a list. Used by a single provider across 10 OpenAPI documents. Consistent with documentation & dx — this is inferred from wh | 674 | 1 |
| x-sortable | `x-sortable` appears on schema objects and properties. Its value is a boolean flag. Used by a single provider across 10 OpenAPI documents. Consistent with documentation & dx — this is inferred from wh | 614 | 1 |
| x-metaTags | `x-metaTags` appears on operations. Its value is a list. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the key appears and what | 612 | 1 |
| x-pretty-name | `x-pretty-name` appears on operations. Its value is a string. Used by a single provider across 23 OpenAPI documents. Observed values include `get`, `update`, `delete`, `create`. Consistent with docume | 529 | 1 |
| x-menu-order | `x-menu-order` appears on operations. Its value is an integer. Used by a single provider across 1 OpenAPI document. Observed values include `1`, `2`, `3`, `4`. Consistent with documentation & dx — thi | 523 | 1 |
|
x-ms-docs-toc-type
vendor |
`x-ms-docs-toc-type` appears on tags. Its value is a string. Used by a single provider across 1 OpenAPI document. It sits in the `x-ms-` namespace, so its meaning is defined by ms tooling rather than | 508 | 1 |
| x-ui-operation-id | `x-ui-operation-id` appears on operations. Its value is a string. Used by a single provider across 21 OpenAPI documents. Observed values include `/rest/organizations/paramId/commerce/v2/tracking-ids/p | 502 | 1 |
| x-throttling-group | `x-throttling-group` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `Medium`, `Light`, `Heavy`, `Auth`. Consistent with docu | 487 | 1 |
|
x-xgen-docs-url
vendor |
`x-xgen-docs-url` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. It sits in the `x-xgen-` namespace, so its meaning is defined by xgen tooling rathe | 468 | 1 |
|
x-okta-tags
vendor |
`x-okta-tags` appears on schema objects and properties. Its value is a list. Used by a single provider across 1 OpenAPI document. It sits in the `x-okta-` namespace, so its meaning is defined by okta | 462 | 1 |
| x-publishYaml | `x-publishYaml` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `userManagement`, `federatedApps`, `thirdPartyApps`, `OTP`. C | 459 | 1 |
| x-maxSortParameterCount | `x-maxSortParameterCount` appears on operations. Its value is an integer. Used by a single provider across 17 OpenAPI documents. Observed values include `10`, `1`, `2`, `4`. Consistent with documentat | 424 | 1 |
| x-operation-group | `x-operation-group` appears on operations. Its value is a list. Used by a single provider across 1 OpenAPI document. Observed values include `customDomains`, `clients`, `users`, `actions`. Consistent | 406 | 1 |
| x-sortIndex | `x-sortIndex` appears on operations. Its value is an integer. Used by a single provider across 24 OpenAPI documents. Observed values include `1`, `2`, `0`, `3`. Consistent with documentation & dx — th | 386 | 1 |
|
x-apidog-orders
vendor |
`x-apidog-orders` appears on schema objects and properties. Its value is a list. Used by 2 providers across 2 OpenAPI documents. It sits in the `x-apidog-` namespace, so its meaning is defined by apid | 322 | 2 |
| x-sort | `x-sort` appears on schema objects and properties and on parameter objects. Its value is an integer. Used by 2 providers across 3 OpenAPI documents. Observed values include `1`, `5`, `10`, `15`. Consi | 302 | 2 |
| x-tagGroups | `x-tagGroups` appears at the root of the document. Its value is a list. Used by 139 providers across 200 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the key app | 200 | 139 |
| x-ratelimit-category | `x-ratelimit-category` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `ads_read`, `ads_write`, `org_read`, `catalogs_read`. | 188 | 1 |
| x-tagGroup | `x-tagGroup` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `Contracts`, `Platform`, `Workflow`, `Legal Intake`. Consistent | 182 | 1 |
| x-annotation-dx-category | `x-annotation-dx-category` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `documents-document`, `documents-requisitions`, `a | 166 | 1 |
|
x-apisguru-categories
vendor |
`x-apisguru-categories` appears in the info block. Its value is a list. Used by 119 providers across 141 OpenAPI documents. It sits in the `x-apisguru-` namespace, so its meaning is defined by apisgur | 141 | 119 |
|
x-ds-category
vendor |
`x-ds-category` appears on schema objects and properties. Its value is a string. Used by a single provider across 6 OpenAPI documents. It sits in the `x-ds-` namespace, so its meaning is defined by ds | 130 | 1 |
| x-documentation | `x-documentation` appears on operations. Its value is a list. Used by 10 providers across 15 OpenAPI documents. Observed values include `https://github.com/DispatchMe/v3-api-docs`, `https://github.com | 127 | 10 |
|
x-portone-category
vendor |
`x-portone-category` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. It sits in the `x-portone-` namespace, so its meaning is defined by portone tool | 126 | 1 |
| x-doc-source | `x-doc-source` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `postman`, `drafted`, `inferred+docs:user-guide/ui/simulation- | 122 | 1 |
|
x-ds-order
vendor |
`x-ds-order` appears on schema objects and properties. Its value is a string. Used by a single provider across 6 OpenAPI documents. It sits in the `x-ds-` namespace, so its meaning is defined by ds to | 121 | 1 |
| x-group-parameters | `x-group-parameters` appears on operations. Its value is a boolean flag. Used by 6 providers across 12 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the key appea | 120 | 6 |
| x-doc-modified | `x-doc-modified` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `2026-06-29`, `2026-07-06`, `2026-07-09`, `2026-07-16`. Cons | 113 | 1 |
| x-api-group | `x-api-group` appears on operations. Its value is a string. Used by a single provider across 2 OpenAPI documents. Observed values include `manage`, `pay`, `Onboard`, `convert`. Consistent with documen | 111 | 1 |
| x-rdme-order | `x-rdme-order` appears on operations. Its value is an integer. Used by a single provider across 1 OpenAPI document. Observed values include `1`, `2`, `10`, `11`. Consistent with documentation & dx — t | 105 | 1 |
|
x-spotify-docs-type
vendor |
`x-spotify-docs-type` appears on schema objects and properties. Its value is a string. Used by a single provider across 1 OpenAPI document. It sits in the `x-spotify-` namespace, so its meaning is def | 94 | 1 |
| x-oaiTypeLabel | `x-oaiTypeLabel` appears on schema objects and properties. Its value is a string. Used by 3 providers across 5 OpenAPI documents. Observed values include `map`, `string`, `file`. Consistent with docum | 85 | 3 |
| x-tag-expanded | `x-tag-expanded` appears on tags. Its value is a boolean flag. Used by 4 providers across 5 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the key appears and what | 82 | 4 |
| x-publish | `x-publish` appears on operations. Its value is a boolean flag. Used by a single provider across 13 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the key appears | 79 | 1 |
| x-display-order | `x-display-order` appears on schema objects and properties. Its value is an integer. Used by a single provider across 6 OpenAPI documents. Observed values include `1`, `2`. Consistent with documentati | 76 | 1 |
| x-display-name | `x-display-name` appears in the document. Its value is a string. Used by 2 providers across 2 OpenAPI documents. Observed values include `Applicationtokens`, `Authentication`, `Automations`, `Cloudcon | 74 | 2 |
| x-default-sort-attribute | `x-default-sort-attribute` appears on schema objects and properties. Its value is a boolean flag. Used by a single provider across 10 OpenAPI documents. Consistent with documentation & dx — this is in | 70 | 1 |
| x-default-sort-direction | `x-default-sort-direction` appears on schema objects and properties. Its value is an integer. Used by a single provider across 10 OpenAPI documents. Observed values include `1`, `2`. Consistent with d | 70 | 1 |
| x-arrayOrderedMatching | `x-arrayOrderedMatching` appears on operations. Its value is a boolean flag. Used by 3 providers across 3 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the key ap | 68 | 3 |
|
x-box-enable-explorer
vendor |
`x-box-enable-explorer` appears on operations. Its value is a boolean flag. Used by a single provider across 13 OpenAPI documents. It sits in the `x-box-` namespace, so its meaning is defined by box t | 68 | 1 |
| x-api-naftiko-published | `x-api-naftiko-published` appears on operations. Its value is a string. Used by 2 providers across 14 OpenAPI documents. Observed values include `2025-07-25`, `2025-07-18`, `2025-07-20`. Consistent wi | 58 | 2 |
| x-rate-limit-category | `x-rate-limit-category` appears on operations. Its value is a string. Used by 2 providers across 2 OpenAPI documents. Observed values include `general`, `template_converter`, `autogenerator`, `query`. | 58 | 2 |
| x-source-doc | `x-source-doc` appears on operations and on request bodies. Its value is a string. Used by 3 providers across 8 OpenAPI documents. Observed values include `https://developer.gorelas.com/api-docs-md/re | 53 | 3 |
| x-solana-docs | `x-solana-docs` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `https://solana.com/docs/rpc/http/getaccountinfo`, `https://s | 52 | 1 |
| x-icon | `x-icon` appears in the document. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `exo-iam`, `exo-dns`, `exo-gpu`, `exo-dbaas`. Consistent with docu | 48 | 1 |
| x-alternate-documents | `x-alternate-documents` appears on operations. Its value is a list. Used by a single provider across 2 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the key appea | 47 | 1 |
| x-docs-type | `x-docs-type` appears on schema objects and properties. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `JSON`, `string`. Consistent with documentat | 41 | 1 |
| x-docs-force-simple-type | `x-docs-force-simple-type` appears on schema objects and properties and on header objects. Its value is a boolean flag. Used by a single provider across 1 OpenAPI document. Consistent with documentati | 37 | 1 |
| x-foundry-sort | `x-foundry-sort` appears on operations. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the key | 28 | 1 |
|
x-readme-fauxas
vendor |
`x-readme-fauxas` appears at the root of the document. Its value is a boolean flag. Used by 8 providers across 28 OpenAPI documents. It sits in the `x-readme-` namespace, so its meaning is defined by | 28 | 8 |
| x-tag-group | `x-tag-group` appears in the document. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `Professional Monitoring`, `Professional Planing`, `Professio | 28 | 1 |
| x-note | `x-note` appears on operations. Its value is a structured object. Used by 4 providers across 8 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the key appears and w | 22 | 4 |
| x-label | `x-label` appears on parameter objects. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `Transcript ID`, `Media file uploaded`, `Transcript created` | 21 | 1 |
| x-display-path | `x-display-path` appears on operations. Its value is a string. Used by a single provider across 5 OpenAPI documents. Observed values include `/chats/{CHAT_ID}/messages`, `/chats/{CHAT_ID}`, `/pin-cate | 19 | 1 |
| x-resource-group | `x-resource-group` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `HR`, `Organization`, `OAuth`, `Schedule`. Consistent with | 19 | 1 |
| x-documenter-version | `x-documenter-version` appears at the root of the document. Its value is a string. Used by a single provider across 17 OpenAPI documents. Observed values include `6.3.9`, `6.3.0`, `5.38.1`, `6.0.1`. C | 17 | 1 |
| x-lean-docs-discrepancy | `x-lean-docs-discrepancy` appears on schema objects and properties and on response objects. Its value is a string. Used by a single provider across 4 OpenAPI documents. Observed values include `missin | 16 | 1 |
| x-provider-published | `x-provider-published` appears in the info block. Its value is a boolean flag. Used by 14 providers across 15 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the ke | 15 | 14 |
| x-notes | `x-notes` appears on operations. Its value is a string. Used by a single provider across 3 OpenAPI documents. Observed values include `Create a Customer object.`, `Retrieve a Customer`, `Update a Cust | 14 | 1 |
| x-orderingPosition | `x-orderingPosition` appears on operations. Its value is a string. Used by a single provider across 2 OpenAPI documents. Observed values include `1`, `2`, `3`, `04`. Consistent with documentation & dx | 13 | 1 |
|
x-ms-meta
vendor |
`x-ms-meta` appears on header objects. Its value is a structured object. Used by a single provider across 3 OpenAPI documents. It sits in the `x-ms-` namespace, so its meaning is defined by ms tooling | 12 | 1 |
|
x-mux-doc-decorators
vendor |
`x-mux-doc-decorators` appears on schema objects and properties. Its value is a list. Used by a single provider across 1 OpenAPI document. It sits in the `x-mux-` namespace, so its meaning is defined | 11 | 1 |
| x-page-icon | `x-page-icon` appears in the document. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `layer-group`, `map-location`, `shapes`, `user`. Consistent w | 11 | 1 |
| x-group | `x-group` appears in the document and on tags. Its value is a string. Used by 3 providers across 3 OpenAPI documents. Observed values include `Knowledge Hub`, `Authentication`, `Entity Resolution`, `D | 10 | 3 |
|
x-box-reference-category
vendor |
`x-box-reference-category` appears on operations and on schema objects and properties. Its value is a string. Used by a single provider across 2 OpenAPI documents. It sits in the `x-box-` namespace, s | 9 | 1 |
| x-disableTryItOut | `x-disableTryItOut` appears on operations. Its value is a boolean flag. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the key ap | 8 | 1 |
| x--orders | `x--orders` appears on schema objects and properties and on response objects. Its value is a list. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inf | 7 | 1 |
| x-api-category | `x-api-category` appears in the info block. Its value is a string. Used by a single provider across 7 OpenAPI documents. Observed values include `TARDIS`, `Infrastructure`. Consistent with documentati | 7 | 1 |
| x-apievangelist-note | `x-apievangelist-note` appears in the info block. Its value is a structured object. Used by 7 providers across 7 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the | 7 | 7 |
| x-enum-order-preserved | `x-enum-order-preserved` appears on schema objects and properties. Its value is a boolean flag. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferr | 7 | 1 |
| x-tag-groups | `x-tag-groups` appears in the document. Its value is a structured object. Used by a single provider across 7 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the key | 7 | 1 |
| x-category | `x-category` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `domain`. Consistent with documentation & dx — this is inferred | 6 | 1 |
|
x-ds-categories
vendor |
`x-ds-categories` appears at the root of the document. Its value is a list. Used by a single provider across 6 OpenAPI documents. It sits in the `x-ds-` namespace, so its meaning is defined by ds tool | 6 | 1 |
| x-publisher | `x-publisher` appears in the info block. Its value is a string. Used by a single provider across 6 OpenAPI documents. Observed values include `Losant IoT, Inc.`. Consistent with documentation & dx — t | 6 | 1 |
| x-modeled-note | `x-modeled-note` appears in the info block. Its value is a structured object. Used by 5 providers across 5 OpenAPI documents. Consistent with documentation & dx — this is inferred from where the key a | 5 | 5 |
| x-sort-order | `x-sort-order` appears on operations. Its value is an integer. Used by a single provider across 1 OpenAPI document. Observed values include `0`. Consistent with documentation & dx — this is inferred f | 5 | 1 |
|
x-amz-meta-
vendor |
`x-amz-meta-` appears on schema objects and properties. Its value is a structured object. Used by a single provider across 1 OpenAPI document. It sits in the `x-amz-` namespace, so its meaning is defi | 4 | 1 |
| x-api-evangelist-note | `x-api-evangelist-note` appears in the info block. Its value is a string. Used by 4 providers across 4 OpenAPI documents. Observed values include `Derived by the API Evangelist enrichment pipeline fro | 4 | 4 |
| x-gitbook-description-document | `x-gitbook-description-document` appears in the info block and on operations. Its value is a structured object. Used by 2 providers across 2 OpenAPI documents. Consistent with documentation & dx — thi | 4 | 2 |
| x-not-a-provider-published-spec | `x-not-a-provider-published-spec` appears in the info block. Its value is a boolean flag. Used by 3 providers across 4 OpenAPI documents. Consistent with documentation & dx — this is inferred from whe | 4 | 3 |
|
x-amz-meta-cid
vendor |
`x-amz-meta-cid` appears on header objects. Its value is a structured object. Used by a single provider across 1 OpenAPI document. It sits in the `x-amz-` namespace, so its meaning is defined by amz t | 3 | 1 |
| x-apievangelist-provider-published | `x-apievangelist-provider-published` appears in the info block. Its value is a boolean flag. Used by 2 providers across 3 OpenAPI documents. Consistent with documentation & dx — this is inferred from | 3 | 2 |
| x-docs-model-object | `x-docs-model-object` appears on schema objects and properties. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is infe | 3 | 1 |
| x-explorer-enabled | `x-explorer-enabled` appears on operations and at the root of the document. Its value is a boolean flag. Used by 3 providers across 3 OpenAPI documents. Consistent with documentation & dx — this is in | 3 | 3 |
|
x-ms-tag-count
vendor |
`x-ms-tag-count` appears on header objects. 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 too | 3 | 1 |
| x-schemas-summarized | `x-schemas-summarized` appears in the info block. Its value is a boolean flag. Used by a single provider across 3 OpenAPI documents. Consistent with documentation & dx — this is inferred from where th | 3 | 1 |
|
x-amz-meta-validation_profile
vendor |
`x-amz-meta-validation_profile` appears on schema objects and properties and on response objects. Its value is a string. Used by a single provider across 1 OpenAPI document. It sits in the `x-amz-` na | 2 | 1 |
| x-derivation-note | `x-derivation-note` appears in the info block. Its value is a structured object. Used by a single provider across 2 OpenAPI documents. Consistent with documentation & dx — this is inferred from where | 2 | 1 |
| x-docs | `x-docs` appears in the info block. Its value is a string. Used by 2 providers across 2 OpenAPI documents. Observed values include `https://tunein.com/broadcasters/api/`, `https://userlens.gitbook.io/ | 2 | 2 |
| x-exclude-tags-from-libraries | `x-exclude-tags-from-libraries` appears at the root of the document. Its value is a list. Used by 2 providers across 2 OpenAPI documents. Consistent with documentation & dx — this is inferred from whe | 2 | 2 |
| x-groq-meta | `x-groq-meta` appears on schema objects and properties. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred fro | 2 | 1 |
| x-operator-note | `x-operator-note` appears at the root of the document. Its value is a structured object. Used by a single provider across 2 OpenAPI documents. Consistent with documentation & dx — this is inferred fro | 2 | 1 |
| x-parent-tag | `x-parent-tag` appears on tags. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `Prospecting`. Consistent with documentation & dx — this is inferred | 2 | 1 |
| x-pingone-docs-8830 | `x-pingone-docs-8830` appears on response objects. Its value is a boolean flag. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where th | 2 | 1 |
| x-source-docs | `x-source-docs` appears in the info block. Its value is a string. Used by 2 providers across 2 OpenAPI documents. Observed values include `https://api.certik-skynet.com/public-docs/`, `https://docs.mo | 2 | 2 |
| x-source-document | `x-source-document` appears in the info block. Its value is a string. Used by 2 providers across 2 OpenAPI documents. Observed values include `https://cloudsight.docs.apiary.io/api-description-documen | 2 | 2 |
| x-tagDescriptions | `x-tagDescriptions` appears at the root of the document. Its value is a structured object. Used by a single provider across 2 OpenAPI documents. Consistent with documentation & dx — this is inferred f | 2 | 1 |
| x-DisplayName | `x-DisplayName` appears on security schemes. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `Network-Token`. Consistent with documentation & dx — t | 1 | 1 |
|
x-ads-meta-Content-Disposition
vendor |
`x-ads-meta-Content-Disposition` appears on schema objects and properties. Its value is a structured object. Used by a single provider across 1 OpenAPI document. It sits in the `x-ads-` namespace, so | 1 | 1 |
|
x-ads-meta-Content-Encoding
vendor |
`x-ads-meta-Content-Encoding` appears on schema objects and properties. Its value is a structured object. Used by a single provider across 1 OpenAPI document. It sits in the `x-ads-` namespace, so its | 1 | 1 |
|
x-ads-meta-Content-Type
vendor |
`x-ads-meta-Content-Type` appears on schema objects and properties. Its value is a structured object. Used by a single provider across 1 OpenAPI document. It sits in the `x-ads-` namespace, so its mea | 1 | 1 |
| x-api-explorer | `x-api-explorer` appears in the info block. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the | 1 | 1 |
| x-api-version-note | `x-api-version-note` appears in the info block. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where | 1 | 1 |
| x-artifact-tag | `x-artifact-tag` appears on header objects. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the | 1 | 1 |
| x-ballerina-display | `x-ballerina-display` appears in the info block. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where | 1 | 1 |
| x-categories | `x-categories` appears in components. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the key ap | 1 | 1 |
| x-categories-order | `x-categories-order` appears in components. Its value is a list. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the key appears a | 1 | 1 |
| x-doc | `x-doc` appears on parameter objects. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the key ap | 1 | 1 |
| x-doc-structure | `x-doc-structure` appears at the root of the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from | 1 | 1 |
| x-docs-schema-whitelist | `x-docs-schema-whitelist` appears in the info block. Its value is a list. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the key | 1 | 1 |
| x-document | `x-document` appears on parameter objects. Its value is a boolean flag. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the key ap | 1 | 1 |
| x-documentation-url | `x-documentation-url` appears in the info block. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `https://docs.fireflies.ai/getting-started/introduc | 1 | 1 |
| x-documented-sales-upload-fields | `x-documented-sales-upload-fields` appears in the info block. Its value is a list. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where | 1 | 1 |
| x-extensions-note | `x-extensions-note` appears in the info block. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where t | 1 | 1 |
| x-favicon | `x-favicon` appears in the info block. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `https://cdn.spotdraft.com/assets/favicon.png`. Consistent wi | 1 | 1 |
|
x-goog-meta-user
vendor |
`x-goog-meta-user` appears on schema objects and properties. Its value is a structured object. Used by a single provider across 1 OpenAPI document. It sits in the `x-goog-` namespace, so its meaning i | 1 | 1 |
| x-image-uri | `x-image-uri` appears in the info block. Its value is a string. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the key appears an | 1 | 1 |
| x-inferred-note | `x-inferred-note` appears on operations. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the key | 1 | 1 |
| x-iot-domain-group-properties | `x-iot-domain-group-properties` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred fr | 1 | 1 |
| x-jackson-property-order | `x-jackson-property-order` appears on schema objects and properties. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is | 1 | 1 |
| x-json-tag | `x-json-tag` appears on schema objects and properties. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `json:"content`. Consistent with documentatio | 1 | 1 |
| x-lunar-consumer-tag | `x-lunar-consumer-tag` appears on header objects. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from wher | 1 | 1 |
|
x-ms-group
vendor |
`x-ms-group` appears on header objects. 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 tooling | 1 | 1 |
|
x-ms-isordered
vendor |
`x-ms-isordered` appears on schema objects and properties. 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 de | 1 | 1 |
| x-notebookSessionAudit | `x-notebookSessionAudit` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from wher | 1 | 1 |
| x-notebookSessionBlockCoreQuota | `x-notebookSessionBlockCoreQuota` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred | 1 | 1 |
| x-notebookSessionCoreQuota | `x-notebookSessionCoreQuota` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from | 1 | 1 |
| x-notebookSessionCoreQuotaAndUpdateCondition | `x-notebookSessionCoreQuotaAndUpdateCondition` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this | 1 | 1 |
| x-notebookSessionCoreQuotaUsageAndUpdateCondition | `x-notebookSessionCoreQuotaUsageAndUpdateCondition` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — | 1 | 1 |
| x-notebookSessionExistingTags | `x-notebookSessionExistingTags` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred fr | 1 | 1 |
| x-notebookSessionFlexCoreQuota | `x-notebookSessionFlexCoreQuota` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred f | 1 | 1 |
| x-notebookSessionFlexCoreQuotaAndUpdateCondition | `x-notebookSessionFlexCoreQuotaAndUpdateCondition` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — | 1 | 1 |
| x-notebookSessionFlexCoreQuotaUsageAndUpdateConditon | `x-notebookSessionFlexCoreQuotaUsageAndUpdateConditon` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & d | 1 | 1 |
| x-notebookSessionFlexMemoryQuota | `x-notebookSessionFlexMemoryQuota` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred | 1 | 1 |
| x-notebookSessionFlexMemoryQuotaAndUpdateCondition | `x-notebookSessionFlexMemoryQuotaAndUpdateCondition` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx | 1 | 1 |
| x-notebookSessionFlexMemoryQuotaUsageAndUpdateCondition | `x-notebookSessionFlexMemoryQuotaUsageAndUpdateCondition` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation | 1 | 1 |
| x-notebookSessionGpuCoreQuota | `x-notebookSessionGpuCoreQuota` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred fr | 1 | 1 |
| x-notebookSessionGpuCoreQuotaAndUpdateCondition | `x-notebookSessionGpuCoreQuotaAndUpdateCondition` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — t | 1 | 1 |
| x-notebookSessionGpuCoreQuotaUsageAndUpdateCondition | `x-notebookSessionGpuCoreQuotaUsageAndUpdateCondition` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & d | 1 | 1 |
| x-notebookSessionResource | `x-notebookSessionResource` appears in the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from w | 1 | 1 |
| x-oas-source-link | `x-oas-source-link` 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/Kong/platform-api/commit/`. Consi | 1 | 1 |
| x-oneOf-labels | `x-oneOf-labels` appears on schema objects and properties. Its value is a list. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where th | 1 | 1 |
| x-ors-docs | `x-ors-docs` appears in the info block. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `https://giscience.github.io/openrouteservice/`. Consistent | 1 | 1 |
|
x-portone-categories
vendor |
`x-portone-categories` appears at the root of the document. Its value is a list. Used by a single provider across 1 OpenAPI document. It sits in the `x-portone-` namespace, so its meaning is defined b | 1 | 1 |
| x-publishable-key | `x-publishable-key` appears on parameter objects. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from wher | 1 | 1 |
| x-rebrand-note | `x-rebrand-note` appears in the info block. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the | 1 | 1 |
| x-sortOrder | `x-sortOrder` appears on operations. Its value is an integer. Used by a single provider across 1 OpenAPI document. Observed values include `0`. Consistent with documentation & dx — this is inferred fr | 1 | 1 |
| x-source-documentation | `x-source-documentation` appears in the info block. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `https://docs-leaseaccelerator.insightsoftware.c | 1 | 1 |
| x-source-note | `x-source-note` appears in the info block. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the k | 1 | 1 |
| x-source-notes | `x-source-notes` appears in the info block. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the | 1 | 1 |
| x-status-notes | `x-status-notes` appears in the info block. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the | 1 | 1 |
| x-transport-note | `x-transport-note` appears in the info block. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where th | 1 | 1 |
| x-transport-notes | `x-transport-notes` appears in the info block. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where t | 1 | 1 |
| x-unofficial-docs | `x-unofficial-docs` appears in the info block. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `https://tunein-api.corehacked.com/`. Consistent with | 1 | 1 |
| x-vc-meta-more | `x-vc-meta-more` appears on header objects. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with documentation & dx — this is inferred from where the | 1 | 1 |
| x-website | `x-website` appears in the info block. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `https://conceptnet.io`. Consistent with documentation & dx — | 1 | 1 |
| x-x-summary | `x-x-summary` appears on response objects. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `Request failed`. Consistent with documentation & dx — th | 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=documentation-dx&limit=10"
Everything under a tag
curl "https://apis.io/api/v1/tags/documentation-dx"Discovery needs no key. Ratings and market analysis are Pro.