Performance & quality
21 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.
21 extensions
10732 occurrences
5 vendor-named
The extensions
| Extension | What it appears to do | Uses | Providers |
|---|---|---|---|
| x-validate | `x-validate` appears on schema objects and properties. Its value is a string. Used by a single provider across 12 OpenAPI documents. Observed values include `null`. Consistent with performance & quali | 3505 | 1 |
| x-logErrorCode | `x-logErrorCode` appears on response objects. Its value is an integer. Used by 2 providers across 21 OpenAPI documents. Observed values include `401`, `500`, `404`, `429`. Consistent with performance | 2018 | 2 |
| x-errorCodes | `x-errorCodes` appears on response objects. Its value is a list. Used by a single provider across 3 OpenAPI documents. Consistent with performance & quality — this is inferred from where the key appea | 1860 | 1 |
|
x-ms-error-code
vendor |
`x-ms-error-code` appears on header objects. Its value is a structured object. Used by a single provider across 60 OpenAPI documents. It sits in the `x-ms-` namespace, so its meaning is defined by ms | 1136 | 1 |
| x-latency-category | `x-latency-category` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `responsive`, `interactive`, `background`. Consistent wi | 1038 | 1 |
| x-cfPlanAvailability | `x-cfPlanAvailability` appears on operations. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with performance & quality — this is inferred from where | 480 | 1 |
| x-availability | `x-availability` appears on operations. Its value is a string. Used by a single provider across 1 OpenAPI document. Observed values include `High`, `Limited`. Consistent with performance & quality — t | 310 | 1 |
|
x-fern-availability
vendor |
`x-fern-availability` appears on operations. Its value is a string. Used by a single provider across 7 OpenAPI documents. It sits in the `x-fern-` namespace, so its meaning is defined by fern tooling | 186 | 1 |
| x-unstable | `x-unstable` appears on operations. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with performance & quality — this is inferred from where the key a | 92 | 1 |
| x-monitor | `x-monitor` appears on operations. Its value is a boolean flag. Used by a single provider across 1 OpenAPI document. Consistent with performance & quality — this is inferred from where the key appears | 49 | 1 |
|
x-portone-unstable
vendor |
`x-portone-unstable` appears on operations. Its value is a boolean flag. Used by a single provider across 1 OpenAPI document. It sits in the `x-portone-` namespace, so its meaning is defined by porton | 27 | 1 |
| x-idempotency-key | `x-idempotency-key` appears on parameter objects. Its value is a structured object. Used by 3 providers across 10 OpenAPI documents. Consistent with performance & quality — this is inferred from where | 10 | 3 |
| x-400 | `x-400` appears on response objects. Its value is a string. Used by 3 providers across 3 OpenAPI documents. Observed values include `Reference No Not found:`, `Transaction already canceled:`, `From Da | 9 | 3 |
| x-korbit-error-codes | `x-korbit-error-codes` appears on operations. Its value is a list. Used by a single provider across 1 OpenAPI document. Consistent with performance & quality — this is inferred from where the key appe | 4 | 1 |
| x-ably-errorcode | `x-ably-errorcode` appears on header objects. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with performance & quality — this is inferred from where | 2 | 1 |
| x-403 | `x-403` appears on operations. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with performance & quality — this is inferred from where the key appear | 1 | 1 |
| x-api-availability | `x-api-availability` appears in the info block. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with performance & quality — this is inferred from whe | 1 | 1 |
| x-error-codes | `x-error-codes` appears at the root of the document. Its value is a structured object. Used by a single provider across 1 OpenAPI document. Consistent with performance & quality — this is inferred fro | 1 | 1 |
| x-idempotent | `x-idempotent` appears on operations. Its value is a boolean flag. Used by a single provider across 1 OpenAPI document. Consistent with performance & quality — this is inferred from where the key appe | 1 | 1 |
|
x-ms-response-latency-in-milliseconds
vendor |
`x-ms-response-latency-in-milliseconds` 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 meani | 1 | 1 |
|
x-square-generic-error-codes
vendor |
`x-square-generic-error-codes` appears in the info block. Its value is a list. Used by a single provider across 1 OpenAPI document. It sits in the `x-square-` namespace, so its meaning is defined by s | 1 | 1 |