Specifications, registries, and schemas https://spec.openapis.org/ JSON Schema alternative-schema Thu, 19 Feb 2026 17:28:48 +0000 /registry/alternative-schema/jsonSchema /registry/alternative-schema/jsonSchema xml Schema alternative-schema Thu, 19 Feb 2026 17:28:48 +0000 /registry/alternative-schema/xmlSchema /registry/alternative-schema/xmlSchema x-oas-draft-alternativeSchema draft-feature Thu, 19 Feb 2026 17:28:48 +0000 /registry/draft-feature/alternativeSchema /registry/draft-feature/alternativeSchema Used to hold a reference to the API provider's Twitter account. extension Thu, 19 Feb 2026 17:28:48 +0000 /registry/extension/x-twitter /registry/extension/x-twitter Binary data encoded as a url-safe string as defined in [RFC4648](https://www.rfc-editor.org/rfc/rfc4648#section-5) format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/base64url /registry/format/base64url any sequence of octets format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/binary /registry/format/binary base64 encoded data as defined in [RFC4648](https://www.rfc-editor.org/rfc/rfc4648#section-4) format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/byte /registry/format/byte A single character format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/char /registry/format/char commonmark-formatted text format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/commonmark /registry/format/commonmark RFC3339 date-time without the timezone component format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/date-time-local /registry/format/date-time-local date and time as defined by date-time - [RFC3339](https://www.rfc-editor.org/rfc/rfc3339#section-5.6) format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/date-time /registry/format/date-time date as defined by full-date - [RFC3339](https://www.rfc-editor.org/rfc/rfc3339#section-5.6) format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/date /registry/format/date A fixed point decimal number of unspecified precision and range format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/decimal /registry/format/decimal A decimal floating-point number with 34 significant decimal digits format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/decimal128 /registry/format/decimal128 an integer that can be stored in an IEEE 754 double-precision number without loss of precision format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/double-int /registry/format/double-int double precision floating point number format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/double /registry/format/double duration as defined by duration - RFC3339 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/duration /registry/format/duration An email address as defined as Mailbox in RFC5321 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/email /registry/format/email single precision floating point number format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/float /registry/format/float A host name as defined by RFC1123 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/hostname /registry/format/hostname HTML-formatted text format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/html /registry/format/html date and time as defined by HTTP-date - [RFC7231](https://datatracker.ietf.org/doc/html/rfc7231#section-7.1.1.1) format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/http-date /registry/format/http-date An email address as defined as Mailbox in RFC6531 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/idn-email /registry/format/idn-email An internationalized host name as defined by RFC5890 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/idn-hostname /registry/format/idn-hostname signed 16-bit integer format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/int16 /registry/format/int16 signed 32-bit integer format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/int32 /registry/format/int32 signed 64-bit integer format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/int64 /registry/format/int64 signed 8-bit integer format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/int8 /registry/format/int8 An IPv4 address as defined as dotted-quad by RFC2673 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/ipv4 /registry/format/ipv4 An IPv6 address as defined by RFC4673 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/ipv6 /registry/format/ipv6 A Internationalized Resource Identifier as defined in RFC3987 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/iri-reference /registry/format/iri-reference A Internationalized Resource Identifier as defined in RFC3987 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/iri /registry/format/iri A JSON string representation of a JSON Pointer as defined in RFC6901 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/json-pointer /registry/format/json-pointer A media type as defined by the `media-range` ABNF production in RFC9110. format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/media-range /registry/format/media-range a string that hints to obscure the value. format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/password /registry/format/password A regular expression as defined in ECMA-262 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/regex /registry/format/regex A JSON string representation of a relative JSON Pointer as defined in draft RFC 01 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/relative-json-pointer /registry/format/relative-json-pointer structured fields byte sequence as defined in [RFC8941] format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/sf-binary /registry/format/sf-binary structured fields boolean as defined in [RFC8941] format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/sf-boolean /registry/format/sf-boolean structured fields decimal as defined in [RFC8941] format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/sf-decimal /registry/format/sf-decimal structured fields integer as defined in [RFC8941] format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/sf-integer /registry/format/sf-integer structured fields string as defined in [RFC8941] format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/sf-string /registry/format/sf-string structured fields token as defined in [RFC8941] format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/sf-token /registry/format/sf-token RFC3339 time without the timezone component format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/time-local /registry/format/time-local time as defined by full-time - RFC3339 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/time /registry/format/time unsigned 16-bit integer format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/uint16 /registry/format/uint16 unsigned 32-bit integer format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/uint32 /registry/format/uint32 unsigned 64-bit integer format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/uint64 /registry/format/uint64 unsigned 8-bit integer format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/uint8 /registry/format/uint8 seconds since Jan 1st 1970 - [IEEE1003.1-2024/POSIX.1-2024](https://pubs.opengroup.org/onlinepubs/9799919799/) format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/unixtime /registry/format/unixtime A URI reference as defined in [RFC3986](https://www.rfc-editor.org/info/rfc3986) format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/uri-reference /registry/format/uri-reference A URI Template as defined in RFC6570 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/uri-template /registry/format/uri-template A Uniform Resource Identifier as defined in RFC3986 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/uri /registry/format/uri A Universally Unique IDentifier as defined in RFC4122 format Thu, 19 Feb 2026 17:28:48 +0000 /registry/format/uuid /registry/format/uuid Non-text-based media types media-type Thu, 19 Feb 2026 17:28:48 +0000 /registry/media-type/binary /registry/media-type/binary Ordered name-value pairs media-type Thu, 19 Feb 2026 17:28:48 +0000 /registry/media-type/forms /registry/media-type/forms Sets of RFC8288 Web Links media-type Thu, 19 Feb 2026 17:28:48 +0000 /registry/media-type/linksets /registry/media-type/linksets Multiple concatenated JSON documents suitable for streaming media-type Thu, 19 Feb 2026 17:28:48 +0000 /registry/media-type/sequential_json /registry/media-type/sequential_json Multipart subtypes with unnamed parts media-type Thu, 19 Feb 2026 17:28:48 +0000 /registry/media-type/sequential_multipart /registry/media-type/sequential_multipart Event streams for SSE media-type Thu, 19 Feb 2026 17:28:48 +0000 /registry/media-type/sse /registry/media-type/sse Text-based media types media-type Thu, 19 Feb 2026 17:28:48 +0000 /registry/media-type/text /registry/media-type/text Compact encoding of the JSON data model for LLM prompts media-type Thu, 19 Feb 2026 17:28:48 +0000 /registry/media-type/toon /registry/media-type/toon Extensible markup language media-type Thu, 19 Feb 2026 17:28:48 +0000 /registry/media-type/xml /registry/media-type/xml Extensions created and used by [Financial Data Exchange (FDX)](https://financialdataexchange.org) namespace Thu, 19 Feb 2026 17:28:48 +0000 /registry/namespace/fdx /registry/namespace/fdx Extensions [created and used by Microsoft](https://github.com/microsoft/OpenAPI/blob/main/extensions/index.md) namespace Thu, 19 Feb 2026 17:28:48 +0000 /registry/namespace/ms /registry/namespace/ms Reserved for uses defined by the OAI namespace Thu, 19 Feb 2026 17:28:48 +0000 /registry/namespace/oai /registry/namespace/oai Extensions created by OAI to indicate proposed changes to the OAS specification namespace Thu, 19 Feb 2026 17:28:48 +0000 /registry/namespace/oas-draft /registry/namespace/oas-draft Reserved for uses defined by the OAI namespace Thu, 19 Feb 2026 17:28:48 +0000 /registry/namespace/oas /registry/namespace/oas Extensions created and used by SAP namespace Thu, 19 Feb 2026 17:28:48 +0000 /registry/namespace/sap /registry/namespace/sap Extensions created and used by Scalar namespace Thu, 19 Feb 2026 17:28:48 +0000 /registry/namespace/scalar /registry/namespace/scalar Tags with `kind: audience` indicate the intended audience for an operation. tag-kind Thu, 19 Feb 2026 17:28:48 +0000 /registry/tag-kind/audience /registry/tag-kind/audience Tags with `kind: badge` are applied as visible badges in documentation. tag-kind Thu, 19 Feb 2026 17:28:48 +0000 /registry/tag-kind/badge /registry/tag-kind/badge Tags with `kind: nav` are used in documentation to group operations into sections tag-kind Thu, 19 Feb 2026 17:28:48 +0000 /registry/tag-kind/nav /registry/tag-kind/nav