OpenAPI Specification

The OpenAPI Specification (OAS), previously known as the Swagger Specification, is a specification for a programming language-agnostic, machine-readable interface definition language for describing, producing, consuming, and visualizing web services. OpenAPI documents describe API services and are represented in YAML or JSON formats.

GitHub: https://github.com/topics/openapi
Wikipedia: https://en.wikipedia.org/wiki/OpenAPI_Specification
Repo: https://github.com/OAI/OpenAPI-Specification
Created by: OpenAPI Initiative, Tony Tam, Darrel Miller, Mike Ralphson, Ron Ratovsky, Uri Sarid, Jason Harmon
Released: August 10, 2011
Related Topics: json-schema, raml, rest-api,
Aliases: open-api, swagger-spec, swagger-specification, openapi-spec, openapi-specification, open-api-specification, oas, openapi-description,
Last updated: 2026-07-08 00:22:40 UTC
JSON Representation

https://github.com/ubill-ge/sdk-ts

TS/JS SDK for working with the UBill API

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https://github.com/soldarlabs/oapi-litegraph-nodegen

Generate dynamic and callable Litegraph nodes from OpenAPI specifications, enabling seamless API integration in a visual programming environment.

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https://github.com/90dy/ts-openapis

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https://github.com/vicradon/petstore

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https://github.com/lepetitbloc/swagger-editor

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https://github.com/simplicitesoftware/module-openapitools

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https://github.com/igor47/notmuchproxy

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https://github.com/iamgoroot/backline

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https://github.com/qazsato/openapi-generate-html

Generate standalone HTML from OpenAPI Specification. 📗

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https://github.com/belgif/openapi-organization

Reusable OpenAPI components about organizations

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Transform OpenAPI specifications into Model Context Protocol (MCP) servers. Generate MCP servers with multiple transport options (HTTP/SSE/Stdio) for Claude Desktop and web integration.

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https://github.com/soenneker/soenneker.quo.httpclients

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https://github.com/thanospan/ngsiv2-sdk-java-auto

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https://github.com/tryagi/weaviate

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https://github.com/gunjangyl/weather_prediction

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https://github.com/xeost/xeocontext

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https://github.com/org-metalib/api-wiser

API Wiser is a tool to automate the generation of complete Maven projects for Java applications directly from your OpenAPI Specification, leveraging OpenAPI Tools to accelerate development and ensure consistency.

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https://github.com/rozhakdev/docstream_backend

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https://github.com/willmeyers/stainless-cli

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https://github.com/meetup/sbt-openapi

Plugin for generating managed code from OpenAPI specifications

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https://github.com/genovaempera/vk-auth

Vkontakte Auth implementation based on OpenAPI. A short profile page and a list consisting of 5 friends of the user.

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https://github.com/omani/nkn-wallet

A next generation NKN wallet with built-in age encryption and NKN OpenAPI support.

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https://github.com/soenneker/soenneker.cohere.openapiclientutil

A thread-safe utility for obtaining Cohere's OpenApiClient singleton.

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https://github.com/danhunsaker/openapi2siege

A simple tool to convert your OpenAPI spec(s) to one or more Siege URL files

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https://github.com/sukkola/openapiv3-filter

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https://github.com/soenneker/soenneker.swashbuckle.intellenumschemafilter

A Swashbuckle Schema filter for Intellenum

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https://github.com/sajith4u/gazettequery

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https://github.com/ningenme/mami-interface

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https://github.com/liamvnastoria/anime-sama

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https://github.com/grab/grabfood-api-sdk-go

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https://github.com/freight-trust/boilerplate-swagger

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https://github.com/renatoelho/metodos-status-codes

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