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: 2026-06-26 00:18:49 UTC
JSON Representation

https://github.com/payroll-engine/payrollengine.backend

Payroll Engine Backend Server Service

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https://github.com/whispir/openapi

An OpenAPI description of the Whispir API

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https://github.com/carapacik/superheroes

Search for superheroes

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https://github.com/uzimaru0000/oreq

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https://github.com/masoudhashemi/gpt3-chat

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https://github.com/sumup/openapi

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https://github.com/timakro/apispec-swaggerinherit

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https://github.com/confuser/exegesis-koa

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https://github.com/unifysell/unifysell-sdk-php

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This is an API sandbox for the Notion API.

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https://github.com/zircote/documentation-review

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https://github.com/jonace-mpelule/openapi-express-decorators

🎉 A lightweight, type-safe library for generating OpenAPI documentation using decorators in Express.js applications. This package allows you to define OpenAPI metadata (paths, parameters, responses, etc.) directly in your controllers using decorators, making it easy to keep your API documentation in sync with your code

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https://github.com/lazzerbeamstudios/spectra-react-native

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Wrapper around zod-to-json-schema, that makes it easier to use it with Fastify & OpenAPI.

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https://github.com/jentic/jentic-api-scorecard

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https://github.com/giis-uniovi/tdrules-st-tdg

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https://github.com/tada5hi/trapi

TRAPI is a collection of packages to create/generate metadata for REST-APis and generate swagger documentations.

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https://github.com/dev-openapi/protocol

国内开放平台接口协议，存放protobuf文件

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https://github.com/seven-io/api-schemes

Official API schemes for seven.io.

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https://github.com/oliviagallucci/csec490

🧢➡️🎓

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https://github.com/oapicf/openapi-ipify

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https://github.com/kevinthulnith/php-crud-api

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https://github.com/mikybars/openapi-generator-mill-plugin

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https://github.com/x52dev/double-int

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https://github.com/christianjtr/express-api-mongodb-docker-jest-supertest

API RESTFul implementation to put into practice concepts like dockerization, e2e tests, swagger documentation, and others.

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Skitt Backend

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https://github.com/sap/aas-mcp-server

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https://github.com/mermade/openitv

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A Command Line Interface (CLI) tool for serving, validating, and linting OpenAPI specifications.

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https://github.com/vltr/middle-schema

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https://github.com/stacksjs/ts-open-api

OpenAPI TypeScript automations.

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https://github.com/xdev-software/brevo-java-client

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