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/airstack-xyz/oas

The OpenAPI Specification (OAS) for Airstack Hubs & Webhooks API

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https://github.com/rocket-org-imdeepmind/rocketswagger

RocketSwagger is a hosted Swagger UI instance that allows users to visualize and interact with OpenAPI documentation.

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https://github.com/workloads/pathfinder-openapi-specs

OpenAPI Specs for Pathfinder

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https://github.com/nicksp/rest-api-starter

Production-grade REST API starter template

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https://github.com/allansomensi/tickify-api

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https://github.com/dev-junehee/swimz

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https://github.com/rspereiratech/openapi-collection-generator-postman

Postman collection generator plugin for OpenAPI specifications — converts OpenAPI specs into ready-to-import Postman collections (v2.1.0).

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https://github.com/rspereiratech/openapi-collection-generator-samples

Sample Maven project demonstrating the openapi-collection-generator-maven-plugin — generates Postman and Insomnia collections from an OpenAPI 3.0 Pet Store specification.

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https://github.com/dcrichards/go-to-openapi

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https://github.com/antoniojvargas/smartcar

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

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https://github.com/luolingchun/star-openapi

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https://github.com/mermade/oas-containers

Docker/podman containers for OAS documentation and registry

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https://github.com/vahor/docs-template

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https://github.com/ophiosdev/openapi-generator-di

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

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https://github.com/ah00ee/python-league

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https://github.com/vshisterov/openapi2jira

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https://github.com/cumulocity-iot/cumulocity-swagger-openapi

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https://github.com/matorikkusu/cleanarchitecture

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Orca Scan OpenAPI Specification

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https://github.com/taka-wang/queue-management-system

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https://github.com/diegoaltoworks/ts-node-api

I know, yet another ts boilerplate, with `tRPC` and `openapi.json` auto generated docs.

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https://github.com/minterteam/node-grpc-gateway

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https://github.com/asrieldreemurrgm/microservices_online_selling

A Java 21 Spring Boot microservices platform for managing clients, products, and sales. It leverages MongoDB for persistence, Spring Cloud Config Server for centralized configuration, OpenAPI/Swagger for API documentation, and Feign clients for inter-service communication.

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https://github.com/intellifi-nl/brain-rest-api-spec

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https://github.com/mizcausevic-dev/kinetic-api-gateway

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https://github.com/buonzz/ph-locations-api

REST API for serving Cities, Barangays, Provinces and Regions in Philippines

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https://github.com/valpere/trytrago

API server for a multilanguage dictionary written in Golang.

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https://github.com/funkeyfreak/msgraph-openapi

A buildable OpenAPI v3 description for Microsoft Graph

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https://github.com/himenon/openapi-parameter-formatter

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https://github.com/alexandrelamberty/bookstore-api-spec

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

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https://github.com/dperez3/oapi-generator

Generate OpenAPI documents from multiple Swagger v2 or Open API v3 documents.

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

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https://github.com/soenneker/soenneker.rebrickable.clientutil

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

A thread-safe singleton HttpClient for Wise's OpenAPI integration.

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https://github.com/lsanchezvv/swagger-express-api-baseline

Baseline to create a swagger-node-runner project. Uses the openApi standard.

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https://github.com/nachotoast/uoa-discords

Services and projects of UoA Discords.

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https://github.com/anmolverma404/ai-image-generation

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https://github.com/etherman-os/backcraft

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

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

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https://github.com/fvillanuevape/spring-boot-openapi-oke

Article API Spring Boot and Kubernetes - Spring Boot Open API OKE, es una demo sobre como usar los servicios de kubernetes de oracle cloud para desplegar una API desarrollado en spring boot y de igual manera la documentación de la API usando OAS 3.0.0.

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https://github.com/dacr/counters

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https://github.com/gpbultz/apidocandmock

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

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https://github.com/maemreyo/oas2ts

A Node.js tool that converts OpenAPI YAML schemas into TypeScript types and interfaces, with support for recursive `$ref` resolution and customizable file structure.

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https://github.com/cicatriiz/cdisc-library-mcp-server

DXT-packaged MCP server for the CDISC Library (discovery, Biomedical Concepts, SDTM Dataset Specializations)

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https://github.com/dfberry/azure-rust-mcp-server-apim

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https://github.com/rudeboyone/tarefastest

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https://github.com/letehaha/walutomat-sdk

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