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: 2026-07-02 00:22:14 UTC
JSON Representation

https://github.com/matheusvnm/fastpubsub

FastPubSub is a FastAPI-based, high-performance, and easy-to-use Python framework for building asynchronous event stream consumers on Google PubSub.

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https://github.com/speakeasy-api/speakeasy-zod-openapi

Speakeasy Zod OpenAPI Example

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https://github.com/goafabric/callee-service

🌱 Very tiny SPRING Service without Persistence - Also includes a native image build

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https://github.com/alexferl/echo-openapi

OpenAPI middleware for the Echo framework

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https://github.com/vooft/spektor

Schema-first OpenAPI generator for Ktor-server

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https://github.com/opensourcewebsite-org/apidocs-opensourcewebsite-org

OpenSourceWebsite API Documentation

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https://github.com/de4oult/autumn

Modern Python ASGI web framework

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https://github.com/danfmaia/codequery-api

CodeQuery API is a Python/Flask tool designed to serve code-focused AI assistants with the real-time status of a codebase, by allowing seamless querying of a project's file structure and content.

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https://github.com/opengeospatial/ogcapi-workshop

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https://github.com/gorillab/reader-api

reader api service

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https://github.com/edavis25/plex-api-spec

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https://github.com/api-evangelist-tools/api-integration

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https://github.com/chirino/graphql-4-apis

Lets you create a GraphQL gateway services for your openapi documented API services.

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https://github.com/anaptecs/jeaf-generator

JEAF Generator uses UML models to generate code for Spring, REST, OpenAPI, Java and others. Boost your software development efficiency and time-to-market. Bye bye handwritten boiler blade code.

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https://github.com/openapi/openapi-python-sdk

🐍 A fully-featured and blazing-fast Python API client to interact with Openapi®

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https://github.com/CynthiaPeter/CynthiaPeter

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https://github.com/wetix/openapi-doc

WeTix Open API documentation

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https://github.com/dvurechensky-tools/dotnetify

Turn any OpenAPI (swagger.json) file into a runnable C# (.NET) backend project in seconds.

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https://github.com/dapi-labs/outdoc

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https://github.com/directus/openapi

OpenAPI Specification for the Directus API

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Next-generation HTTP router for Go 1.25+ with type-safe handlers, RFC 9457 errors, and built-in OpenAPI generation. Minimal dependencies, blazing performance.

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https://github.com/airlock/microgateway-running-example

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https://github.com/leoek/material-safety-search

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https://github.com/guerinoni/fiuto

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https://github.com/ewenquim/swaglint

Linter for swaggo/swag

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https://github.com/deiteris/api-contractor

A Visual Studio Code extension for working with the API contracts in OpenAPI and RAML formats.

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https://github.com/rhinolabs/docutopia

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https://github.com/reiterus/swagger-symfony

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https://github.com/bump-sh-examples/laravel-design-first

Create your OpenAPI then use it to power your application, covering both request validation and contract testing.

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https://github.com/aaronshaf/confident

Use an OpenAPI (Swagger) design to define express routes, API documentation, and request/response validation

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https://github.com/ealenn/opengarden

Garden assistant, for your seedlings and vegetables. Compatible with Home Assistant & Google Home.

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https://github.com/aeimer/clockify-openapi-spec

In-official Clockify OpenAPI Spec v3

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https://github.com/bump-sh-examples/rails-design-first

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https://github.com/patrickcping/pingone-openapi-specs

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https://github.com/membrane-php/membrane-laravel

Laravel integration for Membrane validation library.

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https://github.com/cristipufu/aspnetcore-openapi-source-generator

Roslyn source generator that automatically creates ASP.NET Core controllers and models from OpenAPI YAML specifications

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https://github.com/rushuinet/jddj-openapi-php-sdk

京东到家开放平台PHP SDK

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https://github.com/captn3m0/kuvera-unofficial-api-specification

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https://github.com/trepaorg/trepa-sdk

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https://github.com/theboeffect/boilerplate

This is a boilerplate ESM, TypeScript, mongoose, openapi, etc. microservice template that I use for my work. It can be run as a docker container or a lambda function.

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https://github.com/zeon256/satay-rs

Sans-IO Rust OpenAPI client generator with typed builders, validation newtypes, and transport-agnostic adapters

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https://github.com/20steps/uptime-robot-bundle

Symfony bundle for service-oriented client for UptimeRobot API v2.0

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https://github.com/e-miracle/kudaping

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https://github.com/turbot/flowpipe-sdk-go

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https://github.com/codecentric/spring-boot-api-first

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https://github.com/zl-asica/kumoauth

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https://github.com/t-huyeng/geoportal-openapis

List of OpenAPI files from Geoportals (HE, RLP, SL)

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https://github.com/mgernand/aspnetcore.endpoints

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https://github.com/divedylan/sardine

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https://github.com/smridge/swagcov

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https://github.com/patoconnor43/heave

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https://github.com/mharrvic/chatgpt-weather-plugin

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https://github.com/biocentral/biocentral_server

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https://github.com/bunnyshellosi/go-sdk

The official GO SDK for the Bunnyshell API.

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

Java client for the Sessionize API

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https://github.com/OpenChargingCloud/OCPIExplorerDesktopApp

An OCPI Explorer as an Electron Desktop App

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https://github.com/havendv/moexiis

C# client library and OpenAPI spec for Moex IIS

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https://github.com/gregorip02/openapi-generator

Intelligent generation of OpenAPI documentation based on your Laravel routes :blue_book:

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https://github.com/sophos/factory-api-client

Official Sophos Factory API client library for JavaScript.

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https://github.com/hoseungme/request-typer

Declare a schema of HTTP Request and Response, and then create type vaildator and openAPI Specification object.

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https://github.com/jhlee0409/claude-plugins

Claude Code plugin marketplace - OpenAPI sync and more

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Last synced: 19 Jan 2026

https://github.com/specmatic/specmatic-mcp-sample-with-spec-kit

This project demonstrates contract-first development using a spec-kit approach where OpenAPI specifications evolve organically through feature development. Each feature analyzes existing contracts for reuse before extending the API, using Specmatic MCP as intelligent guardrails throughout the process.

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https://github.com/artifact-keeper/artifact-keeper-api

OpenAPI 3.1 specification for the Artifact Keeper REST API. 165 endpoints, CI validation, TypeScript + Rust SDK generation.

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https://github.com/dorisoy/dorisoy.openapigenerator

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https://github.com/microsoft/kiota-serialization-text-php

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https://github.com/jaxelr/nancy.template.webservice

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https://github.com/useapi/midjourney-api

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https://github.com/wbcsd/pact-openapi

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https://github.com/hamzamak/dalle-project

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https://github.com/codyadam/rclone-rc

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https://github.com/speakeasy-api/moonshine

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https://github.com/pitzzahh/lrnr

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https://github.com/alextselegidis/easyappointments-sdk

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