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/smartrecruiters/openapi-schemas-validator
Schema validators for api documentation in OpenAPI Specification 3.x format.
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https://github.com/kubukoz/swaggins
[retired] OpenAPI -> Scala model generator I wrote in 2018-2019.
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https://github.com/cubahno/specs
Collection of different OpenAPI specs for testing purposes
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https://github.com/falberthen/koalesce
Koalesce is a .NET distributed library that coalesces multiple OpenAPI definitions into a single document.
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Last synced: 16 Feb 2026
https://github.com/levinine/functional-tests
Java-based Cucumber Test Automation Framework for UI and REST API Testing
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https://github.com/rawtoast/zenko
Bun-first TypeScript generator for OpenAPI schemas using Zod for type-safe helper functions
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https://github.com/ryomendev/swagger-openapi
This repository provides a hands-on guide to integrating Swagger (OpenAPI) with Node.js and Express for API documentation. Learn to define endpoints, request bodies, and responses while testing APIs interactively using Swagger UI. Ideal for beginners and professionals improving API documentation. 🚀
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https://github.com/monarch-initiative/monarch-trapi-kp
NCATS Translator ARA TRAPI wrapper for the Monarch Initiative system
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https://github.com/kemingy/offapi
OpenAPI template files for offline usage.
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https://github.com/albenik/twirp-openapi-gen
A Twirp RPC OpenAPI generator implemented as `protoc` plugin
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https://github.com/aklinker1/zeta
Composable, testable, OpenAPI-first backend framework with validation built-in
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https://github.com/juliacomputing/openpolicyagent.jl
Julia OpenPolicyAgent Client, Server and CLI.
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https://github.com/onlyphantom/revconnexion
RevConnextion is a RESTful API application built on top of Connexion and can be used as a standalone post-workshop survey system
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https://github.com/codecentric/reedelk-openapi
OpenAPI v3 JSON/YAML serializer/deserializer
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https://github.com/jansdhillon/landscape-openapi-spec
OpenAPI specification for Landscape Server's API
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https://github.com/angellusmortis/boundlexx-ui
Frontend for Boundlexx API.
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https://github.com/chrisallenlane/unifi-mcp
MCP server for Unifi API, written in Go (MIRROR)
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https://github.com/grandlinex/swagger-mate
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https://github.com/soufantech/supertest-openapi-validator
Performs OpenAPI contract checks with supertest.
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https://github.com/oapicf/openapi-okta-ip-ranges
OpenAPI specification and a set of generated API clients for Okta IP Ranges
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https://github.com/mmilk23/image_unmirrorer
Image Unmirrorer is an API that allows users to upload an image and receive a horizontally mirrored version in return. Developed with Elixir, this project can be easily run using Docker, making it simple and quick to set up.
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https://github.com/lofienjoyerr/cafeproject
Backend часть веб-приложения для управления заказами в кафе
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https://github.com/aysenurcftc/advancedrag-numpy
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https://github.com/abengl/ntt-project3-transactionms
The Transaction microservice is part of a banking system designed to handle financial transactions, such as deposits, withdrawals, transfers, and historical data, associated with customer accounts.
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https://github.com/severinglion/spec2lambda
spec2lambda is a spec-driven codegen tool for building scalable AWS Lambda APIs in TypeScript. It automates type-safe handler scaffolding and project structure from your OpenAPI spec—add endpoints by updating your spec, run codegen, and implement handler stubs. Fast, maintainable, and opinionated.
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https://github.com/codewithagents/openapi-ts
Glue packages for TypeScript — connecting OpenAPI, forms, validation and React Query
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https://github.com/stoneliucs/salt
Structured API Language for OpenAPI schema generation, TypeScript generation, and zod validation generation.
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https://github.com/ripta/openapi-promop-crd-hack
(HACK) Generating an OpenAPI Schema to get proper $ref in Prometheus Operator's CRDs
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https://github.com/strataljs/stratal
A modular framework for building Cloudflare Workers with dependency injection, OpenAPI documentation, queues, cron jobs, and more.
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https://github.com/xdev-software/openapi-client-maven-template
Checkout the wiki for more info
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https://github.com/ujjwalguptaofficial/fortjs-swagger
Swagger module for fortjs
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https://github.com/ochaochaocha3/bcdice-api-oas3
OAS3形式で記述されたBCDice APIの仕様
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https://github.com/charanjit-singh/mongodb-atlas-data-api
A wrapper around the Mongodb Atlas Data API to make it easier to interact with the API from a Node.js application.
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https://github.com/ron96g/koa-x-oapi-validator
Koa port of the popular express-openapi-validator library.
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https://github.com/zachary013/spring-angular-book-network
This is a Book Social Network application, where users can exchange and borrow books from different categories. This application is built using the Spring framework for the backend, and angular for the frontend.
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https://github.com/oapicf/endoflife.date-api-clients
A set of endoflife.date SDK in multiple languages generated from Open API specification
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https://github.com/oapicf/openapi-iplocation
OpenAPI v3 specification and a set of generated API clients for iplocation.net
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https://github.com/marianapatcosta/weatherison
Web app developed with VueJS and NodeJS/Express to compare the forecast of different weather apis.
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https://github.com/pilotpirxie/express-endpoints-collection
Create API endpoints in Express with TypeScript inference, validation and OpenAPI 3 schema out of the box
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https://github.com/fe-hyunsu/liveweather
⛈ Location base, live weather service.
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https://github.com/mikelgoig/codeception-openapi
✔︎ Codeception module for contract testing with OpenAPI.
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https://github.com/peter/python-content-api
Example Python Content API and microframework using JSON Schema and OpenAPI based on PostgreSQL, MonboDB, and Flask
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https://github.com/maks11060/typescript-libs
Useful TypeScript utilities
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https://github.com/simplify-framework/converter
Convert from Serverless Framework's YAML definition to OpenAPI 3.0 specs that is compatible with Simplify Framework specs definition.
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Last synced: 04 May 2026
https://github.com/soenneker/soenneker.openai.openapiclientutil
A thread-safe utility for obtaining OpenAI's OpenApiClient singleton.
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https://github.com/speclynx/vscode-openapi-toolkit-website
SpecLynx OpenAPI Toolkit WebSite
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https://github.com/orliluq/trivia
🎃 Backend Challenge (Java): API para una trivia de Halloween! 🎃
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https://github.com/dacr/web-echo
A websocket/webhook JSON data recorder with API
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Last synced: 04 May 2026
https://github.com/pierrialexandervidmar/apibasic-dotnet
Api .NET 8.0 com CRUD básico (ASP.NET CORE).
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https://github.com/ringods/unifi-api-spec
OpenAPI Specification for the Unifi API
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https://github.com/houllette/elixir-sdk-generator
Production-ready GitHub template for generating Elixir SDKs from OpenAPI specs with automated regeneration, connection pooling, retries, and comprehensive testing.
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https://github.com/fern-api/sdk-starter
The easiest way to get started generating an SDK with Fern! Supported languages: TypeScript, Python, Go, Java, C#, PHP, Ruby
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https://github.com/fbjorn/apity-demo
Demo application using Apity for making API calls
Last synced: 21 Apr 2026
https://github.com/blueswen/mkdocs-redoc-tag
A MkDocs plugin supports adding Redoc to the page.
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https://github.com/dominikjalowiecki/blockchain-event-ticketing-app
Web application for selling tickets using blockchain technology.
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https://github.com/recontentapp/openapi
Recontent's OpenAPI definition
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Last synced: 07 Jul 2025
https://github.com/libninjacom/postman-rs
Postman client, generated from the OpenAPI spec
Last synced: 10 May 2026
https://github.com/tpt-research/jibril-documentation
Documentation of the Jibril API, written in OpenAPI 3.0 YAML
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https://github.com/rocco0619/full-stack-fastapi-template
Full stack, modern web application template. Using FastAPI, React, SQLModel, PostgreSQL, Docker, GitHub Actions, automatic HTTPS and more.
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https://github.com/veilair/opensource-development
An ongoing list of great programmers and wonderful software projects you can support
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https://github.com/nu0ma/nextjs-app-with-openapi
MSW + aspida + testing-library + Chakra UI + React-Query
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Last synced: 20 Jan 2026
https://github.com/gearnode/rebar3-openapi
A Rebar3 plugin to generate files based on OpenAPI specification files.
Last synced: 15 Jun 2025
https://github.com/openapi/awesome-corporate-standards
😎 A curated list of international standards, frameworks, and certifications that define how organizations operate, scale, and stay compliant.
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Last synced: 15 May 2026
https://github.com/ron96g/oas-linter
Editor-UI-Suite with JSON-schema support and API to lint OpenAPI Specification (OAS) files. Uses Spectral to check OAS based on rulesets
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Last synced: 16 Feb 2026
https://github.com/oapicf/openapi-azureipranges
OpenAPI specification and a set of generated API clients for Azure IP Ranges and Service Tags
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https://github.com/dev-openapi/douyin-webapp
一个用protobuf生成的抖音移动/网站应用开放接口
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Last synced: 24 Apr 2026
https://github.com/arnobt78/openai-chatbot--reactvite
AI-Chat-Bot is a complete project example with OpenAI ChatGPT and React-Vite, using OpenAI API, Emoji-Mart, Uuid, and have a Chat History, New Chat Creation features, and deploy on Vercel.
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Last synced: 12 Mar 2025
https://github.com/phlx0/living-docs
Keep documentation alive — Claude Code plugin that auto-detects and fixes stale docs after code changes
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https://github.com/copyleftdev/synapse-spec-first
Doc-First Event Processing: A demonstration of specification-driven development with Go, OpenAPI, AsyncAPI, and Testcontainers
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https://github.com/mduesterhoeft/approaches-to-api-doc-talk
This repository accompanies a talk on Approaches REST API documentation.
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https://github.com/indrasaputra/arjuna
My playground to implement everything I find it interesting
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https://github.com/ioniccommerce/ionic_sdk_python
Ionic Commerce Python SDK
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https://github.com/libninjacom/paper-mc-rs
PaperMC client, generated from the OpenAPI spec
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https://github.com/voidint/swagger-hub
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https://github.com/optimics/monorepodoc
JSDoc wrapper that generates documentation for each Lerna package
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Last synced: 06 May 2026
https://github.com/happybono/businfosystem
Bus Information System for Gyeonggi and Incheon Province, South Korea. NodeMCU (ESP8266) has been used as main microcontroller unit, and displays the bus information on the 0.96" SSD1306 I2C OLED.
arduino arduino-ide busarrival busarrivaltimeprediction cplusplus cpp esp8266 esp8266-projects nodemcu-esp8266 open-api openapi openapis public-api public-apis wifi wifi-network
Last synced: 16 Jun 2025
https://github.com/mihailfox/proxmox-openapi
Tooling to scrape the Proxmox API viewer and generate OpenAPI specifications.
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Last synced: 16 May 2026
https://github.com/abengl/ntt-project2-accountms
This Account microservice is part of a banking system designed to handle CRUD operations for banking accounts and transactions. It provides endpoints for creating, retrieving, updating, and deleting accounts, as well as managing transactions associated with each account.
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https://github.com/nanato12/qiita-openapi
Qiita API v2 OpenAPI
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https://github.com/r7kamura/imgur-openapi
Unofficial OpenAPI spec for Imgur API.
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https://github.com/lukehedger/contract-first
JSON Schema-based, client-server data definitions for contract-first development
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https://github.com/szubajak/game
Advanced Template for modern .Net & React projects. Solid fundamentals for new system or sub-system.
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https://github.com/anoni-net/onionoo-fastapi
Semantic/OpenAPI proxy for the Tor Metrics Onionoo API, built with FastAPI for easier integration and automated analysis.
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https://github.com/fx-world/euvd-api
This project provides a OpenApi definition file for the European Union Vulnerability Database API.
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https://github.com/membrane-php/membrane-core
Membrane is a general purpose input validation library, supports both PHP Attributes and OpenAPI specifications
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https://github.com/tryagi/assemblyai
C# SDK based on official AssemblyAI OpenAPI specification
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https://github.com/interserver/mailbaby-mail-api-old
API Server for the MailBaby Email Services
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https://github.com/compilerla/toggl-py
Python implementation of the Toggl API, autogenerated from their OpenAPI spec
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