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/fmarmol/openapigen

openapi yaml generation directly from golang

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https://github.com/entur/abt-bob-openapi

OpenAPI artifacts for the BoB standard

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https://github.com/chempik1234/golang-microservice-example

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https://github.com/soferai/soferai-openapi

OpenAPI specification for the Sofer.Ai API

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https://github.com/libninjacom/twilio-rs

Twilio client, generated from the OpenAPI spec, with love from the team at Libninja

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

A work-in-progress command-line utility for interacting with Stainless. This project is in no way affiliated with or supported by Stainless.

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https://github.com/clarius/azure.functions.openapi

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https://github.com/mrxz/javalin-openapi-apt

Annotation processing to generate OpenAPI specification from source code using Javalin

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https://github.com/huakunshen/jsr-client

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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/ron96g/dev-tools

Collection of useful developer tools. Including JSON/Yaml Formatting, OpenAPI/Swagger Validation

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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/mitaketw/qmi-openapi-java

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https://github.com/faluapp/falu-openapi

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https://github.com/makefile-inc/openapi

Makefiles includes for generations client and servers and convertions openapi specs

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https://github.com/nekogakure/talkitapi-docs

TalkitのAPIドキュメント

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https://github.com/heiwa4126/terraform-apigw-ex2-openapi

TerraformでAWS Lambda (Python) & API Gateway (powered by OpenAPI) のサンプル

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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/xutyxd/photron

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https://github.com/fibercrypto/libskycoin-android

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https://github.com/mkloz/uevent-backend

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https://github.com/andyfrith/hono-api-starter

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https://github.com/dhurtado714-itesm/nestjs-swagger

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https://github.com/aleksandryackovlev/mock-api-example

This is an example project for learning how to mock API's using Openapi spec. It's intended to be used as a reference for the blog post "How to Mock an API Server in JavaScript"

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https://github.com/brokenprogrammer/mswg-gen

Custom OpenAPI generator that is used to generate swagger documentation using comments.

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https://github.com/unitedideas/nothumansearch

Search engine for AI agents — ranks sites by agentic readiness (llms.txt, OpenAPI, MCP, ai-plugin). MCP server, REST API, full-text search. 8,000+ indexed sites.

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https://github.com/stainlu/stainful

The open-source Stainless — point your existing stainless.yml at it and get the same idiomatic Python SDK. Zero migration. No SaaS.

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https://github.com/mermade/semoasa-tools

Tools to manipulate Semoasa documents

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https://github.com/go-api-libs/toggl

Go library for the toggl. The Toggl API allows developers to interact with Toggl's time tracking service programmatically. It provides endpoints for managing time entries, projects, clients, tags, and user information. With this API, you can automate time tracking, generate detailed reports, and integrate Toggl with other tools and services.

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https://github.com/noi-techpark/opendatahub-swaggerui

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https://github.com/libninjacom/petstore-ts

Petstore client, generated from the OpenAPI spec

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https://github.com/marcin-brzozowski/openapi-examples

CLI application for generating OpenAPI examples

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https://github.com/uisawara/usimplehttpserver

SimpleHttpServer for Unity. UnityアプリにシンプルなAPIサーバー機能を持たせるためのpackage

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https://github.com/alexdemure/fastoas

Customize and override OpenAPI schema details in FastAPI with ease

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https://github.com/postman-cs/postman-bootstrap-action

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

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https://github.com/go-giteria/giteria

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https://github.com/lost22git/test-quarkus

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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/thatbeautifuldream/react-api-ref

OpenAPI Docs Viewer

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https://github.com/carturo8/eventhub

RESTful event and venue management API built with Spring Boot, JWT security, and Clean Architecture.

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https://github.com/jdifool/tempest-openapi-tools

OpenAPI specification generator and interactive documentation UI for the Tempest framework.

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https://github.com/tpdlshdmlrkfmcla/covid-19_openapi

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https://github.com/lambda-feedback/evaluation-function-api

OpenAPI Specification and Validation Schemas for the Evaluation Function API

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

:diamond_shape_with_a_dot_inside: Home Automation and Monitoring IoT Software API Specification.

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

:seedling: Gardening Planner API Specification.

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https://github.com/alexandrelamberty/nasa-neows-api-spec

:rock: NASA Near Earth Object Web Service API Specification.

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https://github.com/freight-trust/api-docs

API Documentation for EDI Service

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https://github.com/astoria-gouv/interieur-website

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https://github.com/mohamed255255/mini-order-tracker

Demo app to create and track orders and payments with SOAP / REST endpoints

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https://github.com/joaoemanuell/shopper-node-technical-test

Api for shopper node technical test

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https://github.com/rebecaborges/tsc-base-api

Typescript base api using OpenApi specification rules

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https://github.com/karurochori/base-blockchain

Barebone blockchain node defined by OpenAPI specs with simulation support.

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https://github.com/jetalphastartup/docs

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https://github.com/libninjacom/recurly-rs

Recurly client, generated from the OpenAPI spec

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https://github.com/usings/openapi-shape

Generate TypeScript API contract types from OpenAPI 3.x JSON.

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https://github.com/libninjacom/dhl-rs

Dhl client, generated from the OpenAPI spec

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https://github.com/badsyntax/gatsby-openapi

A mono-repo with a set a gatsby plugins that can be used to build API docs from an OpenAPI specification.

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Last synced: 09 May 2026

https://github.com/kevinoid/appveyor-swagger-java

AppVeyor REST API Client (from Swagger, in Java)

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Last synced: 21 Apr 2026

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

A Swashbuckle Schema filter for Intellenum

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https://github.com/simon-gardier/inventory-flutter-dotnet-app

MyVentory is an app/website built in Flutter with a backend written in Dotnet, hosted on Openshift and developped with modern CI/CD standards

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https://github.com/gopireddy99/receipe_finder

🔍 Recipe Finder is a smart web application that helps users discover delicious recipes by simply entering the ingredients they have. Built with TypeScript, Tailwind CSS, and Python, it offers an intuitive interface and intelligent recipe suggestions based on user input.

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https://github.com/awtkns/openapi-perf-action

Github App and Action Allowing for CI/CD of OpenApi-Perf in Github

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https://github.com/christianhelle/refitter-action

Generate Refit API Client using Refitter

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https://github.com/yossichakim/task-manager-api

Full-stack task manager built with Flask, React, SQLite, JWT authentication, Swagger documentation, automated backend tests, and Render deployment.

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https://github.com/mahmudindev/openapi-jikan-python

Python-based generated Jikan (MyAnimeList) OpenAPI client (Unofficial).

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https://github.com/jjanisheck/botvisibility

When AI agents browse a site that doesn't publish machine-readable metadata or APIs, they fall back to scraping HTML, guessing endpoints, and retrying. That burns 5-100x more tokens per session and silently inflates the cost of every agent interaction. BotVisibility runs 55 automated checks across 5 levels.

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https://github.com/sajith4u/gazettequery

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https://github.com/benaiad/sqlize

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https://github.com/lucasvmarangoni/tasklist

Rest API for task list application, developed with Express, Typescript and Prisma, applying TDD and principles of DDD

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https://github.com/sergey-prudentdev/siteinformant-openapi

Official OpenAPI specification for the Site Informant public JSON API — website uptime, response-time, and SSL monitoring data for developers and AI integrations.

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

趣味開発 all-interface (product name: mami)

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https://github.com/go-api-libs/ipify

Go library for the ipify API. A simple public IP address API, easy to integrate into any application in seconds.

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https://github.com/davutbayik/auto-advisor-ai

AutoAdvisor is an AI-powered business strategy assistant that validates user-submitted business ideas, generates strategic reports using multi-agent reasoning, and delivers actionable insights including a SWOT analysis.

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https://github.com/bas-kirill/muse-project

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https://github.com/excalibase/excalibase-rest

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