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/antoniojvargas/smartcar

A Node.js and Express API that simulates Smartcar vehicle endpoints, including vehicle info, doors, fuel, battery, and engine control. Includes Swagger (OpenAPI) documentation and unit tests with Mocha, Chai, and Sinon.

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Last synced: 13 Apr 2026

https://github.com/e22m4u/ts-openapi

TypeScript decorators for generating The OpenAPI Document

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Last synced: 12 Apr 2025

https://github.com/astroway/astroway-php

Official PHP SDK for the AstroWay API — PSR-18 HTTP client (BYO Guzzle/Symfony/Nyholm), DTOs, mock client, PSR-3 logger, Guzzle promises concurrency. Natal, synastry, transits, Vedic, Tarot, Human Design, AI horoscopes. PHP 8.2+.

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Last synced: 30 May 2026

https://github.com/nebula-news/convertkit-openapi

ConvertKit's OpenAPI Spec

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Last synced: 04 Jan 2026

https://github.com/apprexp/govsg2oas

A project which aims to convert existing government public-facing APIs into the OpenAPI 3 specs.

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https://github.com/kadykov/mcp-openapi-schema-explorer

MCP server providing token-efficient access to OpenAPI/Swagger specs via MCP Resources for client-side exploration.

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https://github.com/cedricziel/bondora-openapi-php

Generated client for the Bondora API

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https://github.com/jenderenco/inkifyai-doc-generator

AI-powered tool that generates comprehensive, human-readable documentation from OpenAPI/Swagger specifications using large language models.

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https://github.com/ahmadnassri/node-oas-request-readme

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https://github.com/mohammadshabazuddin/custom-website-chatbot

Created a personalized website chatbot to provide automated support and enhance user engagement using NLP models.

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https://github.com/rodrigokamada/angularsp-202210

Repositório utilizado no evento AngularSP com o tema "API REST em Node.js: Boas práticas em produção".

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

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

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https://github.com/90dy/ts-openapis

Typescript pre-generated OpenAPIs clients

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https://github.com/alejandrosoares/speakwiz

Raise your confidence in English by practicing and speaking with this platform. Developed using Django Rest Framework and React.

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https://github.com/glebmish/intervals-icu-cli

Command-line client for the intervals.icu training API, built for AI-agent use. 148 operations.

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https://github.com/ildus/ingres

Ingres (Vector) Go Library

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https://github.com/mcsym28/open-api-client-ex

OpenAPI generator AND client for Elixir

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https://github.com/moontai0724/openapi-types

TypeScript types for OpenAPI specification. (v3.1 only now)

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https://github.com/mcclowes/docusaurus-plugin-omg

Docusaurus plugin to embed omg.lol content (statuses, weblog posts, pastes) in your site

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https://github.com/haryoiro/oasc

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https://github.com/lenivaya/expensify

📊 Modern, full-stack expense tracking application with rich analytics, GDPR-compliant privacy features, and comprehensive budgeting tools. Built with Next.js 15 and NestJS.

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https://github.com/t-huyeng/zensus-gis-nrw-api

Zensus 2011 Einwohnerzahlen API

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https://github.com/thanospan/ngsiv2-sdk-java-auto

Auto-generated NGSI v2 SDKs for Java

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

Bump.sh client, generated from the OpenAPI spec

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https://github.com/alexandrelamberty/openapi-stoplight-doc-action

:zap: GitHub Actions that generate API documentation from your OpenAPI specification using Stoplight.

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https://github.com/edavis25/crypto_history_api

API for retrieving personally scraped historic crypto price data from various exchanges.

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https://github.com/jathanism/okapi

OpenAPI 3.x client and CLI generator for Go

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https://github.com/marianmeres/file-based-routes

Mirror filesystem based routes to express endpoints.

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https://github.com/yo-mah-ya/openapi-with-express

OpenAPI-with-Express implemented in TypeScript

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https://github.com/tryagi/weaviate

C# SDK based on official Weaviate OpenAPI specification

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

Kleister: SDK for Golang

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https://github.com/tomashubelbauer/postgrest-openapi-zapier-fieldschema

Postgrest OpenAPI to Zapier FieldSchema mapper

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https://github.com/lenaar/column-operations-api

Flask API with basic calculations

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https://github.com/soenneker/soenneker.shippo.openapiclient

A .NET client generated from the Shippo OpenAPI schema, updated daily

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https://github.com/sbyeol3/movie-list

Demo Web Listing Movies with Open Movie API 🎫

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https://github.com/xgmsx/go-api-first-demo

Demo Go project for API-first development with OpenAPI and Proto files.

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https://github.com/soenneker/soenneker.highlevel.runners.openapiclient

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https://github.com/remarkablemark/janephp-template

🌱 JanePHP template

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https://github.com/satyam-seth/weather-backend-app

A Django REST Framework backend for accessing climate datasets from the UK MetOffice.

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https://github.com/kacperfaber/codziennemotto_pl_server

🎈 Spring API for CodzienneMotto.pl. Allows you to create a lists of daily quotes, invite users to join your list and schedule quote to specific day 🎈

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https://github.com/colorfulcompany/node-indeed-job-campaign-api-client

Indeed Job Campaign API Client with automatically OAuth Token refreshing

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https://github.com/sjefvanleeuwen/gemma-zaken

OpenAPI .NET Core test implementations for ZDS / Zaakgericht werken

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Last synced: 13 Apr 2026

https://github.com/ahilke/openapi-microservice-playground

A demo project to showcase and experiment with various OpenAPI technologies in a microservice environment.

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

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

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https://github.com/m-mdy-m/openapi-playground

Explore OpenAPI & Swagger with Node.js! Learn code-first & design-first workflows, routes, documentation, reusability, data types, & more. Experiment with security, hosting, and code generation.

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https://github.com/unexist/showcase-openapi-asciidoc

Showcase for OpenApi/Swagger with AsciiDoc [MIRROR]

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https://github.com/jkawamoto/llama-cpp-api

OpenAPI specification for the LLama.cpp HTTP Server

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https://github.com/sla-ppy/gocusign

[F] Backend integration for (docu)ment (sign)ing made with (Go)

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

A simple async API framework based on Starlette.

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https://github.com/sigwinhq/openapi-specs

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https://github.com/nana4rider/openapi-ui

OpenAPI UI

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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/soenneker/soenneker.twilio.openapiclient

A .NET client generated from the Twilio OpenAPI schema, updated daily

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https://github.com/rpstreef/openapi-node-example

OpenAPI Node code example

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https://github.com/alexdemure/gadfastopenapi

Customize and override OpenAPI schema details in FastAPI with ease

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https://github.com/johejo/go-github-rest-api

Auto Generated GitHub's v3 REST API Client for Go

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https://github.com/claudioaltamura/spring-boot-superheroes-example

Spring Boot Superheroes example

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https://github.com/osafune-cho/coco-backend

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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/soenneker/soenneker.windmill.openapiclientutil

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

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

Generate Documentation and Code from OpenAPI Spec.

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https://github.com/zaydiscold/goodreads-cli-mcp-api

Goodreads CLI (MCP + API) — unofficial hand-mapped Goodreads web surface, driven by a TypeScript CLI + MCP server over one shared engine (full CLI↔MCP parity). The API map is the product.

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Last synced: 03 Jul 2026

https://github.com/localgod/minado

Generating OpenApi specifications and API management policies from Azure Logic App Standard

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https://github.com/hoseungme/typed-express

Make express.js fully-typed and serve automatically generated OpenAPI Specification object

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Last synced: 12 Apr 2026

https://github.com/zaydiscold/alltrails-cli-mcp-api

AllTrails CLI (MCP + API) — unofficial AllTrails API map + CLI + MCP: trails, maps, GPS routes, recordings, lists, reviews. The API map is the product.

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https://github.com/emmrys-jay/micro-order

A micro-service based order and delivery application

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Last synced: 12 Apr 2026

https://github.com/ziul/swagger-operator

A Kubernetes operator that automatically discovers services annotated with OpenAPI/Swagger documentation and aggregates their documentation in a single UI.

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Last synced: 13 Apr 2026

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

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

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Last synced: 07 Jun 2026

https://github.com/instantan/web

Build robust web applications with pure Go. No external dependencies, just the power of the standard library.

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Last synced: 03 May 2026

https://github.com/kemalkochekov/effectivemobiletestproject

Effective Mobile company's Test Project

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Last synced: 12 Apr 2026

https://github.com/habibun/symfony-api-platform

Symfony with API Platform

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Last synced: 12 Apr 2026

https://github.com/kozjulia/task-manager-gradle-flyway

Task manager (gradle + flyway)

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Last synced: 07 Apr 2026

https://github.com/techinpark/jira-cli

Open source Jira CLI for Jira Cloud REST API v3. Manage issues, comments, transitions, worklogs, and JQL from the terminal or LLM agents.

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Last synced: 26 Jun 2026

https://github.com/muellerconstantin/taskcare-api

Backend of the TaskCare collaboration platform for managing tasks in a team.

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Last synced: 08 Apr 2026

https://github.com/watchakorn-18k/template-swagger-to-mcp

Bootstrap any OpenAPI/Swagger spec into a FastMCP-powered Model Context Protocol server so Claude Code, Codex, and other AI copilots can call your API in minutes.

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https://github.com/lafronzt/standards-api

AI-generated POC for a ReviewOps standards API that stores versioned engineering rules and serves latest applicable standards for automated code review workflows.

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Last synced: 29 May 2026

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

Insomnia collection generator plugin for OpenAPI specifications — converts OpenAPI specs into importable Insomnia v4 exports.

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Last synced: 29 May 2026

https://github.com/vicradon/petstore

A modified version of the Petstore API offered by SwaggerHub

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

Swagger/OpenAPI RESTful API for Cumulocity

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https://github.com/rspereiratech/openapi-collection-generator-maven-plugin

Maven plugin that generates Postman and Insomnia collections from OpenAPI specifications.

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https://github.com/app-generator/json-api-specs

JSON-API - OPENAPI Unified Interface | AppSeed

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https://github.com/beshkenadze/openapi-mcp-generator

Transform OpenAPI specifications into Model Context Protocol (MCP) servers. Generate MCP servers with multiple transport options (HTTP/SSE/Stdio) for Claude Desktop and web integration.

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

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

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

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https://github.com/pallassystems/typr

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https://github.com/iamgoroot/backline

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https://github.com/fibercrypto/fibercryptopy

Python client library for FiberCrypto wallet API classes

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https://github.com/javaaidev/openapi-mcp-server

Convert OpenAPI spec to MCP server

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https://github.com/offlabel-scaffolds/scaffold-fastapi-backend

FastAPI Python backend with SQLAlchemy, Alembic, and OpenAPI

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https://github.com/hello-sycon/sycon-api

Production API documentation for Sycon Cloud (OpenAPI + usage guide)

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https://github.com/sillyash/swagger-ui-clickable-links-plugin

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https://github.com/duquejo/quarkus-tokencache-microservice

Resilient-ready external token cacheable service Proof of concept

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

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

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https://github.com/gunjangyl/weather_prediction

This is a simple Weather App that allows users to search for real-time weather conditions of any city using the OpenWeather API. It displays temperature, humidity, and weather conditions in a user-friendly interface. The app is built using HTML, CSS, and JavaScript for a seamless user experience.

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