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/libninjacom/readme-rs

readme client, generated from the OpenAPI spec.

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

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

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

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

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https://github.com/jcs090218/swagger-it

Automatically generate the swagger.io yaml file for your project.

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

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

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https://github.com/chihebnabil/openapi-graft

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

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

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

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https://github.com/fly-playgroud/go-postman

an go postman lib

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https://github.com/saibotsivad/glopen

GLobbify OPENapi: Glob a folder structure into an OpenAPI definition and API driver.

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https://github.com/k-kinzal/oas-fake-php

Intercept HTTP requests, validate against OpenAPI schemas, and generate fake responses for testing

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https://github.com/neelagarwal98/modular-equity-research-system

A prototype application that automates financial equity research using a coordinated multi-module architecture. It combines the power of OpenAI's GPT-3.5-turbo, Serper API for Google search and RAG (Retrieval-Augmented Generation) to deliver accurate, well-sourced financial analysis reports with confidence scoring.

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GripMock OpenAPI Specification

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https://github.com/vicjun22/contract-first-with-swagger_spring-boot

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https://github.com/opastorello/unifi-api-docs

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

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

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Some scripts to analyse the tools listed in 'Awesome OpenAPI'

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https://github.com/jbdoumenjou/openapi-go

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

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

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https://github.com/griptape-ai/griptape-cloud-python-client

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https://github.com/mizcausevic-dev/vapor-saas-billing-engine

Swift Vapor billing engine for subscription lifecycle, proration, dunning, and replay-safe webhook idempotency.

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

OpenAPI Query and Path Parameter Formatter.

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https://github.com/speakeasy-sdks/template-speakeasy-bar

A template for the Speakeasy Bar starter SDK.

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https://github.com/nithidol/swagger-converter

Swagger specifications and convert to AsciiDoc and PDF with a custom font.

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https://github.com/aydanrahimova/linkedinclone

This LinkedIn clone replicates key features of the professional networking platform, allowing users to manage profiles, create posts, comment, react, connect with others, follow organizations, and explore job opportunities. Advanced features include creating organizations and applying for jobs.

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

Automatically updates the Soenneker.Instantly.OpenApiClient package

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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/patarapolw/ts-openapi-fastify

Fastify with OpenAPI and typescript-json-schema example

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https://github.com/alpdr/gindocnic

An OpenAPI 3.1 specification generator for Gin Web Framework

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https://github.com/cstrp/telestash

A Telegram-powered storage build with nuxt 4 & tauri (desktop app for all platforms).

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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/jonatandb/weatherapp_api

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https://github.com/eliona-smart-building-assistant/go-eliona-api-client

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https://github.com/faisalaffan/community-waste-collection-api

REST API for community waste collection — households, pickups, payments, and reports. Built with Go Fiber

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https://github.com/soenneker/soenneker.attributes.publicopenapiobject

For decorating objects that should be publicly accessible to see within OpenApi

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https://github.com/hmartiins/mvp-fullstack-backend-puc-rio

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https://github.com/esn8der/tour-of-heroes-api

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https://github.com/gopad/gopad-python

Gopad: SDK for Python

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https://github.com/ndrsg/openapi-trait

Use rust macros to derive a trait from OpenAPI that you can implement

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https://github.com/omermecitoglu/openapi-code-generator

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https://github.com/dacr/counters

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https://github.com/ke4nec/swagger-ui-electron

Wrap Swagger UI with Electron

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https://github.com/gpbultz/apidocandmock

🔧OpenApi extensions and Mocking objects using Bogus

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https://github.com/robsonlmds/java-screenmatch

Este projeto é uma aplicação Java que utiliza uma API para buscar informações sobre séries de TV e seus episódios, permitindo que os dados sejam armazenados e listados através de um repositório.

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https://github.com/nicat-as/balance-notifier

Application for integrating with different openbanking apis of banks and track balance increase and then notify

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https://github.com/lsegg/delilah-resto

This project proposes the creation of an online ordering system for a restaurant.

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https://github.com/domahidizoltan/assessment-faceit

Assessment project for Faceit

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https://github.com/hmarcuzzo/fastgear

Python library for FastAPI, boosting SQLAlchemy and Redis with pagination, error handling, and session management.

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https://git.hiifong.cc/mirrors/redoc

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https://github.com/ubill-ge/sdk-php

PHP SDK for working with the UBill API

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

:books: Online Bookstore API Specification. Full Stack Web Developer training @ https://technofuturtic.be.

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https://github.com/davidmosiah/delx-agent-utilities

Open-source stateless utility tools for AI agents: URL, DNS, TLS, OpenAPI, x402, JWT, CSV/JSON, cron, and composite reports.

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https://github.com/esn8der/todo-app

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https://github.com/miskler/pytorrent

A service for hosting mods and downloading them from Steam.

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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/miensoap/kishelper

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https://github.com/waterrmalann/openapi-editor

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https://github.com/belgif/openapi-location

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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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