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: 2026-02-02 00:23:05 UTC
JSON Representation

https://github.com/angellusmortis/boundlexx

An API to get all things related to the game Boundless

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https://github.com/scriptsmith/up-datasource

Up Bank API Grafana Datasource Plugin

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https://github.com/singhdivyank/pdf_extraction

Perform OCR on a PDF or image file using GPT and AWS Textract

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https://github.com/aidenhadisi/chat-gpt-go

Go API Client for OpenAI's GPT3.5 (ChatGPT) API.

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https://github.com/mloberg/openapi-stitcher

Stitch together multiple files into an OpenAPI specification

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https://github.com/lallenfrancisl/gopi

Easy go openapi 3.0 docs generator to use when building APIs

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https://github.com/caohanyang/rest_crawler

Crawl existing REST html documentations.

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https://github.com/rrjanbiah/legacy2openapi-spec

Legacy to OpenAPI spec conversions of APIs for easy SDK code generations

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https://gitlab.com/lx-industries/rmcp-openapi

Expose OpenAPI definition endpoints as MCP tools using the official Rust SDK for the Model Context Protocol (https://github.com/modelcontextprotocol/rust-sdk)

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https://github.com/clickermonkey/rez

REST (easy) framework in Go with out of the box OpenAPI generation, validation, generics, and much more

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https://github.com/mrtnvh/things-you-can-do-with-an-openapi-mocking-server

Some examples of things you can do in a front end project with Prism, an OpenAPI mocking server

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https://github.com/adambien/quarkus_vs_war

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https://github.com/cangokceaslan/express-swagger-producer

This repository contains the source codes from npm package: express-swagger-producer | express-swagger-producer is TypeScript module that supports generating Swagger Api Documentation File with comments

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https://github.com/eulemitkeule/streetview-bingo

Web application assisting with playing games of Streetview Bingo.

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https://github.com/gueff/mymvc_module_openapi

OpenAPI module for myMVC

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https://github.com/caohanyang/rest_openapi

Convert existing REST html documentations into standard Open API (OAI, Swagger)

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https://github.com/u-leslie/skitt_be

Skitt Backend

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https://github.com/joanroig/candlesticks-api

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https://github.com/python-jsonschema/referencing-http

Wrap your referencing registries in an HTTP API (but not yet, as this repository is brand new!)

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https://github.com/vymalo/api-watcher-ui

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https://github.com/zapotinschii/zod-build-json-schemas

Wrapper around zod-to-json-schema, that makes it easier to use it with Fastify & OpenAPI.

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https://github.com/oliviagallucci/csec490

🧢➡️🎓

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https://github.com/arkodeepsen/openapi-gen-wrapper

A Python tool for generating OpenAPI specs

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https://github.com/sebastian4j/thorntail-demo

microprofile utilizando thorntail: metrics + health + openapi // TODO: hystrix ribbon zulu eureka JWT

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https://github.com/ssukienn/nestjs-swagger-api-spec

Decorator for aggregating all your @nestjs/swagger decorators.

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https://github.com/wiremock/spec

WireMock Specifications

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https://github.com/alexwohlbruck/nestjs-starter

Generic starter project with Nest.js for SAAS apps

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https://github.com/dev-openapi/protocol

国内开放平台接口协议，存放protobuf文件

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Open ITVHub and ITV Mercury API SDK

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https://github.com/weizhenye/bangumi-restful-api

この Bangumi は RESTful API だけです

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https://github.com/giis-uniovi/tdrules-st-tdg

Test Data Generation for APIs (TDG): System and Integration Tests

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https://github.com/chenhb23/gitee-db

免费的增删改查数据库😏。可在静态页面上直接修改数据库数据，免去服务器环节的费用。可跨域、响应速度快、ts 编写，有完整的接口类型提示!

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https://github.com/differui/oas-typegen

Generate JSDoc/TS/DTS type definitions from OpenAPI document(V2).

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https://github.com/ditschedev/swag-ts

swag-ts is a simple and fast code generator written in Go that creates typescript interfaces and enums for your openapi specification.

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https://github.com/weaponsforge/apidocs-swagger-ui

Testing using swagger ui for api documentation

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https://github.com/christianjtr/express-api-mongodb-docker-jest-supertest

API RESTFul implementation to put into practice concepts like dockerization, e2e tests, swagger documentation, and others.

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

openapi(swagger) spec generator

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https://github.com/walkersumida/go-api-server

API Server (ogen + ent + golang-migrate + postgres)

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https://github.com/t-huyeng/openapi-viewer

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https://github.com/almazrafi/swaggerkit

Swifty OpenAPI (Swagger) spec parser

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https://github.com/cloudstek/swagger-ui-preview

Easy way to fire up swagger-ui and preview your swag

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https://github.com/ingrammicro-xvantage/xi-sdk-openapispec

Ingram Micro - Xvantage Integration Open API Specification

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https://github.com/chhorz/oas-generator

Build-Time generation of OpenAPI specification files

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https://github.com/linabutler/ploidy

A Rust OpenAPI code generator that supports polymorphic schemas.

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https://github.com/oapicf/openapi-ipify

OpenAPI v3 specification and a set of generated API clients for ipify

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https://github.com/readmeio/openapi-workshop

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https://github.com/ciscodevnet/openapi_demo

OpenAPI demos

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https://github.com/guardrail-dev/guardrail-maven-plugin

Principled code generation from OpenAPI specifications

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https://github.com/noflo/noflo-swagger-client

Generate NoFlo components for accessing a Swagger/OpenAPI service

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https://github.com/waldekmastykarz/dev-proxy-aspire

Use Dev Proxy extensions for .NET Aspire to seamlessly integrate Dev Proxy into your distributed applications.

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https://github.com/kumuluz/kumuluzee-openapi-mp

KumuluzEE OpenAPI MicroProfile project provides powerful tools to incorporate the OpenAPI 3 specification to your microservices in a standardized way.

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https://github.com/seven-io/api-schemes

Official API schemes for seven.io.

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https://github.com/questionlp/api.wwdt.me_v2

Wait Wait Don't Tell Me! Stats API Version 2

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https://github.com/zeplin/openapi

An OpenAPI description for the Zeplin API

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

(TEMPLATE, Clone this repo to get started) Example of a Speakeasy Managed SDK

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

stripe client, generated from the OpenAPI spec.

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https://github.com/jayvirrathi/node-mongodb-rest-api

REST API with Node.js, MongoDB,JWT,PM2

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https://github.com/larsbergqvist/police-events

A .NET 8 + Angular solution for working with police event data from the Open API of the Swedish Police

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https://github.com/alexliesenfeld/go-swagger-ui

Swagger UI for Go web applications

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https://github.com/rapter1990/couriertracking

Case Study - Courier Tracking (Kotlin, Spring Boot, Mapstruct, JUnit Tests, Integration Tests, Docker, CI/CD - Github Actions, Gradle)

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https://github.com/wazedkhan/recipe-app

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https://github.com/reprezen/rapidml-readyapi-plugin

RAPID-ML Plugin for Ready! API

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https://github.com/i2bskn/schema_serializer

SchemaSerializer is provide serialization from schema definition to JSON.

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[SpringBoot] OpenAPI와 통신하여 SpringBoot 서버 개발 (feat URLConnection, Jackson)

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https://github.com/openxapi/openxapi

OpenAPI and AsyncAPI specifications for cryptocurrency exchanges and DeFi protocols

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https://github.com/oapicf/pinterest-sdk

A set of Pinterest SDK in multiple languages generated from Open API specification

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https://github.com/govlt/national-boundaries-api

National Boundaries and Addresses API of Lithuania

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https://github.com/yeonjulee1005/dewdew_v5

듀듀의 포트폴리오 입니다

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https://github.com/laviprog/pastes

PASTES is a project for creating and viewing posts, such as articles, tutorials, or notes, with the option to attach files.

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https://github.com/forticheprod/quiet-stroll

A service to deliver basic function about the file system

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https://github.com/rubyhcm/demo-swagger

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https://github.com/mauricio-dolinski/financeiro-api

API Gerenciamento Financeiro (Back-end) - Tecnologias: Quarkus, Hibernate, MySQL, Java

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https://github.com/linx-software/postman_to_production

How to move your OpenAPI specification to a live, hosted API. This is a guide to help users build and deploy a live API using only 2 tools; Linx, a low-code platform and Postman.

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https://github.com/dunnl/nena-openapi-docs

HTML documentation for the OpenAPI specifications published by the National Emergency Number Association

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https://github.com/cmwylie19/node-rest-service

NodeJS Rest Service with TypeScript

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https://github.com/jamalsoueidan/booking-api

An Azure Functions application that contains all the booking APIs

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https://github.com/mockoon/playground

Mockoon's playground is a ready-to-use mock API for all your prototyping needs: fake JSON data, JSON placeholders, realistic CRUD API mock, etc. It is also a good way to discover Mockoon's features.

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