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: 2026-07-05 00:18:41 UTC
JSON Representation

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

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

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https://github.com/phaethix/api-doc-generator

AI-powered API documentation generator — describe your API in plain English, get OpenAPI specs + beautiful docs. Built with Deno + React.

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https://github.com/roymcfarland/workflow-blueprint

Workflow Blueprint is an invite-gated Next.js App Router task planning workspace with admin-issued invitations, board-based task management, notes, profile settings, Resend-backed transactional email, and a key-authenticated external API (/api/external/v1/*) that other projects under the owner's control consume.

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https://github.com/apimatic/skills

AI agent skills for APIMatic. Build, configure, and publish developer portals, generate SDKs, and optimize OpenAPI specs from Claude Code, Cursor, and Codex.

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https://github.com/layoric/exampleopenaiplugin

WIP Example OpenAi Plugin support for ServiceStack

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

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

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

OpenAPI specification for the Wavix API

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

Python client for Griptape Cloud APIs

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https://github.com/ztrehagem/openapi-to-fastify-schema

Generate schema objects for Fastify from OpenAPI documents

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https://github.com/openapi-processor/openapi-processor-json

converts an openapi yaml file to an openapi.json file

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https://github.com/minericefield/smartphone-app-designers-portfolio-api-docs

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

Go library for the Free Public APIs API. The Free Public APIs API provides up-to-date information on every free public API listed on freepublicapis.com. Perfect for developers, students and hobbyists. It is limited to 1000 requests a day, if you need more, feel free to reach out.

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https://github.com/what3words/what3words-api-docs

Host public Openapi spec and llms files for the what3words Public API

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https://github.com/romanow/aggregator-by-tags

OpenAPI aggregator by Tags

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https://github.com/debitoor/express-openapi

Express Open API

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https://github.com/davidogalo/appointmentscheduler

healthcare appointment scheduling system designed to streamline patient-doctor interactions and medical record management.

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https://github.com/bolshchikov/quiver-mcp

MCP server for Quiver API

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https://github.com/bindu-1805/list_items

This project lists items by making a request to JSON Placeholder using React.

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https://github.com/not-three/api

The !3 api, written in typescript, with the NestJS framework.

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https://github.com/otaviotscha/icarus-bot

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https://github.com/humbertodias/mn-kotlin-openapi-helloworld

Openapi through micronaut with kotlin

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https://github.com/zejnilovic/gh-openapi-preview

A Chrome extension that adds an OpenAPI Preview tab to GitHub’s file view for OpenAPI specs

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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/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/aditeyas/grow-your-x

A bot that automatically tweets (posts) on Twitter (X).

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https://github.com/osisdie/dotnet-webapi-cqrs-boilerplate

Production-ready .NET WebAPI framework (CoreFX) with MediatR (CQRS), FluentValidation, JWT auth, OpenAPI/Swagger, email notifications (MailKit), Docker multi-stage build, and xUnit testing. Multi-targets net8.0 + net10.0.

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https://github.com/gridaco/postgrest-openapi

JS postgREST OpenAPI Spec parser

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

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

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https://github.com/todofixme/openapi-showcases

How different OpenAPI generators might help to build stable REST APIs.

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https://github.com/andrecaiado/spring-boot-openapi

Spring Boot demo project that implements API documentation using OpenApi specification and API-first approach

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

tru.id client, generated from the OpenAPI spec.

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https://github.com/fern-api/action-postman-sync

A GitHub Action for updating a Postman Collection within a Workspace

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

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

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https://github.com/marioruiz/api-testing-example

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https://github.com/ntrv3390/pdfninja

Say hii to your pdf with pdfNinja

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https://github.com/pixxiti/oax

Open API Spec validation and client generation tooling for Typescript

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

Go library for the Remote Jobs API/RSS Feed. Discover and integrate a diverse range of remote job listings with Jobicy's public API. This API offers the latest remote job opportunities across various industries and regions, making it a valuable resource for developers and businesses looking to enhance their job feed platforms.

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https://github.com/skuong/rclone-rc-api-docs

Easy-to-read Rclone RC API docs using Scalar

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https://github.com/impulse-sw/impulse-kit

Web services and tools for Impulse

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https://github.com/soenneker/soenneker.coinbase.openapiclients.cdp

A Coinbase .NET client generated from their OpenAPI schema, updated daily

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https://github.com/mrtaz77/pantrypal

PantryPal is a pantry management app to keep track of pantry items by add, remove or update quantities using Next.js, MaterialUI and Firebase

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https://github.com/met-dev/gamesellingproject

Game Sales Project Backend Side. Tech Stack= ASP.Net, EntityFramework, Code First

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https://github.com/ramanks19/the-complete-spring-boot-development-bootcamp

Contains workbook and practice exercise of the Udemy course - The Complete Spring Boot Development Bootcamp (by Learn The Part Inc.)

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https://github.com/tryagi/runway

C# SDK based on Runway OpenAPI specification

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https://github.com/mermade/api-registry

Own-label API registry which powers APIs.guru

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https://github.com/toliyansky/openapi-spring-generator-example

Example for dev.to article

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https://github.com/aaryanpour/api-schema-endpoint-counter

A simple offline utility website to count endpoints in different (OpenAPI, Postman, GraphQL) schemas of different kinds (JSON, YAML, DSL).

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

Controle de Gastos Pessoais - MVP Puc RIO

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https://github.com/abdallahsaber065/openapi-tester-frontend

A clean, user-friendly frontend application for testing any OpenAPI-compliant API dynamically. This tool loads your API specification from OpenAPI JSON files or URLs and provides an intuitive interface for testing all endpoints without needing external tools like Postman.

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https://github.com/soenneker/soenneker.n8n.openapiclient

A .NET client generated from the N8N OpenAPI schema, updated daily

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https://github.com/thalida/openapi-docs-viewer

Display interactive OpenAPI schema documentation in VSCode

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https://github.com/vivek92503/weather-app

A weather app showing current conditions and forecasts using OpenWeatherMap API with location detection and temperature unit toggle.

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Last synced: 09 May 2026

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

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

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

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

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

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

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Last synced: 09 May 2026

https://github.com/axel7083/electron-vite-react-openapi-generator

electron template using openapi-generator for IPCs communication

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

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

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Last synced: 09 May 2026

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

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

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

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

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Last synced: 01 Jun 2026

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

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

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Last synced: 14 May 2026

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

A Stripe .NET client generated from their OpenAPI schema, updated daily

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Last synced: 02 Jun 2026

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

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

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Last synced: 15 May 2026

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

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

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

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

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https://github.com/jeremi/registry-docs

Canonical documentation website for the registry project family.

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Last synced: 29 Jun 2026

https://github.com/patrykbaszak/extended-api-doc-bundle

An extension for nelmio/api-doc-bundle that improves the sorting of endpoints by tags and provides minor stylistic corrections to the original Nelmio view.

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Last synced: 10 Apr 2026

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

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

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Last synced: 09 May 2026

https://github.com/ivan-montes/solar-fleet

An API REST implemented using Quarkus, Maven, Java, and MongoDB, mainly.

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https://github.com/vrv501/simple-api

Simple REST based API

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https://github.com/ankitboghra/openapi-watchgod-merger

Merge OpenAPI and Watchgod responses to track latest status of a deposit/withdraw transaction on Ethereum Chain and Polygon Chain.

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Last synced: 09 May 2026

https://github.com/charconstpointer/ihateannotations

Example combining buf, Protobuf, gRPC, gRPC Gateway and OpenAPI

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https://github.com/constellation39/openapi-to-mcp

`openapi-to-mcp` is a Go language implementation that converts OpenAPI specifications into MCP (Model Context Protocol) tools.

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Last synced: 22 Jul 2025

https://github.com/swagger-akka-http/swagger-scala3-enum-module

Scala3 enum support for swagger

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Last synced: 20 Jan 2026

https://github.com/pccomponentes/documentation-bundle

The documentation bundle manages the required routes and templates in order to show documentation both in OpenApi and AsyncApi formats.

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Last synced: 09 May 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/libninjacom/blend-rs

blend client, generated from the OpenAPI spec.

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https://github.com/patricks-js/capybara-hub

Capybara Hub - A simple hotel management system.

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https://github.com/artmann/youtube-music-video-api

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https://github.com/ueno-toshihiro/react-use-openapi

OpenAPI仕様のjson schemaからOrvalで型、カスタムフックス、モックAPIを作成しReactで表示する

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Last synced: 05 Jan 2026

https://github.com/nikita-volkov/modeliero

Swiss army knife for model code-generation (in beta)

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https://github.com/praveen0777/multimodal-ai-assistant-with-face-recognition-emotion-analysis-gpt-based-and-object-detection-yolov8

The project introduces Maya, Multimodal AI Assistant with Face Recognition, Emotion Analysis, Voice-Controlled Interaction, GPT-Based Dialogue, and Real-Time Object Detection Using YOLOv8

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https://github.com/subzeroid/hikerapi-mcp

MCP server for HikerAPI — 105+ Instagram API tools auto-generated from the OpenAPI spec. Use from Claude Code, Claude Desktop, Cursor, OpenAI Codex, Zed, Windsurf.

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https://github.com/subzeroid/lamatok-mcp

MCP server for LamaTok — TikTok API tools auto-generated from the OpenAPI spec. Use from Claude Code, Claude Desktop, Cursor, OpenAI Codex, Zed, Windsurf.

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https://github.com/thejoltjoker/picterest

Full-stack app integrating Google Custom Search and Auth0 for user login, image search, and saving favorites. First assignment of FSU23D Integration course.

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https://github.com/iqbalmind/jurnal-api-example

A collection of example integrations with the Mekari Jurnal Open API using different Code & frameworks. This repository aims to help developers quickly understand and implement Jurnal API integrations across various environments.

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

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

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https://github.com/alejandrehl/tcit-posts-backend

RESTful API for blog post management built with NestJS, TypeScript, and PostgreSQL. Includes modular architecture, robust validation, OpenAPI (Swagger) documentation, and Docker support.

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https://github.com/lornajane/apitapviz

Simple visualisation of OpenAPI Arazzo files as Markdown or mermaidjs. (Mirror of the main apitapviz repo)

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https://github.com/kronyxgames/lesyria-launcher

The Official Lesyria Launcher App Electron

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https://github.com/flkt-crnpio/fastapi-sandbox

Pruebas para crear la documentacion de una API bajo los protocolos de OpenAPI utilizando el framework de FastAPI

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https://github.com/swooby/openai-openapi-kotlin

OpenAI OpenAPI Specification - Kotlin

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https://github.com/jaqx0r/rules_oapi_codegen

Bazel rules for generating API service handlers with `oapi-codegen`.

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https://github.com/romanow/openapi-aggregator-by-tags

Concatenate multiple OpenAPI in one file with Include and exclude tags

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https://github.com/ideadapt/intellij-swagger-annotations

Intellij plugin providing editor features related to swagger and openapi annotations

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https://github.com/elnurvl/tasker

A simple task management platform, built with Laravel to demonstrate tools and techniques used in professional product development workflows

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https://github.com/ybelenko/openapi-data-mocker-interfaces

Package with OpenApiDataMocker interfaces.

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https://github.com/go-api-libs/remote-ok-jobs

Go library for the Remote OK Jobs API. Remote OK is the #1 remote-only jobs board on the web. It has over 30,000+ remote job listings, adding new ones every day. With this API, now you can build apps with our data feed which covers 80% of remote jobs on the web.

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