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/garvae/mcp-mcphub
MCP server for managing MCPHub instances through the MCPHub REST Management API
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https://github.com/ignaciogoldchluk/cuerdo
Property-based testing for Arazzo workflows
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https://github.com/moaraby/weather-app-nodejs
openAPI fetch using axios
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https://github.com/benaiad/sqlize
SQL interface for REST APIs
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https://github.com/iamgoatki/messendger_windl
Mини-приложение, реализующее функционал чата с возможностью отправки сообщений, их хранения в базе данных и создания групповых чатов.
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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/awtkns/openapi-perf-action
Github App and Action Allowing for CI/CD of OpenApi-Perf in Github
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https://github.com/gopireddy99/receipe_finder
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https://github.com/simon-gardier/inventory-flutter-dotnet-app
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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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https://github.com/libninjacom/recurly-rs
Recurly client, generated from the OpenAPI spec
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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/rebecaborges/tsc-base-api
Typescript base api using OpenApi specification rules
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https://github.com/mohamed255255/mini-order-tracker
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Public customer preview GitHub Action for Postman workspace, OpenAPI spec, and collection bootstrap
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Customize and override OpenAPI schema details in FastAPI with ease
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Petstore client, generated from the OpenAPI spec
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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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Tools to manipulate Semoasa documents
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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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Custom OpenAPI generator that is used to generate swagger documentation using comments.
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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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Native Android library for Skycoin API
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TerraformでAWS Lambda (Python) & API Gateway (powered by OpenAPI) のサンプル
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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/ron96g/dev-tools
Collection of useful developer tools. Including JSON/Yaml Formatting, OpenAPI/Swagger Validation
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https://github.com/clarius/azure.functions.openapi
Official docs site for https://github.com/devlooped/Azure.Functions.OpenApi
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Twilio client, generated from the OpenAPI spec, with love from the team at Libninja
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Type-safe API client using OpenAPI-like schema
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Official TypeScript SDK for the Leadping API.
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Official Java SDK for the Leadping API.
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https://github.com/leadpingai/leadping-php
Official PHP SDK for the Leadping API.
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https://github.com/norwegian-geotechnical-institute/field-manager-python-client
The Field Manager (FM) Python client is a library designed to provide developers with programmatic access to the Field Manager API.
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https://github.com/apskhem/linz
A web framework with first-class OpenAPI documentation support.
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https://github.com/deephaven/openapi-messaging
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https://github.com/trovster/docs.api.trovster.com
The documentation for the API on trovster.com. This is auto-generated using an Open API Spec.
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https://github.com/t-huyeng/thw-pegel-api
inoffizielle OpenAPI der API des Mobilen-Pegels (THW)
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https://github.com/sebastianromero/bsale-openapi
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https://github.com/lovasoa/jsonjoy-builder
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https://github.com/jfcardoso/dio-padroes-projeto-java-spring
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https://github.com/erwanlt/openapireader
Display information about API described in an OpenAPI documention
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https://github.com/soenneker/soenneker.openapi.diagnostics
A utility to diagnose openapi documents for client generation and other problems
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https://github.com/libninjacom/instance-rs
instance client, generated from the OpenAPI spec
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https://github.com/fugerit-org/yaml-doc-maven-plugin
Simple maven plugin for the yaml-doc-tool project
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https://github.com/casantosmu/openapi-scan
CLI tool for validating OpenAPI definitions
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Java Starter Template
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https://github.com/vernoxvernax/willhaben-api
WIP Willhaben API Documentation
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Reusable OpenAPI components in the health care domain
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https://github.com/roymcfarland/llm-workbench
Open-source, model-agnostic control plane for LLM agents — tamper-evident, human-gated, replayable run bundles with full trace history, model I/O, and cost telemetry. TypeScript · React · MCP · OpenAPI. MIT, published on npm.
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https://github.com/opifexm/sixcitiesserver
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https://github.com/inyourtime/fastify-openapi-serve
Fastify plugin that serve OpenAPI specifications from multiple files as JSON or YAML
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https://github.com/vinitshahdeo/newrelic-to-postman
Convert New Relic transaction to Open API definition or Postman collection
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https://github.com/mako-framework/open-api
Generate routes based on OpenAPI specifications and OpenAPI specifications from code.
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https://github.com/rihib/www-rihib-dev
[WIP] My Website
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https://github.com/selfagency/vsc-coredx-api
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https://github.com/vertilia/router
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https://github.com/soenneker/soenneker.radarr.openapiclientutil
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https://github.com/youssefgamalmohamed/observability-spring-boot
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:shopping_cart: Grocery Management System.
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https://github.com/iota-uz/eskiz
IOTA Go client for the Eskiz SMS API — send SMS messages worldwide from your Go applications. Generated with OpenAPI Generator. Includes support for token-based auth, server configuration, and handy utility helpers
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https://github.com/lidizz/studyhub-backend
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https://github.com/abdullah00001/elevancenet_docs
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