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: 2026-06-26 00:18:49 UTC
- JSON Representation
https://github.com/vihuvac/expressure
Expressure is a modern, opinionated boilerplate for building scalable NodeJS APIs with Express.js, TypeScript, OpenAPI, and Docker. Whether you're crafting a monolith or spinning up microservices, Expressure gives you a clean, consistent foundation with smart defaults and zero friction.
expressjs micro nodejs openapi restful-api swagger
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https://github.com/el1s7/rests
Easily generate API client's SDK โ organize and simplify API Requests โ OOP-ish way.
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https://github.com/webman-tech/swagger
[READ ONLY] Subtree split from webman-tech/components-monorepo
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https://github.com/leidenheit/itarazzo-library
Library to parse, validate and execute an Arazzo specification.
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https://github.com/sgraaf/openapi-scraper
Track changes to RESTful APIs by git scraping their OpenAPI descriptions
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https://github.com/helciodev/weather-app
A weather app that gets user location and fetches the current weather from the open weather API. The user can search up from more than 220 cities around the world, user can also choose which unit the temperature will be displayed by pressing the toggle button.
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https://github.com/vinitshahdeo/openapi-url-resolver
Resolve server URLs and extract hosts from OpenAPI 3.x and Swagger specifications.
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https://github.com/sylhare/petshop
๐ถ๐ Kotlin spring-boot project using a generated API from a swagger file
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https://github.com/bonitasoft/bonita-openapi
This repository contains the Bonita OpenAPI specification
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https://github.com/deepgram/deepgram-api-specs
Deepgram's API Specs
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https://github.com/jobinsjp/api-generator
Generate api docs while writing test case (Laravel).
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https://github.com/zhudotexe/fastlmi
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Design first approach with OpenAPI 3 for Falcon
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https://github.com/iterait/apistrap
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https://github.com/sotayamashita/openapi-mcp-server
Powerful bridge between OpenAPI specifications and AI assistants using the Model Context Protocol (MCP). Automatically converts any OpenAPI/Swagger API specification into MCP tools that can be used by AI assistants like Claude Desktop.
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https://github.com/devexps/go-micro
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https://github.com/welcomattic/openapi-enricher
Enrich an OpenAPI spec with response examples to mock it efficiently
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https://github.com/wubin1989/pullcode
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https://github.com/pe-st/apidocs
Examples and comparison of how a REST API can be documented with different technologies
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https://github.com/magisteriis/riot-games-help-to-swagger-dotnet
Converts Riot Games' native help format to Swagger and OpenAPI.
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https://github.com/eywek/oatyp
๐ Build Typescript typings from OpenAPI definitions
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https://github.com/kherp/swagger-codegen-openapi
generate code from openapi/ swagger
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https://github.com/paulvollmer/openapi-split
openapi-split is a simple commandline tool to organize an openapi (swagger) specification across multiple files
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https://github.com/birddevelper/notebookmanager
A Real World Example for Open API Restful Spring boot Application + Swagger + MySQL + Docker
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https://github.com/falcoframework/falco.openapi
OpenAPI integration for Falco.
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https://github.com/skbkontur/perl-jsonschema-validator
JSON Schema and OpenAPI data validator for Perl
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https://github.com/andostronaut/eslint-ai
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https://github.com/ltmenezes/fences
Fences is an LLM augmented OpenAPI interpreter with a visual interface to easily make requests
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https://github.com/gocodebox/lifterlms-rest
LifterLMS REST API Feature Plugin
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Schema.Org OpenAPI Catalog (GSoC 2023)
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https://github.com/ksm26/function-calling-and-data-extraction-with-llms
Master the techniques of function-calling and structured data extraction with LLMs. Learn to enhance LLM capabilities, integrate web services, and build practical applications for real-world data usability.
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https://github.com/sparkfabrik/nominatim-openapi
OpenAPI specification for OpenStreetMap Nominatim API (unofficial).
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.NET 9 Open API in ASP.NET Core
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https://github.com/lifailon/selenium-modules
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OpenAPI Specification parser for PHP 8. Supports both OAS 3.0 and 3.1.
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https://github.com/springfox/springfox-grails-demo
Sample application to demonstrate the capabilities of integrating with grails
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https://github.com/SAP-archive/hana-enterprise-search-engine
Sample application exposing SAP HANA search features as HTTP-REST services.
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https://github.com/rapter1990/foreignexchangeexample
Case Study - Openpayd Foreign Exchange Example (Spring Boot, Java 21, Docker, Maven, JUnit Test, Integration Test, In-Memory Database (H2 Database), Github Actions, Spring Open Api, Mapstruct, Spring Cache, Resillience4j (Rate Limiter))
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Toggle additionalProperties in an OpenAPI spec
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https://github.com/mimicry-tech/openapi_validator
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https://github.com/connectaman/fastapi-openapi-markdown-documentation-generator
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https://github.com/theogravity/fastify-starter-turbo-monorepo
A starter project for building an API service using Fastify v5, kysely / postgres, turbo, and pnpm with sample tests and OpenAPI endpoint / database generators to help you build quickly
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https://github.com/muniftanjim/express-joi-openapi
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https://github.com/prithivsakthiur/strangerai
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https://github.com/opvious/abaca
OpenAPI TypeScript SDK generator with strong type guarantees and minimal boilerplate
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https://github.com/nawaz1991/lua-oasvalidator
A FAST Lua module to validate the HTTP requests against the OpenAPI specifications of the REST server.
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https://github.com/mockzilla/mockzilla-portable-template
Portable OpenAPI mock server template for Mockzilla with GitHub Actions and hosted API simulations
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https://github.com/amorimjj/nestjs-redoc-try-out
NestJS-Redoc-Try-Out is an unofficial NestJS module for Redoc Try Out. It provides an easy way plugging in Redoc in a NestJS application.
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https://github.com/jcrqr/octono
๐ GitHub REST API for Deno projects
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https://github.com/badsyntax/mailinabox-api
HTTP client SDK's for the Mail-in-a-Box API.
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https://github.com/webysther/jellyfin-sdk-python
A Python SDK for Jellyfin
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https://github.com/supermodel/supermodel-cli
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https://github.com/simonkowallik/as3ninja
:octocat: AS3 Ninja is a templating and validation engine for your AS3 declarations. No matter if you prefer a CLI or Swagger REST API, AS3 Ninja has you covered!
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https://github.com/zchee/schema
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https://github.com/zchee/protoc-gen-openapi
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https://github.com/kompendium-ano/api-factom
Haskell REST client & server for Factom Open API specification
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https://github.com/numberfour/openapi-scala
An opinionated library and SBT plugin for generating Scala code from OpenAPI 3.
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https://github.com/gemyago/apigen
HTTP API Layer Generator for the Go (golang) projects
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https://github.com/stackql/stackql-azure-openapi
Generates a single OpenAPI document for each Azure Resource Manager service from a set of OpenAPI specifications sourced from Azure REST API specs
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https://github.com/hasanqq/openapi-starter
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https://github.com/open-solid/open-api-bundle
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https://github.com/nikolaydubina/openapi-inline-examples
๐ Inline OpenAPI JSON examples from filenames
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https://github.com/nunchistudio/helix
helix is a framework for building cloud-native, consistent, reliable, and high-performance (micro) services with automatic logging, tracing, observability, and event propagation across services and integrations.
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https://github.com/martinjrobins/battery-api
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https://github.com/romain-gilliotte/spectral
Capture web traffic while browsing, then let an LLM analyze it into OpenAPI specs, GraphQL schemas, and ready-to-use CLI configs with auth
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https://github.com/cugu/swagger-go-chi
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https://github.com/microfocus/swagger-ui
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https://github.com/nya1/ts-api-boilerplate
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