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: 2026-01-22 00:18:40 UTC
JSON Representation

https://github.com/sourcemeta/learnjsonschema.com

Reference documentation for JSON Schema. Includes detailed information about each keyword and vocabulary, alongside examples

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Last synced: 12 Apr 2025

https://github.com/kota65535/openapi-merger

Merges multiple OpenAPI document files into a single file.

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Last synced: 06 Apr 2025

https://github.com/omermecitoglu/next-openapi-route-handler

a Next.js plugin to generate OpenAPI documentation from route handlers

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Last synced: 05 May 2025

https://github.com/wrtnlabs/openai-function-schema

OpenAI Function Call Schema Composer and Executor from OpenAPI (Swagger) Document.

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Last synced: 11 Apr 2025

https://github.com/nfroidure/whook

Build strong and efficient REST web services.

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Last synced: 07 Apr 2025

https://github.com/the-codegen-project/cli

Your one stop boilerplate killer for any standard!

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https://github.com/apis-guru/unofficial_openapi_specs

Unofficial OpenAPI/Swagger specs for popular APIs

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Last synced: 05 Oct 2025

https://github.com/curvednebula/apibake-js

Convert OpenAPI to PDF.

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https://github.com/ghostbuster91/sttp-openapi-generator

Generate sttp client from openapi specification with ease!

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https://github.com/eventuallyconsultant/codegenr

Fast handlebars templates based code generator, ingesting swagger/openapi and other json/yaml documents with $refs, or graphql schema, outputs whatever you template

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https://github.com/spiralmoon/maplestory.openapi

🍁 MapleStory Nexon Open API Client Library for TypeScript, Java, C#, Python. KMS, MSEA is now available!🍁

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https://github.com/ogen-go/example

Sample project with client, server and OpenTelemetry integration

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https://github.com/DataDog/datadog-api-client-ruby

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https://github.com/rapter1990/simplebanking

Simple Banking App (Spring Boot, Gradle, JUnit, Integration Test, Postgresql, Prometheus, Grafana, Github Actions, Postman)

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https://github.com/yiisoft/yii-swagger

Swagger integration for Yii

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https://github.com/kymmt90/schema_conformist

An automatic JSON response validator for testing in Rails

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https://github.com/gotomicro/eapi

一个通过分析 AST 生成 Swagger 文档的工具

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https://github.com/janbuchar/payload-oapi

A Payload CMS plugin for OpenAPI (3.0, 3.1) specification generation

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https://github.com/furkan-guvenc/crud_routers

Automatically create crud routes for your favorite api server and orm

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https://github.com/carminepo2/openapi-ts-rest

A simple tool to generate a ts-rest contract (with zod validation) from an OpenAPI 3.0/3.1 specification.

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Last synced: 07 Oct 2025

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

A code generation tool for openapi 3 / 3.1 specifications written in typescript, primarily aimed at generating typescript clients and server stubs. Other target languages may be added in future.

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https://github.com/go-andiamo/chioas

Go package for defining Chi apis (with OpenAPI generated specs)

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https://github.com/penx/openapi-mock

Start a mock server from an OpenAPI/Swagger spec file

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https://github.com/outofcoffee/vertx-oas

Generates a Swagger/OpenAPI specification from a Vert.x Web Router.

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https://github.com/taojy123/eave

优雅的接口文档制作工具 | A Restful Api Document Builder For Pythonista

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https://github.com/anhthang/soap-converter

Instantly convert SOAP/WSDL definitions to REST API specifications for use with Postman, OpenAPI/Swagger, and other API development tools.

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Last synced: 11 Apr 2025

https://github.com/tomi-vanek/microts

Microservice code generator: from OpenAPI (Swagger) REST API specification to TypeScript project with Docker.

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Last synced: 16 Mar 2025

https://github.com/avicennajr/shellmate

Your very own terminal AI assisstant 🤖

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https://github.com/leon3s/ntex-rest-api-example

Example on how to create a REST API in Rust with ntex and utoipa

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https://github.com/dzakh/rescript-json-schema

📄 Typesafe JSON schema for ReScript

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https://github.com/mastercard/oauth1-signer-python

Python library for generating a Mastercard API compliant OAuth signature.

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https://github.com/souhailas/vissoft2023

Interactively exploring API structural changes and versioning consistency

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https://github.com/wolfadex/elm-open-api-cli

A CLI tool for generating Elm modules from Open API specs.

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Last synced: 22 Jun 2025

https://github.com/lispyclouds/climate

The sidekick for your CLIs powered by OpenAPI

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https://github.com/aleksandryackovlev/openapi-mock-express-middleware

Generates express mock-servers from OpenAPI specs

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Last synced: 13 Apr 2025

https://github.com/xc0dex/apiweaver

A powerful library for customizing OpenAPI documents generated by the built-in generator from Microsoft.AspNetCore.OpenApi in .NET 9

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https://github.com/alovajs/devtools

Editor devtools for alova.js

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https://github.com/xavierchow/vim-swagger-preview

A Vim plugin for previewing swagger/openAPI spec in Chrome with swagger-ui.

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https://github.com/jbrooksuk/chirper

Example application that demonstrates how to document Laravel APIs using Scribe.

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Last synced: 05 May 2025

https://github.com/reprezen/semoasa

Specification Extension Metadata for OAS Annotations (Semoasa) is a machine-readable format for extensions to Swagger/OpenAPI 2.0 and 3.0 specifications.

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https://github.com/redocly/json-to-json-schema

Convert JSON examples into JSON schema (supports Swagger 2, OpenAPI 3 and 3.1)

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Last synced: 30 Jun 2025

https://github.com/long2ice/fibers

Fiber + Swagger = Fibers, a web framework dedicated to providing a FastAPI-like development experience

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https://github.com/yusuf-daglioglu/swagger_plugin_example

Example of a Swagger plugin which prints the information from custom Java annotation to Swagger HTML UI.

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https://github.com/gitbookio/public-docs

GitBook’s Documentation

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https://github.com/codecentric/reedelk-runtime

Reedelk Runtime Platform Community Edition

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https://github.com/microsoft/kiota-java

Java libraries for Kiota-generated API clients.

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Last synced: 05 May 2025

https://github.com/mastercard/client-encryption-csharp

Library for Mastercard API compliant payload encryption/decryption.

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Last synced: 11 Jun 2025

https://github.com/mastercard/oauth1-signer-csharp

Zero dependency library for generating a Mastercard API compliant OAuth signature.

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https://github.com/sahamati/account-aggregator-standards

Account Aggregator Ecosystem API Specifications and FI Schemas.

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Last synced: 08 May 2025

https://github.com/cardinalby/hureg

Huma registration extensions

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https://github.com/kritsel/tado-openapispec-v2

Community managed tado API definition (OpenAPI schema), documenting the operations in the https://my.tado.com/api/v2 tado API

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Last synced: 19 Apr 2025

https://github.com/noahdietz/oatts

DEPRECATED in favor of https://github.com/google/oatts

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Last synced: 12 Apr 2025

https://github.com/Eywek/typoa

🏗 Build OpenAPI definitions from Typescript typings

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Last synced: 06 Aug 2025

https://github.com/kong/go-apiops

Kong's Go based APIOps library

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https://github.com/neoteroi/essentials-openapi

Functions to handle OpenAPI Documentation.

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https://github.com/jaboc83/ynab-sdk-dotnetcore

YNAB API .Net Core Library https://api.youneedabudget.com

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https://github.com/mermade/openapi3-examples

Passing and failing test cases for OpenAPI 3.x validators

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https://github.com/otk-final/openapi-codegen

openapi（swagger）代码生成器

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https://github.com/rafaelcaricio/sticker

Sticker is a powerful yet boilerplate-free alternative to writing your web API.

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Last synced: 14 Jan 2026

https://github.com/anttiviljami/mock-json-schema

Simple utility to mock example objects based on JSON schema definitions

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https://github.com/chanced/openapi

an OpenAPI 3.x library for go

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https://github.com/eywek/typoa

🏗 Build OpenAPI definitions from Typescript typings

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https://github.com/erosb/kappa

OpenAPI 3.1 validator library for Java and JVM

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https://github.com/korthout/camunda-platform-rest-api

A REST API for Camunda Platform 8

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https://github.com/xrstf/kube-api.ninja

A basic website that shows the timeline of Kubernetes Core APIs

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https://github.com/surfstudio/surfgen

Powerful codegen tool for generating whatever you what from OpenAPI

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Last synced: 13 Apr 2025

https://github.com/wardvisual/engine-warvil

A comprehensive language tool.

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https://github.com/kbuntrock/openapi-maven-plugin

Generate openapi documentation for SpringMVC or JaxRS/JakartaRS projects.

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Last synced: 27 Jul 2025

https://github.com/kondohiroki/go-boilerplate

A project boilerplate to make a go application with Fiber

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Last synced: 07 May 2025

https://github.com/panacloud/cli

Panacloud Command Line Interface (CLI) uses the design-first approach for developing APIs. It generates Modern Multi-Tenant Serverless Cloud API infrastructure, mocks, stubs, tests, and stages using CDK. GraphQL schemas and OpenAPI specifications are used to implement the design-first approach.

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Last synced: 13 Apr 2025

https://github.com/fatal1ty/openapify

Framework agnostic OpenAPI Specification generation for code lovers

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Last synced: 12 Apr 2025

https://github.com/redocly/redocly-cli-cookbook

A community-created collection of configuration, plugins and techniques for getting the best from Redocly CLI in every situation.

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Last synced: 10 Oct 2025

https://github.com/avencores/openai-api-telegram-bot-public

🖤ChatGPT, DALLE-2 and Whisper Telegram Bot🖤

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Last synced: 17 Jun 2025

https://github.com/ogen-go/protoc-gen-oas

Generate OpenAPI v3 from protobuf

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Last synced: 04 Aug 2025

https://github.com/tryagi/openai

C# SDK based on official OpenAI OpenAPI specification

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Last synced: 13 May 2025

https://github.com/lulusir/clean-js-api-gen

Automatically generate request codes according to YAPI, swagger2, swagger3, openapi and other protocols

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Last synced: 14 Apr 2025

https://github.com/guardrail-dev/sbt-guardrail

Principled code generation from OpenAPI specifications

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Last synced: 01 May 2025

https://github.com/carlansley/swagger2

Loading, parsing and validating requests to HTTP services based on Swagger v2.0 documents

openapi swagger validation

Last synced: 15 Apr 2025

https://github.com/Fatal1ty/openapify

Framework agnostic OpenAPI Specification generation for code lovers

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Last synced: 28 Mar 2025

https://github.com/sap/cloud-sdk-java

Use the SAP Cloud SDK for Java to reduce development effort when building applications on SAP Business Technology Platform that communicate with SAP solutions and services such as SAP S/4HANA Cloud, SAP SuccessFactors, and many others.

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Last synced: 23 Jan 2026

https://github.com/tryagi/anthropic

C# SDK based on Anthropic OpenAPI specification

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Last synced: 13 May 2025

https://github.com/typeable/comparest

Compatibility checker for OpenAPI

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Last synced: 12 Apr 2025

https://github.com/intervenehq/parser

Open source NLA. Hosted service in private beta, signup now! Alternative to Zapier NLA

agents gpt llm openapi rag

Last synced: 06 Aug 2025

https://github.com/deepmancer/full-stack-fastapi-ftgo

Full stack, modern web application template. Using FastAPI, Vuejs, MongoDB, PostgreSQL, Redis, Metabase, Grafana, Docker, and more!

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Last synced: 11 Apr 2025

https://github.com/pontjs/pontx

OpenAPI full lifecycle management

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Last synced: 12 Apr 2025

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

The official OpenAPI 3.0 definitions for ShipEngine™

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Last synced: 09 Apr 2025

https://github.com/eikek/sbt-openapi-schema

Generate schema sources for Scala, Java and Elm from an openapi 3.0 spec.

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Last synced: 06 Nov 2025

https://github.com/tromgy/swagger-yaml-to-json-schema

Node.js CLI tool to generate JSON schema from Swagger YAML file

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

OpenAPI output generated in SQL for a PostgREST instance

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Last synced: 14 Jun 2025

https://github.com/Mermade/openapi-extract

Extract single paths/operations from OpenAPI definitions

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Last synced: 03 Apr 2025

https://github.com/mastercloudapps-projects/rest-grpc-graphql

This project aims to provide a high level analysis and comparison between several API styles

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https://github.com/liveramp/reslang

A language for describing resource-oriented APIs & turning them into Swagger or resource diagrams. Oriented around the concepts we want to expose in the APIs.

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