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: 2026-03-25 00:22:16 UTC
- JSON Representation
https://github.com/timakro/apispec-oneofschema
Plugin for apispec providing support for Marshmallow-OneOfSchema schemas
apispec marshmallow openapi polymorphsim swagger
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https://github.com/avanov/openapi-type
OpenAPI represented as a Python type. Use it to parse specifications written in JSON and YAML formats.
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https://github.com/freshcells/graphql-rest-converter
Create OpenAPI-compatible HTTP APIs based on annotated GraphQL operations
Last synced: 01 Feb 2026
https://github.com/vaso991/koa-router-zod-swagger
Koa2 validator and swagger generator.
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Last synced: 06 Mar 2026
https://github.com/vblagoje/openapi-service-client
Enables LLM integration with OpenAPI-defined services through function-calling JSON
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https://github.com/asseco-voice/laravel-open-api
OpenAPI 3.0. generator for Laravel 8
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https://github.com/optimizory/vrest-ng
vREST NG - Zero code API test automation solution
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https://github.com/cdimascio/express-openapi-validator-example
simple openapi validation examplewith express-openapi-validator
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https://github.com/flipstone/json-fleece
Extensible JSON Schemas for Haskell
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https://github.com/fairfield-programming/openlist
🦋 The definitive list of open-source, source-available, and commercial licenses.
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https://github.com/ivan-borovets/fastapi-error-map
Elegant per-endpoint error handling for FastAPI that keeps OpenAPI in sync
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https://github.com/beehiiv/typescript-sdk
TypeScript SDK for the Beehiiv API
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https://github.com/susmita-dey/codezilla
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https://github.com/maartenvanvliet/striped
Library to interface with the Stripe Api.
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https://github.com/finbourne/lusid-sdk-python
Python SDK for LUSID by FINBOURNE, a bi-temporal investment management data platform with portfolio accounting capabilities.
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https://github.com/codewithpraveen/openapi-specification
OpenAPI (Swagger) Specification for Software Developers, a guide to learning OpenAPI Specification for highly productive API design, documentation, development, & testing.
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https://github.com/novasush/fastapi-nginx-unit
Deploying an Asynchronous FastAPI on NGINX Unit
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https://github.com/markruler/swage
OpenAPI Specification v2.0 to Excel
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https://github.com/gregswindle/eslint-plugin-swagger
An extensible linter with semantic validations for Swagger specifications.
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https://github.com/webrpc/gen-openapi
webrpc OpenAPI 3.x (Swagger) generator
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https://github.com/0xsirsaif/frappe-api
FastAPI for Frappe
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https://github.com/networknt/model-config
A repository contains all model definition and light-codegen config for different frameworks
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https://github.com/scalar/sandbox
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https://github.com/dilanx/redark
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https://github.com/daocloud/daocloud-api-docs
DaoCloud OpenAPI docs
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https://github.com/zehuangzhang/idmos
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https://github.com/pierre-emmanuelJ/open-alldebrid
Alldebrid OpenAPI based Golang client wrapper
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https://github.com/zuplo-samples/db2openapi
Generate an OpenAPI/Swagger specification from your SQL database
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https://github.com/reprezen/genflow
A unified framework for API code generators that work with OpenAPI, RAPID-ML and other description languages.
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Alldebrid OpenAPI based Golang client wrapper
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https://github.com/jakubka/swashbuckle-nodatime
Easily configure Swashbuckle to generate correct documentation for NodaTime types.
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https://github.com/hellosign/dropbox-sign-python
Official Python SDK for the Dropbox Sign API
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https://github.com/bpedro/postman-openapi-sync
Postman OpenAPI sync makes sure that your local OpenAPI spec is in sync with Postman.
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https://github.com/up9inc/oas-diff
OAS 3.1 Validation and Diff CLI Tool
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https://github.com/bfanger/swagger-explained
Interactive documentation of the swagger.json
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https://github.com/osomepteltd/openapi-ts-sdk
Osome TypeScript SDK Generator
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https://github.com/mchangrh/sb-openapi
SponsorBlock API in Swagger/ OpenAPI
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https://github.com/u2d-ai/msasdk
FastAPI Microservices Architecture SDK - As Basis for multiple services in a platform/system
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https://github.com/imranr98/backdraft
Node.js, Express, and PostgreSQL based web server with simple user authentication, to be used as a template or starting off point for backend projects.
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Last synced: 14 May 2025
https://github.com/pasan1/spring-boot-3-with-spring-security-and-swagger-ui
Spring Boot 3 project with Spring Security and Swagger UI integrated (with OpenAPI 3)
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Last synced: 30 Apr 2025
https://github.com/nutrixpos/pos
The next gen free open source restaurant management system
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Last synced: 14 Mar 2026
https://github.com/wantedly/open_api
Provide PORO and serializers for OpenAPI v3.0.1
Last synced: 12 Apr 2025
https://github.com/armsnyder/openapi-language-server
OpenAPI language server for LSP compatible code editors
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Last synced: 11 Apr 2025
https://github.com/rubrikinc/api-documentation
API documentation for the Rubrik Cloud Data Management (CDM) platform
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Last synced: 17 Jun 2025
https://github.com/swaggest/swac
🤖 OpenAPI/Swagger client generator for PHP, Go and JavaScript (ES5)
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Last synced: 22 Apr 2025
https://github.com/oliveira-michel/jhulis
Sistema (lib + REST APIs) para validação de boas práticas na construção de contratos de API em OpenAPI Specification.
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https://github.com/paddlehq/paddle-openapi
An OpenAPI description for the Paddle API.
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https://github.com/getyourguide/openapi-validation-java
Build trust in your spec by validating live requests and responses against your OpenAPI spec.
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Last synced: 12 Apr 2025
https://github.com/networknt/openapi-parser
A light-weight, fast OpenAPI 3.0 parser and validator with minimum third party dependencies
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https://github.com/mmf-fe/midway-swagger
OpenAPI(Swagger)规范是一种用于描述 RESTful API 的强大定义格式。 midway-swagger 提供了声明式的 api 及参数验证
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https://github.com/apiaddicts/openapi2soapui
API to generate a SoapUI project from an OpenAPI Specification (fka Swagger Specification) Given an OpenAPI Specification, either v2 or v3, a SoapUI project is generated with the requests for each resource operation and a test suite. The response is the content of the SoapUI project in XML format to save as file and import into the SoapUI application.
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https://github.com/elixir-tesla/tesla_openapi
Experimental client generator from OpenAPI spec.
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https://github.com/nextcloud/openapi-extractor
A tool for extracting OpenAPI specifications from Nextcloud source code
Last synced: 19 Oct 2025
https://github.com/microsoft/kiota-cli-commons
Common set of commands for CLI client generation
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https://github.com/speakeasy-api/developer-docs
This documentation is open source. We welcome feedback, suggestions, and PRs
api docs mcp openapi speakeasy-api
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https://github.com/muehmar/gradle-openapi-schema
Generate schema sources for Java from an OpenAPI 3.0.x or 3.1.x specification.
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https://github.com/dreamshive/open-swagger
Modern Swagger/OpenAPI integration for AdonisJS v6 with Scalar UI
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https://github.com/sigpwned/openapi-generator-maven-plugin-template-customization-example
An example Maven project that uses the OpenAPI Generator Maven plugin with template customization to generate an API model and server
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Last synced: 10 Aug 2025
https://github.com/microsoft/kiota-authentication-azure-go
Kiota authentication provider implementation with Azure Identity
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Last synced: 03 Mar 2026
https://github.com/kevinoid/swagger-spec-validator
Validate an OpenAPI/Swagger API specification using the swagger.io online validator.
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Last synced: 07 Oct 2025
https://github.com/januarylabs/sdk-it
SDK-IT generates type-safe client SDKs from OpenAPI specifications and creates OpenAPI specs from TypeScript code.
Last synced: 25 Oct 2025
https://github.com/stcarrez/swagger-ada-todo
Simple todo list server with OpenAPI
Last synced: 12 Apr 2025
https://github.com/dankinsoid/SwiftOpenAPI
Swift library which can generate output compatible with OpenAPI 3.1.0
Last synced: 16 Jul 2025
https://github.com/nya1/rest-api-boilerplate
Typescript-based REST API boilerplate with full integration tests
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Last synced: 16 Mar 2025
https://github.com/synx-ai/oas3-mdx
OpenAPI Spec to Markdown
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Last synced: 12 Apr 2025
https://github.com/paloaltonetworks/docusaurus-template-openapi-docs
Docusaurus template for bootstrapping with docusaurus-openapi-docs
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Last synced: 03 May 2025
https://github.com/morriz/itsup
Lean, automated, poor man's infra for lightweight services running in docker.
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https://github.com/lepoco/openapi.client
OpenAPI Client is a toolkit that helps you create HTTP clients for external APIs based on their OpenAPI specifications. It simplifies the process of consuming and interacting with various web services.
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Last synced: 12 Apr 2025
https://github.com/dankinsoid/swiftopenapi
Swift library which can generate output compatible with OpenAPI 3.1.0
Last synced: 27 Oct 2025
https://github.com/projectsyn/lieutenant-api
The Project Syn Kubernetes Cluster and Tenants Inventory API
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https://github.com/postman-open-technologies/openapi-linter
An open source implementation of Spectral for applying linting rules to an OpenAPI which can be deployed to AWS, Azure, and Heroku.
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Last synced: 08 Mar 2026
https://github.com/andreugallofre/foodlord
🥑 Calories estimation using CV built in HackCU V
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https://github.com/freb97/discofetch
🪩 The fetch client that types itself
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Last synced: 20 Jan 2026
https://github.com/elasticemail/elasticemail-python
ElasticEmail - the Python library for the Elastic Email REST API
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Last synced: 17 Mar 2025
https://github.com/straw-hat-team/nodejs-monorepo
Monorepo for the open-source packages
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Last synced: 10 Mar 2026
https://github.com/dermanomann/openapi-verifier
Verify JSON (api response) against OpenAPI specification.
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Last synced: 22 Mar 2025
https://github.com/simplify-framework/simplify
Simplify Framework (JavaScript) SDK help developers to provision runtime code as a container or lambda, deploy code in the AWS Cloud or Kubernetes. Using your own, pre-defined, tailored, customized, well-written code to deliver project within itself (True-DevOps).
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Last synced: 09 Apr 2025
https://github.com/felixarpa/unstuckoverflow
🤷♀️ Chrome ext to help devs built in HackTheBurgh V
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Last synced: 14 Mar 2025
https://github.com/valgene/valgene-cli
Multi language validation code and DTO generator from OpenAPI specification.
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Last synced: 23 Oct 2025
https://github.com/apiaddicts/sonar-openapi
Evaluation engine for OpenAPI/Swagger API definitions in SonarQube
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Last synced: 11 Apr 2025
https://github.com/mrmoeinm/aspnetcore.rapidoc
Middleware to expose an embedded version of the RapiDoc from an ASP.NET Core application
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https://github.com/simioni/nest-standard-response
Standardized and configurable API responses for NestJS
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https://github.com/trivedi-khushi/openapi-sample-library
Curated library of 20+ real-world API examples with request/response schemas and CI automation for docs generation
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https://github.com/jaxelr/nancy.metadata.openapi
Open Api Spec library for NancyFx
Last synced: 03 Jul 2025
https://github.com/sap/openapi-specification
The SAP's extension to OpenAPI Specification defines a standard for describing HTTP APIs at SAP.
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https://github.com/namuan/fuzzy-swagger
API fuzz testing generator using swagger document.
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