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: 2026-07-02 00:22:14 UTC
JSON Representation

https://github.com/OpenChargingCloud/OCPIExplorerWebApp

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Where OpenAPI meets KarateDSL Server Side Features for REST API mocking.

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Integrate Swagger UI and Editor into Laravel

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OpenAPI validation middleware for Guzzle, adapting league/openapi-psr7-validator

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Turn SpringDoc OpenAPI into production-ready MCP tools for Spring Boot: discovery, validation, workflows, and guardrails.

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An example Node Client that connects and logs in

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This project combines the power of Spring Boot with modern technologies to build robust, secure, and highly performant RESTful APIs. Explore our implementations to learn about database management, authentication, Dockerization, CI/CD, testing, and more.

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A tool for automatically converting OpenAPI into Model Context Protocol (MCP) Server instance

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https://github.com/onlyphantom/revconnexion

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