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/nexys-system/postman-openapi-ui

generate Open API from Postman collection

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https://github.com/soenneker/soenneker.notion.httpclients

A thread-safe singleton HttpClient for Notion's OpenAPI integration.

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https://github.com/soenneker/soenneker.dropboxsign.httpclients

A thread-safe singleton HttpClient for DropboxSign's OpenAPI integration.

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https://github.com/instantan/web

Build robust web applications with pure Go. No external dependencies, just the power of the standard library.

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https://github.com/soenneker/soenneker.unified.httpclients

A thread-safe singleton HttpClient for Unified's OpenAPI integration.

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https://github.com/borolgs/axum-examples

Examples of using the Axum web framework

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https://github.com/nebil175/lcu_dumper

🔍 Discover and extract League Client Update data easily with LCU Dumper, a fast, cross-platform CLI that outputs selected API endpoints to JSON files.

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https://github.com/tpdlshdmlrkfmcla/seoul_toilet

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https://github.com/speakeasy-sdks/template-speakeasy-bar

A template for the Speakeasy Bar starter SDK.

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https://github.com/drewlakee/json-object-openapi-schema

A Kotlin library for converting Json-object into OpenAPI Schema

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https://github.com/codewiththomas/fom-project-server

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https://github.com/k5ki/oapigen-poc

how to reuse the model for each endpoint

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https://github.com/astron-collection/astron-mail

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https://github.com/ferror/openapi-coverage

Symfony Command that calculates Open API documentation coverage

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https://github.com/leozqin/laridae

A registry and proxy server for agentic tool-calling

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https://github.com/go-api-libs/notion

Go library for the notion.

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https://github.com/soenneker/soenneker.cloudinary.openapiclient

A .NET client generated from the Cloudinary OpenAPI schema, updated daily

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https://github.com/go-api-libs/freepublicapis

Go library for the Free Public APIs API. The Free Public APIs API provides up-to-date information on every free public API listed on freepublicapis.com. Perfect for developers, students and hobbyists. It is limited to 1000 requests a day, if you need more, feel free to reach out.

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https://github.com/bolshchikov/quiver-mcp

MCP server for Quiver API

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https://github.com/otaviotscha/icarus-bot

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https://github.com/aditeyas/grow-your-x

A bot that automatically tweets (posts) on Twitter (X).

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https://github.com/todofixme/openapi-showcases

How different OpenAPI generators might help to build stable REST APIs.

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https://github.com/marioruiz/api-testing-example

Example using RSpec and nice_http to test REST APIs. (Uber API and Reqres API)

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https://github.com/go-api-libs/jobicy

Go library for the Remote Jobs API/RSS Feed. Discover and integrate a diverse range of remote job listings with Jobicy's public API. This API offers the latest remote job opportunities across various industries and regions, making it a valuable resource for developers and businesses looking to enhance their job feed platforms.

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https://github.com/mrtaz77/pantrypal

PantryPal is a pantry management app to keep track of pantry items by add, remove or update quantities using Next.js, MaterialUI and Firebase

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https://github.com/tryagi/runway

C# SDK based on Runway OpenAPI specification

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https://github.com/soenneker/soenneker.cohere.openapiclient

A .NET client generated from the Cohere AI OpenAPI schema, updated daily

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https://github.com/soenneker/soenneker.replicate.openapiclient

A .NET client generated from the Replicate OpenAPI schema, updated daily

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https://github.com/soenneker/soenneker.stripe.openapiclient

A Stripe .NET client generated from their OpenAPI schema, updated daily

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https://github.com/soenneker/soenneker.openai.openapiclient

A .NET client generated from the OpenAI OpenAPI schema, updated daily

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https://github.com/ankitboghra/openapi-watchgod-merger

Merge OpenAPI and Watchgod responses to track latest status of a deposit/withdraw transaction on Ethereum Chain and Polygon Chain.

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https://github.com/lornajane/apitapviz

Simple visualisation of OpenAPI Arazzo files as Markdown or mermaidjs. (Mirror of the main apitapviz repo)

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https://github.com/jaqx0r/rules_oapi_codegen

Bazel rules for generating API service handlers with `oapi-codegen`.

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https://github.com/go-api-libs/remote-ok-jobs

Go library for the Remote OK Jobs API. Remote OK is the #1 remote-only jobs board on the web. It has over 30,000+ remote job listings, adding new ones every day. With this API, now you can build apps with our data feed which covers 80% of remote jobs on the web.

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