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: 2026-07-05 00:18:41 UTC
JSON Representation

https://github.com/rudeboyone/tarefastest

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https://github.com/yevheniidatsenko/goit-pythonweb-hw-08

📂 Hometask - FullStack Web Development with Python (FastAPI | REST API | CRUD)

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https://github.com/torand/openapi2java

Maven plugin to generate Java models and REST clients from an OpenAPI specification

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https://github.com/cubicrootxyz/workflows

Collection of commonly used GitHub workflows

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https://github.com/kopfrechner/scalar-chrome-extension

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https://github.com/seabed-labs/drip-client

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https://github.com/gopad/gopad-js

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https://github.com/letehaha/walutomat-sdk

Unofficial SDK clients for the Walutomat API v2.0.0. Walutomat is a Polish peer-to-peer currency exchange platform operated by Currency One. This SDK provides typed clients for their REST API, covering wallet management, transfers, direct FX, and the P2P market order book.

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https://github.com/aihxp/sumac

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https://github.com/trivigy/oas

Golang OpenAPI Specification definitions

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

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

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https://github.com/soenneker/soenneker.sendgrid.openapiclientutil

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https://github.com/soenneker/soenneker.cloudflare.utils.client

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https://github.com/soenneker/soenneker.workos.openapiclientutil

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

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

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

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

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

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

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

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

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https://github.com/shearichard/flask-for-redux-testing

Flask based RESTFUL API to use for testing Redux Toolkit against.

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A thread-safe utility for obtaining Bandwidth's OpenApiClient singleton.

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https://github.com/oxhq/oxcribe

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

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https://github.com/soenneker/soenneker.calcom.openapiclientutil

A thread-safe utility for obtaining CalCom's OpenApiClient singleton.

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https://github.com/soenneker/soenneker.intercom.openapiclientutil

A thread-safe utility for obtaining Intercom's OpenApiClient singleton.

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https://github.com/soenneker/soenneker.elevenlabs.openapiclientutil

A thread-safe utility for obtaining ElevenLabs's OpenApiClient singleton.

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https://github.com/soenneker/soenneker.firecrawl.openapiclientutil

A thread-safe utility for obtaining Firecrawl's OpenApiClient singleton.

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https://github.com/soenneker/soenneker.dnsimple.openapiclientutil

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

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https://github.com/soenneker/soenneker.mailgun.openapiclientutil

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https://github.com/cl0v1s/openapi-mcpify

Turn any OpenAPI spec into a live MCP server — with built-in confirmation prompts for mutating operations.

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https://github.com/tdspora/tdm_rulesgen

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https://github.com/merkys/openapi-render

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https://github.com/saibotsivad/glopen-routes

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

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https://github.com/ghchinoy/openapi-from-grpc

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