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/soenneker/soenneker.windmill.httpclients
A thread-safe singleton HttpClient for Windmill's OpenAPI integration.
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https://github.com/definancy/definancy-spec
Definancy contract — OpenAPI wire spec + cross-language conformance suite
Last synced: 06 Jun 2026
https://github.com/davidmosiah/delx-agent-utilities
Open-source stateless utility tools for AI agents: URL, DNS, TLS, OpenAPI, x402, JWT, CSV/JSON, cron, and composite reports.
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https://github.com/soenneker/soenneker.algolia.httpclients
A thread-safe singleton HttpClient for Algolia's OpenAPI integration.
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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/soenneker/soenneker.posthog.httpclients
A thread-safe singleton HttpClient for PostHog's OpenAPI integration.
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https://github.com/amandeepkaur1804/weather
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https://github.com/soenneker/soenneker.dnsimple.contacts
An async thread-safe singleton for DNSimple OpenApiClient's Contacts API
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https://github.com/libninjacom/benchling-rs
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https://github.com/soenneker/soenneker.x.clientutil
An async thread-safe singleton for X OpenApiClient
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https://github.com/soenneker/soenneker.netlify.openapiclientutil
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https://github.com/saibotsivad/glopen-routes
Some common routes that I find myself needing often, in glopen format.
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https://github.com/soenneker/soenneker.box.httpclients
A thread-safe singleton HttpClient for Box's OpenAPI integration.
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https://github.com/tonystrawberry/playground.openapi.generator
🚀 Demo project with OpenAPI Generator & Typescript
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https://github.com/ghchinoy/openapi-from-grpc
gRPC service with autogenerated OpenAPI spec via gRPC Gateway for REST/HTTP
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https://github.com/aiveraiva/api-documents
The documentation for my api
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https://github.com/wherejuly/60-1-oas-markdown-merger
Expand the OpenAPI JSON specification `description` fields by merging the arbitrary markdown files translated to HTML.
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https://github.com/libninjacom/mangadex-rs
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https://github.com/azhirov/openapi-3.0-types
This package provides TypeScript types for OpenAPI 3.0
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https://github.com/bretterer/openapi-codegen
Extendable Swagger Code Generator for PHP
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https://github.com/foorester/cook
Recipe manager
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https://github.com/those-otter-programs/spring_boot_3_restfull_api
A Spring Boot 3 RESTfull API sample
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https://github.com/libninjacom/petstore-go
Petstore client, generated from the OpenAPI spec
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https://github.com/soenneker/soenneker.discord.openapiclientutil
A thread-safe utility for obtaining Discord's OpenApiClient singleton.
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https://github.com/jinjihuang88-ui/maplebridge-open
Public API docs for MapleBridge, a North America to China B2B supplier matching platform.
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https://github.com/soenneker/soenneker.firecrawl.httpclients
A thread-safe singleton HttpClient for Firecrawl's OpenAPI integration.
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https://github.com/asafr-dev/supportdesk-api
SupportDesk tickets API (FastAPI): API-key auth, SQLAlchemy/Postgres, OpenAPI docs, tests, CI.
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https://github.com/astroway/astrology-api-openapi
OpenAPI 3.1 spec for the AstroWay astrology API — natal charts, synastry, transits, Vedic, Human Design, Tarot, Numerology. Generate a typed client in any language.
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https://github.com/bonukai/typescript-routes-to-openapi
Extract REST API routes from TypeScript files and generate OpenAPI documentation and input validators
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https://github.com/foxfriends/openfetch
Fetch-like OpenAPI client library
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https://github.com/fvillanuevape/springboot-springfox
Servicios REST en Spring Boot, SpringFox
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https://github.com/echelon-solutions/swagger-codegen-router-template
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https://github.com/vitorvogomes/fastapi-stand-livros
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https://github.com/edmartt/workorders
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https://github.com/mpreu/husqvarna-api-clients
Autogenerated API clients for Husqvarna APIs.
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https://github.com/ucl/isenseflu-openapi
OpenAPI Definitions for i-sense flu API
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https://github.com/dacr/primes-server-akkahttp
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https://github.com/bradpatras/openapi-swift-package-schema-only
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https://github.com/nakasar/serverless-api-doc-generator
Generate Documentation API from serverless.yml and JS docstrings.
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https://github.com/grofei/ps-bconnectopenapi
Powershell module for the baramundi OpenAPI Interface. This module is NOT a product of baramundi software GmbH.
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https://github.com/evilfreelancer/openchill
Prototype of Swagger / OpenAPI PHP client generator
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https://github.com/libninjacom/bump-rs
Bump.sh client, generated from the OpenAPI spec
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https://github.com/foospidy/postman-to-openapi-docker
Run postman-to-openapi from a docker container
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https://github.com/0x-jerry/openapi-ts
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https://github.com/syedabdullahrahman/e-commerce
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https://github.com/harmindersinghnijjar/question-translator-python
A Python program to translate GPT-3 answers from English to Punjabi using OpenAI and Google Translate.
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https://github.com/valerii15298/openapi-spec
OpenAPI Specification Rendered with Astro Starlight
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https://github.com/soenneker/soenneker.stoplight.openapibundler
A utility library to download and bundle OpenApi specs from Stoplight
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https://github.com/nachotoast/uoa-discords
Services and projects of UoA Discords.
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https://github.com/alexandramartinez/todo-app-mule-curietechai
Everything discussed in the 'From Zero to API with MuleSoft, CurieTech AI & Anypoint Code Builder' playlist.
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https://github.com/fs-frost/openapi2go
CLI tool to generate Go code from OpenAPI specifications.
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https://github.com/fibercrypto/skycoinr
Skycoin client libraries for the R programming language
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https://github.com/livingdocsio/openapi
OpenAPI (Swagger) spec for Livingdocs Public API
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https://github.com/soenneker/soenneker.twilio.httpclients
A thread-safe singleton HttpClient for Twilio's OpenAPI integration.
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https://github.com/leanhanc/hono-betterauth-openapi-starter
A Hono 🔥 starter project using Drizzle ORM and Stoker helpers, featuring Better Auth integration and API documentation powered by OpenAPI.
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https://github.com/kanryu/validagen
A validator generator for structs/maps for your go applications.
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https://github.com/gibtang/agent-utils
One API key. Agent-native utilities for AI agents. File hosting, PII redaction, dead letter queues, and more.
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https://github.com/kossahokia/bankcards
REST API for managing bank cards. Built with Java 21, Spring Boot, PostgreSQL, Liquibase, JWT, Docker, Swagger. Includes full authentication, roles, transfers & admin features.
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https://github.com/danhpaiva/pbh.smfa.viagensservidor.api.net
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https://github.com/eai04191/apidom-validate-cli
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https://github.com/av/tools
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https://github.com/soenneker/soenneker.wise.httpclients
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https://github.com/soenneker/soenneker.plaid.httpclients
A thread-safe singleton HttpClient for Plaid's OpenAPI integration.
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https://github.com/fdeniz07/realestatebackend
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https://github.com/mreiche/marketstack-openapi
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https://github.com/mahmudindev/oreno-comicking-openapi-python
Python-based generated ComicKing OpenAPI client.
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https://github.com/alessandro1918/swagger-api
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https://github.com/client-api/pmg-php
PHP SDK for the Proxmox Mail Gateway (PMG) API.
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https://github.com/thanadolps/swarch_rest
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https://github.com/n8n-code/n8n-nodes-odoo-v17
Odoo v17 is an all-in-one open-source ERP for managing all aspects of business in a single platform
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https://github.com/kwaytv/hono-steamer-api
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https://github.com/mikeirvingweb/dotnet-open-api-swagger-demo
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https://github.com/soenneker/soenneker.calcom.httpclients
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https://github.com/toshiemon18/schemar
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https://github.com/dapper91/python-openapi-ui-bundles
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https://github.com/apisyouwonthate/openapinotswagger.com
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https://github.com/ubill-ge/sdk-ts
TS/JS SDK for working with the UBill API
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