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

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

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https://github.com/libninjacom/readme-rs

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

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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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Zod to DTO classes for TypeScript & NestJS & OpenAPI

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https://github.com/neelagarwal98/modular-equity-research-system

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https://github.com/shearichard/analyse-awesome-openapi

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Proyecto Java utilizando: Java 17, SpringBoot, Docker, API REST, Hibernate, Swagger, MySQL y Maven.

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https://github.com/egonw/grant-api

Garlic API around Wikidata for research grants

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Typescript pre-generated OpenAPIs clients

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Generates a fully-fledged Robot Framework Datadriver test and (optional) Jira/XRay test tickets from an OpenAPI V3 JSON/YAML schema file.

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https://github.com/instantan/web

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https://github.com/gabireze/password-generator-api

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Postman collections for astrology, Vedic, tarot, numerology, I Ching, biorhythm, Human Design and more. Auto synced from OpenAPI, one API key.

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A minimal, protocol-agnostic standard to connect LLMs like drivers with external tools using existing APIs and formats like OpenAPI, HTTP, AS2, or CAN-Bus. No custom stacks. Just structured function calls.

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

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

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https://github.com/burin-labs/harn-openapi

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OpenMorph: Modern CLI & TUI for safe, interactive OpenAPI vendor extension key transforms with colorized diffs, dry-run, and config merging.

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https://github.com/swimmwatch/openapi-compare-version

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Espelho automatico e versionado da documentacao oficial da API UniFi (Site Manager, Network, Protect, Mobility) - OpenAPI + Markdown, atualizado diariamente por CI

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https://github.com/alcandev/book-inventory-react-vite-nest-postgres

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https://github.com/vincentbollaert/turborepo-playground

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https://github.com/dieperid/bucket-adapter

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https://github.com/adrianhdezm/openapi-tools

Just another CLI tool to work with OpenAPI specifications, including generation, validation, and more.

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https://github.com/alexandrelamberty/nidus-api-spec

:diamond_shape_with_a_dot_inside: Home Automation and Monitoring API Specification using the OpenAPI standard.

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https://github.com/mizcausevic-dev/compliance-event-ledger

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TypeScript API for incident severity analysis, escalation routing, responder visibility, and operational incident-command workflows.

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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/piyush06singhal/weather_app

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Docker/podman containers for OAS documentation and registry

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