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.posthog.openapiclientutil
A thread-safe utility for obtaining PostHog's OpenApiClient singleton.
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https://github.com/carlagesa/openai-chatbot
🤖ChatBot built on OpenAI
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https://github.com/developerkunal/openmorph
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/drewalth/openapi-generator
Generate an OpenAPI Spec file from ORM model definitions
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https://github.com/soenneker/soenneker.x.clientutil
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https://github.com/swimmwatch/openapi-compare-version
A GitHub Action for comparing OpenAPI specifications version.
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https://github.com/libninjacom/dhl-rs
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OpenAPI specification for the Wavix API
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Postman collection generator plugin for OpenAPI specifications — converts OpenAPI specs into ready-to-import Postman collections (v2.1.0).
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https://github.com/scrntprcrz/openapi-sankeylizer
Visualize your OpenAPI specs as Sankey diagrams. Upload, explore request/response flows, and export as PNG.
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Contract-first vertical slices for TypeScript Web/API systems. OpenAPI as Single Source of Truth with enforceable guardrails.
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https://github.com/annettedorothea/api2ai
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