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/jpcadena/fastapi-poetry-test
FastAPI test project using Poetry as interpreter.
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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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https://github.com/soenneker/soenneker.sentry.openapiclient
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https://github.com/oxhq/oxcribe
Runtime-first Laravel package that enriches routes with Oxinfer static analysis
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https://github.com/arkptz/mitm2openapi
Convert mitmproxy flow dumps and HAR files to OpenAPI 3.0 — fast Rust alternative to mitmproxy2swagger with HAR support
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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
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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.windmill.httpclients
A thread-safe singleton HttpClient for Windmill's OpenAPI integration.
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A thread-safe utility for obtaining Mailgun's OpenApiClient singleton.
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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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A thread-safe singleton HttpClient for PostHog's OpenAPI integration.
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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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A thread-safe singleton HttpClient for Box's OpenAPI integration.
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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/badsyntax/lamernews-api-client
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https://github.com/azhirov/openapi-3.0-types
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https://github.com/himenon/argo-rollouts-typescript-openapi
Generate TypeScript Code from Argo Rollouts OpenAPI Schema.
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https://github.com/huksley/swagger-explorer
Run Swagger UI locally against a folder of OpenAPI or Swagger specifications
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https://github.com/soenneker/soenneker.discord.openapiclientutil
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https://github.com/rafhael-s-p/rest-api-studies
API for study purposes
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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/valerii15298/openapi-spec
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Everything discussed in the 'From Zero to API with MuleSoft, CurieTech AI & Anypoint Code Builder' playlist.
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https://github.com/kanryu/validagen
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https://github.com/alessandro1918/swagger-api
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https://github.com/lifeiscontent/openapi-sdk
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https://github.com/govuk-one-login/spec-retriever
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https://github.com/ddonamaria/test-auth
[Prueba técnica] - Microservicio de autenticación mediante token.
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https://github.com/the-orange-alliance/toa-docs
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https://github.com/colorfulcompany/node-indeed-job-campaign-api-client
Indeed Job Campaign API Client with automatically OAuth Token refreshing
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https://github.com/ahilke/openapi-microservice-playground
A demo project to showcase and experiment with various OpenAPI technologies in a microservice environment.
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A thread-safe singleton HttpClient for OpenRouter's OpenAPI integration.
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https://github.com/soenneker/soenneker.fastly.httpclients
A thread-safe singleton HttpClient for Fastly's OpenAPI integration.
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https://github.com/soenneker/soenneker.box.openapiclientutil
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https://github.com/vicradon/petstore
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https://github.com/joergschultzelutter/openapi-to-robot-framework-datadriver-testgenerator
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/duquejo/quarkus-tokencache-microservice
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A thread-safe singleton HttpClient for Trulioo's OpenAPI integration.
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https://github.com/speakeasy-sdks/template-speakeasy-bar
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https://github.com/hyesungoh/cultural_heritage_administration_api
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https://github.com/roxyapi/sdk-typescript
TypeScript SDK for RoxyAPI. Western astrology, Vedic kundli, tarot, numerology, horoscope, birth chart, I Ching, biorhythm, crystals, dream, and angel number APIs. One key, 10 domains, fully typed. AI agent and MCP ready.
ai-agents angel-numbers astrology-api biorhythm-api birth-chart-api crystals dream-interpretation horoscope-api i-ching-api kundli-api mcp-server model-context-protocol nodejs numerology-api openapi roxyapi spiritual-api tarot-api typescript-sdk vedic-astrology-api
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https://github.com/sosokker/go-chi-oapi-codegen-todolist
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https://github.com/soenneker/soenneker.attributes.publicopenapiendpoint
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https://github.com/robsonlmds/java-screenmatch
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https://github.com/libninjacom/postman-go
Postman client, generated from the OpenAPI spec
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https://github.com/quickwrench/quickwrench-api
QuickWrench backend API written using Django ⚡
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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
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https://github.com/fibercrypto/libjs-skycoin
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