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/adrianhdezm/openapi-tools
Just another CLI tool to work with OpenAPI specifications, including generation, validation, and more.
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https://github.com/zaydiscold/goodreads-cli
Unofficial CLI + MCP for the full Goodreads API — shelves, ratings, reviews, friends, feed, giveaways (read + write). The API map is the product.
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https://github.com/kemalkochekov/effectivemobiletestproject
Effective Mobile company's Test Project
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https://github.com/mizcausevic-dev/compliance-event-ledger
Java Spring Boot backend for immutable compliance event history, timeline retrieval, exception pressure scoring, and audit-friendly governance workflows
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https://github.com/mizcausevic-dev/webhook-ingestion-pipeline
Webhook Ingestion Pipeline
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https://github.com/mizcausevic-dev/signal-orchestration-lab
Python + FastAPI orchestration backend for dependency-aware signal routing, escalation sequencing, and cross-functional response planning.
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https://github.com/mizcausevic-dev/content-workflow-intelligence-platform
TypeScript platform for editorial workflow intelligence, publishing readiness scoring, bottleneck visibility, and content operations governance.
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https://github.com/opastorello/unifi-api-docs
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/hurricanemark/aspnetwebapi
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https://github.com/faisalaffan/community-waste-collection-api
REST API for community waste collection — households, pickups, payments, and reports. Built with Go Fiber
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https://github.com/soenneker/soenneker.make.openapiclient
A .NET client generated from the Make OpenAPI schema, updated daily
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Open source Jira CLI for Jira Cloud REST API v3. Manage issues, comments, transitions, worklogs, and JQL from the terminal or LLM agents.
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https://github.com/apimatic/skills
AI agent skills for APIMatic. Build, configure, and publish developer portals, generate SDKs, and optimize OpenAPI specs from Claude Code, Cursor, and Codex.
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https://github.com/go-api-libs/jobicy
Go library for the Remote Jobs API/RSS Feed. Discover and integrate a diverse range of remote job listings with Jobicy's public API. This API offers the latest remote job opportunities across various industries and regions, making it a valuable resource for developers and businesses looking to enhance their job feed platforms.
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https://github.com/mrtaz77/pantrypal
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https://github.com/tryagi/runway
C# SDK based on Runway OpenAPI specification
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https://github.com/abdallahsaber065/openapi-tester-frontend
A clean, user-friendly frontend application for testing any OpenAPI-compliant API dynamically. This tool loads your API specification from OpenAPI JSON files or URLs and provides an intuitive interface for testing all endpoints without needing external tools like Postman.
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https://github.com/soenneker/soenneker.cohere.openapiclient
A .NET client generated from the Cohere AI OpenAPI schema, updated daily
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https://github.com/soenneker/soenneker.plaid.openapiclientutil
A thread-safe utility for obtaining Plaid's OpenApiClient singleton.
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https://github.com/soenneker/soenneker.rebrickable.openapiclient
A Rebrickable .NET client generated from the Rebrickable OpenAPI schema, updated daily
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https://github.com/charconstpointer/ihateannotations
Example combining buf, Protobuf, gRPC, gRPC Gateway and OpenAPI
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https://github.com/nikita-volkov/modeliero
Swiss army knife for model code-generation (in beta)
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https://github.com/swooby/openai-openapi-kotlin
OpenAI OpenAPI Specification - Kotlin
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https://github.com/soenneker/soenneker.algolia.openapiclientutil
A thread-safe utility for obtaining Algolia's OpenApiClient singleton.
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https://github.com/libninjacom/mangadex-rs
mangadex client, generated from the OpenAPI spec
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https://github.com/those-otter-programs/spring_boot_3_restfull_api
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https://github.com/foncki/time-complexity-calculator
This Chrome extension allows you to easily calculate the time complexity of a function. This tool is useful for software developers looking to optimize their code and improve its performance. With this extension, you can quickly and easily determine the efficiency of your functions and make informed decisions about how to optimize them.
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https://github.com/p-fruck/rt-openapi
Deterministic OpenAPI spec generation for RequestTracker REST 2.0 API
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