The OpenAPI.NET SDK contains a useful object model for OpenAPI documents in .NET along with common serializers to extract raw OpenAPI JSON and YAML documents from the model.
Star History
Momentum
+40
STARS · LAST 30 DAYS
1
PER DAY
#121
MOST-STARRED C#
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +7 | +40 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +1 | +6 | +14 |
OpenAPI.NET gained 40 stars in the last 30 days, about 1 a day, and now has 1.6K. It is about 9 years old and has averaged roughly 179 stars a year. It ranks #121 among C# repositories and #2,203 across all languages on GitHubRepo.
Trending Record
2
DAYS ON TRENDING
#2514
BEST RANK
Sep 28, 2026
FIRST APPEARANCE
Active
STATUS TODAY
OpenAPI.NET has maintained a continuous presence across global trending indexes, peaking at #2514. Below is the 30-day activity profile:
💡 Overview
OpenAPI.NET is an open-source project written in C#: The OpenAPI.NET SDK contains a useful object model for OpenAPI documents in .NET along with common serializers to extract raw OpenAPI JSON and YAML documents from the model.
Engineered for speed, consistency, and developer ease, it solves common hurdles in http, openapi. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in C# for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/microsoft/OpenAPI.NET.git
cd OpenAPI.NET⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
C# environment and standard tooling
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
OpenAPI.NET coordinates its core functionality through a modular C# pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Production System Integration
Embed OpenAPI.NET into C# backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open MIT license.
🚀 Getting Started
Install OpenAPI.NET using your package manager: `git clone https://github.com/microsoft/OpenAPI.NET.git`
Initialize your project workspace or configuration file for OpenAPI.NET.
Import OpenAPI.NET into your codebase or invoke it directly from your terminal.
Execute your test suite or run `OpenAPI.NET --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with C#, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
microsoft/OpenAPI.NET is currently ranked #2,203 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #2,197 | e2b-dev/runtime | Go | ★ 1.6K | Compare ↗ |
| #2,199 | adzap/validates_timeliness | Ruby | ★ 1.6K | Compare ↗ |
| #2,200 | PegaProx/project-pegaprox | JavaScript | ★ 1.6K | Compare ↗ |
| #2,201 | alfio-event/alf.io | Java | ★ 1.6K | Compare ↗ |
| #2,201 | mongodb/mongo-php-library | PHP | ★ 1.6K | Compare ↗ |
| #2,203 | microsoft/OpenAPI.NET This Project | C# | ★ 1.6K | |
| #2,204 | sporkmonger/addressable | Ruby | ★ 1.6K | Compare ↗ |
| #2,205 | NethermindEth/nethermind | C# | ★ 1.6K | Compare ↗ |
| #2,206 | vitorpamplona/amethyst | Kotlin | ★ 1.6K | Compare ↗ |
| #2,207 | uber/ADR | Python | ★ 1.6K | Compare ↗ |
| #2,207 | Asymptote-Labs/agent-beacon | Go | ★ 1.6K | Compare ↗ |
Frequently Asked Questions
What does OpenAPI.NET do? +
The OpenAPI.NET SDK contains a useful object model for OpenAPI documents in .NET along with common serializers to extract raw OpenAPI JSON and YAML documents from the model.
What language is OpenAPI.NET written in? +
The primary language is C#. Topics include: http, openapi.
Is OpenAPI.NET actively maintained? +
Yes, the last recorded push was on Sep 28, 2026 with 31 open issues being tracked.
How many stars does OpenAPI.NET have? +
OpenAPI.NET has 1,611 stars and 286 forks on GitHub.
How does OpenAPI.NET rank among GitHub repositories? +
With 1,611 stars, microsoft/OpenAPI.NET is ranked #2,203 globally across all repositories tracked on GitHubRepo and #121 among C# projects.
What license is OpenAPI.NET distributed under? +
The repository reports a MIT license. Always verify the repository LICENSE file for legal terms.
