Radar check
What we found when we opened it. Every bar is one fact, with its date.
Last code pushed 7 Sep 2026, 48 days before this check.
Latest release v14.7.1 on 20 Apr 2026.
Public since September 2015, about 11 years.
7,369 stars and 1,363 forks.
2 commits and 11 new issues in the last 90 days.
335 contributors. 2 pull requests merged in 90 days.
No security policy file says how to report a problem. No published security advisories.
How the bars are scored
- Alive. Days since the last code push: a week or less 100, a month 90, three months 70, six months 50, a year 30, eighteen months 15, older 0.
- Releases. Age of the latest GitHub release, on a similar scale; no bar when the project publishes no releases.
- Maturity. Age of the project: eight years 100, five 90, three 70, two 55, one 40, six months 25, younger 10.
- Adoption. Stars on a log scale: 100,000 stars is 100, 10,000 is 80, 1,000 is 60, 100 is 40.
- Activity. Commits in the last 90 days: 300 or more 100, 100 85, 30 65, 10 45, any 25.
- Community. People who have contributed: 100 or more 100, 30 80, 10 60, 5 40, 2 25, one 10.
- Security. A published security policy 80, none 40; published advisories are listed, not scored.
Checked by Repo Radar on 26 Oct 2026 from the repository on GitHub.
In simple English
This tool helps developers who build web services in the C# language. It reads your server code and writes documentation for other programmers to read. It also creates client code so other programs can talk to your server easily. You can run it inside your app, or use it from the command line. It costs nothing to use under an MIT licence.
What it is
NSwag is an OpenAPI and Swagger toolchain written in C# for .NET and TypeScript platforms. It combines API document generation and client code generation into a single package.
What it is good for
Solo builders who make web APIs in C# and need to generate TypeScript client code or interactive documentation web pages without maintaining separate tools.
- Combines API document generation and client code generation in one package.
- Includes a Windows desktop app called NSwagStudio for visual configuration.
- Integrates directly into ASP.NET Core middleware to serve documentation pages.
- Requires familiarity with .NET development and C# tooling.
- Large number of open issues on GitHub may signal slow support for edge cases.
- Configuration can become complex when mixing command-line and MSBuild targets.
Writing API client code and documentation manually
ASP.NET Core
- domaindrivendev/Swashbuckle.AspNetCore5.5k stars
Generates Swagger documentation for ASP.NET Core apps.
- evanw/esbuild40k stars
Joins many JavaScript, TypeScript and CSS files into one, in well under a second.
- Textualize/textual38k stars
Lets a Python program draw a real interface inside a terminal, and serve the same thing to a browser.
- python-attrs/cattrs1.1k stars
Turns loose data into declared Python objects, and declared objects back into loose data.
dotnet add package NSwag.AspNetCore