nancyfx/nancy

Nancy was a C# web framework for building HTTP-based services on the .NET platform, including .NET Framework.NET Core, and Mono. The project is no longer actively maintained, and the repository now leads with that announcement. Former team members are available for paid support or migration help if your organization still depends on it in production. The central philosophy was what the project called the "super-duper-happy-path": a framework designed to just work without pushing configuration or ceremony onto the developer. New modules were automatically discovered when added. Dependencies were wired up without manual registration. Core behaviors like routing strategy or dependency container could be swapped with minimal effort. The idea was for Nancy's own code to stay invisible so your application code could be the focus. In practice, Nancy handled all standard HTTP request types and provided a short, readable syntax for defining routes and returning responses. You could return a plain string, a status code, or a stream directly from a route handler without wrapping it in a special object. The framework included support for several view and template engines such as Razor and Spark, advanced route pattern matching, content negotiation, and a testing framework for verifying your application's behavior. Nancy ran on multiple hosting environments including ASP.NET, WCF, self-hosting, and OWIN-compatible hosts, so it was not tied to a single deployment setup. It attracted more than 150 contributors and around 7,100 GitHub stars during its active life. If you are evaluating it for a new project, bear in mind it is archived software with no active development. The permissive license allows forking for maintenance if needed, though the project name and logos are not available for reuse.