Powerful API Testing, Zero Compromise
HTTP Client
Make requests to your favorite HTTP endpoints and test your local WebApi projects with ease. Keep a history of your requests and save collections of related calls for quick access.
Make HTTP requests to any endpoint
Request history tracking
Save and organize collections
Developer Experience
Built by developers, for developers. Siren focuses on a clean, distraction-free experience with no accounts, no cloud sync requirements, and no friction.
Light & Dark Mode
Local machine persistence
No Sign Up Required
Built with Modern Tech
Siren leverages cutting-edge .NET technologies for a native cross-platform experience. Built with Blazor Hybrid and Photino for a lighterweight, faster performance than a typical electron cross-platform app.
Blazor Hybrid & .Net 10
Photino to leverage native webviews
MudBlazor with Material 3 & ShadCn inspirations
Free & Open Source
Siren is completely free and open source under the MIT license. Inspect the code, contribute improvements, or fork it for your own needs. All releases are signed executables for your security.
MIT Licensed on GitHub
Community Contributions Welcome
Full Source Code Available