Top 23 C# REST-API Projects

REST-API

• Add a project

1. modular-monolith-with-ddd

   1 19 13,701 7.0 C#

   Full Modular Monolith application with Domain-Driven Design approach.

   

   Project mention: I Curated 106 Software Design Resources and Ranked What Actually Matters | dev.to | 2026-02-12

   kgrzybek/modular-monolith-with-ddd — The most complete Modular Monolith example I've seen. C#, but the patterns are universal.

2. ReSharper

   www.jetbrains.com featured

   ReSharper is now available in VS Code and Cursor. ReSharper brings a professional toolset for C# developers backed by over 20 years of experience, enterprise-grade security, SOC 2 compliance, and the trust of companies worldwide.

   

3. run-aspnetcore-microservices

   2 2 3,234 5.0 C#

   Microservices on .NET platforms used ASP.NET Web API, Docker, RabbitMQ, MassTransit, Grpc, Yarp API Gateway, PostgreSQL, Redis, SQLite, SqlServer, Marten, Entity Framework Core, CQRS, MediatR, DDD, Vertical and Clean Architecture implementation with using latest features of .NET 8 and C# 12

   

4. TodoApp

   3 10 3,106 3.7 C#

   Todo application with ASP.NET Core Blazor WASM, Minimal APIs and Authentication

   

5. sample-dotnet-core-cqrs-api

   4 2 3,053 0.0 C#

   Sample .NET Core REST API CQRS implementation with raw SQL and DDD using Clean Architecture.

   

6. coolstore-microservices

   5 1 2,525 0.0 C#

   A full-stack .NET microservices build on Dapr and Tye

   

7. FilterLists

   6 131 1,631 9.6 C#

   :shield: The independent, comprehensive directory of filter and host lists for advertisements, trackers, malware, and annoyances.

   

   Project mention: Hold on to Your Hardware | news.ycombinator.com | 2026-03-27

   Yeah, I remember going on https://filterlists.com/ one day all mad and just adding a ton because of how many ads and manipulative patterns I was dealing with

8. Smartstore

   7 4 1,487 9.9 C#

   A modular, scalable and ultra-fast open-source all-in-one eCommerce platform built on ASP.NET Core 10

   

9. SaaSHub

   www.saashub.com featured

   SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

   

10. Nager.Date

    8 4 1,370 8.6 C#

    Easily access public holidays for 100+ countries via .NET, REST API, Docker, or NuGet for online and offline use.

    

    Project mention: Show HN: Toolbrew – Free little tools without signups or ads | news.ycombinator.com | 2025-09-28

    I've been wanting to create a similar holiday optimizer tool myself, but what you've done is marvelous! Do you take requests for new countries? I see that you're using https://date.nager.at/ as the source and country is listed, so perhaps it's easily doable?

11. Grid.Blazor

    9 2 733 7.3 C#

    Grid component with CRUD for Blazor (client-side and server-side) and ASP.NET Core MVC

    

12. JsonApiDotNetCore

    10 7 715 9.2 C#

    A framework for building JSON:API compliant REST APIs using ASP.NET and Entity Framework Core.

    

13. api-bricks-sdk

    11 1 527 10.0 C#

    SDKs for CoinAPI & FinFeedAPI

    

    Project mention: Pull Real-Time SEC Filings and Stock Data in Python (and Analyze It With AI!) | dev.to | 2025-06-25

    API Bricks SDK GitHub

14. WatsonWebserver

    12 1 498 8.8 C#

    Watson is the fastest, easiest way to build scalable RESTful web servers and services in C#.

    

    Project mention: Beyond ASP.NET: Lightweight Alternatives for C# Web Development | dev.to | 2025-12-22

    Watson has been around for several years, is part of the .NET Foundation and receives large commits approximately once a year.

15. Warewolf

    13 0 277 0.0 C#

    Effortless Microservice Design and Integration. This repository includes the code-base for the Warewolf Studio and Server.

    

16. Remora.Discord

    14 1 259 8.5 C#

    A data-oriented C# Discord library, focused on high-performance concurrency and robust design.

    

17. Universalis

    15 18 207 7.4 C#

    A crowdsourced market board API for FFXIV.

    

18. WebApiToolkit

    16 1 150 9.2 C#

    WebApi toolset that allows you to make CRUD REST APIs with one line of code and to create gRPC and SignalR from reusable components too

    

19. LeetU

    17 5 107 5.0 C#

    A basic REST API using EFCore and SQLite

    

20. tgstation-server

    18 1 86 9.4 C#

    A production scale tool for DreamMaker server management

    

21. didact-engine

    19 12 78 7.2 C#

    The REST API and execution engine for the Didact Platform.

    

22. RESTful-Unity

    20 1 65 0.0 C#

    RESTful-Unity aims to provides a simple RESTful HTTP server for Unity3d.

    

23. AuthApi

    21 3 64 8.1 C#

    An example of a full-stack application for Authentication and Authorization, build with ASP.NET Core 10.0 (Minimal API) and Angular 21.

    

    Project mention: C# Minimal API: Multiple Authentication Schemes with Swagger Support | dev.to | 2025-12-31

    The following example project demonstrates multiple authentication schemes with swagger support: AuthApi

24. Net8CoreApiBoilerplate

    22 6 46 4.6 C#

    Net Core Api startup project that can be used as base to upgrade legacy projects or start new one

    

25. nanoFramework.WebServer

    23 1 39 6.9 C#

    📦 Web server for .NET nanoFramework packed with features: REST api using attributes, multithread requests, parameters in query URL, static files serving.

    

26. SaaSHub

    www.saashub.com featured

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

    

C# REST-API related posts

• Microsoft Agent Framework with Foundry Local in .NET/C#

  4 projects | dev.to | 28 Dec 2025

• Modular Monolith with DDD repository migrated to .NET 8.0

  1 project | /r/dotnet | 9 Dec 2023

• The Starlight Celebration Begins December 15!

  1 project | /r/ffxiv | 8 Dec 2023

• Best way to implement base class for API calls?

  2 projects | /r/csharp | 7 Dec 2023

• New to MMOs and have some important questions before I begin. Should I start with Dynamis?

  1 project | /r/ffxiv | 6 Dec 2023

• .NET Blazor

  7 projects | news.ycombinator.com | 21 Nov 2023

• Self hosted DNS solution

  2 projects | /r/selfhosted | 27 Oct 2023
• A note from our sponsor - ReSharper
  www.jetbrains.com | 12 Jun 2026

  ReSharper brings a professional toolset for C# developers backed by over 20 years of experience, enterprise-grade security, SOC 2 compliance, and the trust of companies worldwide. Learn more →

Index

Sponsored

ReSharper is now available in VS Code and Cursor

ReSharper brings a professional toolset for C# developers backed by over 20 years of experience, enterprise-grade security, SOC 2 compliance, and the trust of companies worldwide.

www.jetbrains.com

Do not miss the trending C# projects with our weekly report!