CoAPSharp is the world’s first implementation of Constrained Application Protocol (CoAP, learn more) on the Microsoft’s .NET Micro Framework. With thousands of downloads, it remains the most popular open source (LGPL) CoAP implementation on the .NET platform.

The CoAP library can be recompiled for any other .NET framework flavor. It brings Internet of Things to the C# and .NET community.

NOTE: CoAPSharp was originally developed by EXILANT. It is now acquired by Idaax.


  1. Core CoAPSharp Library
  2. CoAPSharp Library for Windows 10 IoT Core (Experimental)
  3. Free eBook on CoAP with examples in CoAPSharp
  4. eBook sample code