Top 20 NuGet WebAPI Packages

WebAPI

Access token validation middleware for JWT and reference tokens issued by IdentityServer3.
ASP.NET Identity support for IdentityServer3 repackaged as a dll client library, preventing the addition of volatile source code to the destination project
OS33 client API interfaces
An API Client for Recurly - Subscription billing automation.
Exceptionless client for ASP.NET Web API applications. Exceptionless is a cloud based error reporting service that sends your exceptions to https://exceptionless.com and provides aggregated views and analytics.
Nancy Scaffolding with log, serializer, all structure to work good for me :D
Provides numerous helper classes for building and testing multi-tier ASP.NET Core Web Applications
Manage PDF documents in ASP.NET MVC 4 application. Web API controller that allows to manage PDF documents. JavaScript classes for managing PDF document and visual tools for working with PDF document in HTML5 image viewer.
Manage PDF documents in ASP.NET MVC 5 application. Web API 2 controller that allows to manage PDF documents. JavaScript classes for managing PDF document and visual tools for working with PDF document in HTML5 image viewer.
NSwag: The Swagger API toolchain for .NET and TypeScript
Core Web library for Arragro.
C# API for the Anki Vector robot.
Serilog logger for Nancy web applications. Handler request, response and exceptions.
Project containing the core models used in TwitchLib.Api
Project containing the core of TwitchLib.Api
Project containing the V5 models used in TwitchLib.Api
Project containing the Helix models used in TwitchLib.Api
Provides Ocelot extensions to use the administration API and IdentityService dependencies that come with it
The Relativity event handler framework .NET package.
The Relativity custom pages framework .NET package.