Top 20 NuGet http Packages

Lightweight Http Mocking Server for .Net, inspired by WireMock from the Java landscape.
Lightweight StandAlone Http Mocking Server for .Net.
Chilkat .NET Class Library (32-bit) for SSH/SFTP, FTP, PDF, CAdES, XAdES, REST, POP3, SMTP, IMAP, SSL/TLS, Zip, REST, OAuth2, HTTP, RSA, XML DSig, Encryption, Compression, XML, Socket, XMP, HTML to XML, JSON, JWT, OAuth1, conversion, PKCS12/PFX, Java Keystore, ASN.1, PEM, ECC, Async, ...
Provides AppSelfHostBase implementation for .NET Core's Kestrel Self Host HTTP Server To get started see: https://servicestack.net/getting-started
.NET's fastest JSON, JSV and CSV Text Serializers. Fast, Light, Resilient. Contains ServiceStack's high-performance text-processing powers, for more info see: https://github.com/ServiceStack/ServiceStack.Text
A Serilog sink sending log events over HTTP.
A fluent, testable HTTP client library.
XML extensions to Flurl.Http
.NET's fastest JSON, JSV and CSV Text Serializers. Fast, Light, Resilient. Contains ServiceStack's high-performance text-processing powers, for more info see: https://github.com/ServiceStack/ServiceStack.Text
The buttoned-up and boring, but deeply analyzed, implementation of Signature Version 4 (SigV4) in .NET.
Chilkat .NET Class Library (64-bit) for SSH/SFTP, FTP, PDF, CAdES, XAdES, REST, POP3, SMTP, IMAP, SSL/TLS, Zip, REST, OAuth2, HTTP, RSA, XML DSig, Encryption, Compression, XML, Socket, XMP, HTML to XML, JSON, JWT, OAuth1, conversion, PKCS12/PFX, Java Keystore, ASN.1, PEM, ECC, Async, ...
Chilkat .NET Core Class Library
A simple caching library to cache any data structure for a specific amount of time in any .NET application. Additionally, offers simple HTTP methods for caching web request data. Powered by FileStore.
Restores Newtonsoft.JSON as the default serializer for RestSharp.
A C# Http Multipart/form-data parser that works correctly on binary data and very large files.
A native functional ASP.NET Core web framework for F# developers.
A library that adds the Json verb methods to the httpclient
A (very simple) HTTP server which you can use from within a testing environment or, if you're really ambitious, for some other reason.
Provides infrastructure for common error handling, tracing, configuration, and HTTP/REST-based pipeline manipulation for REST clients generated with Hyak.
This is the Flurl.Http package, repackaged with strongly named assemblies. See https://flurl.io/ for the official project.