RestSharp

RestSharp is a simple REST and HTTP API client library for .NET that wraps HttpClient with a fluent API for making HTTP requests with automatic serialization and deserialization of request and response bodies. Used by developers building .NET applications that consume REST APIs. Apache-2.0 licensed, .NET Foundation project with 9,800+ GitHub stars.

Website: https://restsharp.dev/ GitHub: https://github.com/restsharp/RestSharp NuGet: https://www.nuget.org/packages/RestSharp Current Version: 114.0.0 (released March 2026)

Library

RestSharp .NET Client Library

A fluent .NET HTTP client library supporting JSON, XML, and CSV serialization, OAuth1/OAuth2/JWT/Basic authentication, async operations, multipart file uploads, and comprehensive parameter management.

• Documentation: https://restsharp.dev/docs/intro/
• GitHub: https://github.com/restsharp/RestSharp
• License: Apache-2.0
• Target Frameworks: .NET 8.0, .NET Standard 2.0, .NET Framework 4.7.1

Common Properties

Type	URL
Website	https://restsharp.dev/
Documentation	https://restsharp.dev/docs/intro/
GitHub Organization	https://github.com/restsharp
NuGet Package	https://www.nuget.org/packages/RestSharp
License	Apache-2.0
Issue Tracker	https://github.com/restsharp/RestSharp/issues

Artifacts

JSON Schemas

File	Description
json-schema/restsharp-rest-client-options-schema.json	RestClientOptions configuration schema
json-schema/restsharp-rest-request-schema.json	RestRequest object schema

JSON Structures

File	Description
json-structure/restsharp-rest-client-options-structure.json	RestClientOptions field reference
json-structure/restsharp-rest-request-structure.json	RestRequest field reference

JSON-LD Context

File	Description
json-ld/restsharp-context.jsonld	JSON-LD context for RestSharp library vocabulary

Examples

File	Description
examples/restsharp-get-request-example.json	Simple typed GET request
examples/restsharp-post-json-example.json	POST JSON body with typed response
examples/restsharp-bearer-auth-example.json	Bearer token authentication setup

Vocabulary

File	Description
vocabulary/restsharp-vocabulary.yml	Domain vocabulary for RestSharp classes, methods, and concepts

Quick Start

dotnet add package RestSharp

var options = new RestClientOptions("https://api.example.com");
var client = new RestClient(options);
var request = new RestRequest("/users/{id}");
request.AddUrlSegment("id", 42);
var user = await client.GetAsync<User>(request);

Maintainers

• Kin Lane — kin@apievangelist.com