RestSharp website screenshot

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. Supports JSON, XML, and CSV formats, OAuth1/OAuth2 authentication, async operations, and multi-part form uploads. Available on NuGet as RestSharp (9,800+ GitHub stars, Apache-2.0 license, .NET Foundation project).

RestSharp publishes 1 API on the APIs.io network. Tagged areas include .NET, Apache License, C#, HTTP Client, and NuGet.

The RestSharp catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

RestSharp’s developer surface includes documentation, support, and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub
31.4/100 thin ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemium
1 APIs
.NETApache LicenseC#HTTP ClientNuGetOpen SourceSDKs

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 31.4/100 · thin
Contract Quality 3.2 / 25
Developer Ergonomics 2.6 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.8 / 13
Governance 7.0 / 12
Discoverability 5.9 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/restsharp: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

RestSharp

RestSharp is a simple REST and HTTP API client library for .NET, wrapping HttpClient with a fluent API for making HTTP requests with automatic serialization and deserialization ...

Pricing Plans 1

Published pricing tiers and plan structures.

Restsharp Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Restsharp Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Restsharp Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Restsharp Context

25 classes · 4 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

RestSharp API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

RestClientOptions

12 properties

JSON SCHEMA

RestRequest

6 properties

JSON SCHEMA

JSON Structure 2

JSON Structure definitions describing this provider's data shapes.

Restsharp Rest Client Options Structure

0 properties

JSON STRUCTURE

Restsharp Rest Request Structure

0 properties

JSON STRUCTURE

Examples 3

Example request and response payloads for these APIs.

Restsharp Bearer Auth Example

6 fields

EXAMPLE

Restsharp Get Request Example

6 fields

EXAMPLE

Restsharp Post Json Example

6 fields

EXAMPLE

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Restsharp Domain Security

TLSv1.3

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 NuGet Package
NuGet Package

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 1

Pricing, plans, and the legal terms of use

License
License

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: restsharp
name: RestSharp
description: 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. Supports JSON, XML, and CSV
  formats, OAuth1/OAuth2 authentication, async operations, and multi-part form uploads. Available on NuGet as RestSharp (9,800+
  GitHub stars, Apache-2.0 license, .NET Foundation project).
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/restsharp.png
tags:
- .NET
- Apache License
- C#
- HTTP Client
- NuGet
- Open Source
- SDKs
url: https://raw.githubusercontent.com/api-evangelist/restsharp/refs/heads/main/apis.yml
created: '2026-03-27'
modified: '2026-05-02'
specificationVersion: '0.19'
apis:
- aid: restsharp:restsharp
  name: RestSharp
  description: 'RestSharp is a simple REST and HTTP API client library for .NET, wrapping HttpClient with a fluent API for
    making HTTP requests with automatic serialization and deserialization of request and response bodies. Current version:
    114.0.0 (released March 2026). Targets .NET 8.0, .NET Standard 2.0, and .NET Framework 4.7.1.'
  humanURL: https://restsharp.dev/
  tags:
  - .NET
  - C#
  - HTTP Client
  - NuGet
  - Open Source
  properties:
  - type: Documentation
    url: https://restsharp.dev/docs/intro/
  - type: GettingStarted
    url: https://restsharp.dev/docs/intro/
  - type: GitHub
    url: https://github.com/restsharp/RestSharp
  - type: NuGet
    url: https://www.nuget.org/packages/RestSharp
  - type: ChangeLog
    url: https://github.com/restsharp/RestSharp/releases
common:
- type: DomainSecurity
  url: security/restsharp-domain-security.yml
- type: Website
  url: https://restsharp.dev/
- type: Documentation
  url: https://restsharp.dev/docs/intro/
- type: GitHubOrganization
  url: https://github.com/restsharp
- type: NuGet Package
  url: https://www.nuget.org/packages/RestSharp
- type: License
  url: https://github.com/restsharp/RestSharp/blob/dev/LICENSE.txt
- type: Support
  url: https://github.com/restsharp/RestSharp/issues
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com