tmenier/Flurl

Health v2 · maintenance only

Adoption not part of the score

4403 stars · 397 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Flurl is a fluent URL builder and testable HTTP client library for .NET, available as a stand-alone URL builder (Flurl) or with HTTP features (Flurl.Http). It wraps HttpClient with a chainable, clientless API and built-in HTTP call faking for unit tests.

Use cases

• build and manipulate URLs fluently in C#
• call REST APIs with a fluent HTTP client
• deserialize JSON API responses into typed objects
• unit test code that makes HTTP calls without a real server
• manage HttpClient instances per host automatically
• configure timeouts, redirects, and headers per request or client

When to choose

• you're on .NET and want a concise, chainable alternative to raw HttpClient
• you need easy mocking/faking of HTTP calls in unit tests
• you want automatic client lifetime management to avoid socket exhaustion
• you frequently construct URLs with query params, path segments, and encoding

When to avoid

• you need gRPC, GraphQL, or non-HTTP protocols
• you prefer explicit control over HttpClient/Polly pipelines
• you're not on the .NET platform
• you rely heavily on dynamic JSON responses (dropped in 4.0)

Facets

library · maturity stable

http-client testing serialization web-development developer-tools apis dotnet cross-platform fluent-api url-builder rest-client http-testing nuget

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