Refit review
A focused open-source library for generating typed C# HTTP clients from interfaces.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Refit is an open-source .NET library for developers who want to describe HTTP APIs through C# interfaces instead of writing client implementations manually. Interfaces and attributes define HTTP verbs, routes, query parameters, headers, request bodies, and response types. Refit then generates the client implementation during compilation, making it a focused choice for C# teams building applications across modern .NET, .NET Framework, WinUI, Blazor, and Uno Platform. It is intended for application development, not for interactive API exploration or a hosted API-client workspace.
Its strongest fit is the breadth of request-handling features around generated clients. Refit supports HttpClient integration and HttpClientFactory dependency injection, configurable JSON, Newtonsoft.Json, and XML serialization, multipart uploads, streamed responses, bearer authorization, and request-header handling. The source-generation approach keeps the interface as the central description of the client, while the testing package adds stubs, request verification, and simulated faults. Teams already working with HttpClientFactory, Newtonsoft.Json, or XML serializers can align Refit with those parts of their .NET stack. Choose it when typed contracts and generated implementations matter more than a graphical API workflow.
Refit is free and open source, with the published project focused on library capabilities rather than hosted plans or paid tiers. That keeps the product’s scope clear, but also means teams should evaluate it as a code dependency that belongs inside a C#/.NET application. Developers seeking a general-purpose API client, a cross-language tool, or AI features should choose an alternative category fit. For C# teams that want interface-driven HTTP clients with source generation, dependency injection, serialization options, streaming, uploads, authorization, and testing utilities, Refit is the more targeted option.
Refit pros and cons
- Where it wins
- Generates typed HTTP clients from C# interfaces and attributes
- Source generation supports compile-time request implementations
- Includes serialization, uploads, streaming, authorization, and testing tools
- Where it doesn't
- Designed for C# and .NET rather than language-agnostic API work
- A developer library, not an interactive hosted API client
- No built-in AI features
Refit fact sheet, pricing and score →
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