OpenApiWeaver: Generate Type-Safe C# Clients from OpenAPI at Compile Time with Source Generators

📰 Dev.to · Tatsuro Shibamura

Generate type-safe C# clients from OpenAPI at compile time with OpenApiWeaver

intermediate Published 10 Apr 2026
Action Steps
  1. Install OpenApiWeaver NuGet package
  2. Configure OpenApiWeaver to generate C# clients from OpenAPI definitions
  3. Use the generated clients in your C# application
  4. Test the generated clients to ensure they work as expected
  5. Integrate OpenApiWeaver into your CI/CD pipeline for automated client generation
Who Needs to Know This

Backend developers and API designers can benefit from using OpenApiWeaver to streamline their workflow and improve code quality. This tool is particularly useful for teams working with OpenAPI definitions and C# clients.

Key Insight

💡 OpenApiWeaver uses source generators to generate type-safe C# clients from OpenAPI definitions at compile time, reducing errors and improving code quality.

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🚀 Generate type-safe C# clients from OpenAPI at compile time with OpenApiWeaver! 🚀

Key Takeaways

Generate type-safe C# clients from OpenAPI at compile time with OpenApiWeaver

Full Article

TL;DR I built OpenApiWeaver, a C# library that generates HTTP clients from OpenAPI...
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