Is AutoRest still being maintained in 2025?

No, AutoRest is deprecated and will be retired on July 1, 2026, with no active development or new features. Microsoft recommends switching to TypeSpec for ongoing projects.

How to generate a C# client with AutoRest?

Use the @autorest/csharp package with an OpenAPI spec file. However, due to deprecation, it's advisable to migrate to TypeSpec or use alternatives like OpenAPI Generator for long-term support.

AutoRest vs OpenAPI Generator: which is better now?

Since AutoRest is deprecated, OpenAPI Generator is a better choice for new projects as it's actively maintained and supports more languages. AutoRest was historically strong for Azure integrations, but TypeSpec is its modern replacement.

What is TypeSpec and why replace AutoRest with it?

TypeSpec is a modern API description language and code generation platform recommended by Microsoft. It offers improved design-time experiences and active development, whereas AutoRest is legacy and unsupported.

How to migrate from AutoRest to TypeSpec?

Start by converting your OpenAPI specs to TypeSpec definitions using Microsoft's migration guides. Expect manual adjustments since TypeSpec uses a different syntax and may require code regeneration.

Can AutoRest handle OpenAPI 3.0 specifications?

Yes, AutoRest supports OpenAPI 2.0 and 3.0, but due to deprecation, it may not support newer features or versions. Check the documentation for specifics, but consider switching for future-proofing.

Open-Awesome

autorest

MITTypeSpec2.0.4222

Generates client libraries for RESTful web services from OpenAPI specifications.

GitHub

4.8k stars738 forks0 contributors

What is autorest?

AutoRest is a code generation tool that creates client libraries for accessing RESTful web services. It takes an OpenAPI Specification as input and automatically produces SDKs in various programming languages, solving the problem of manually writing API client code.

Target Audience

Developers and teams building or consuming REST APIs who need consistent, generated client SDKs in languages like C#, Java, Python, or TypeScript.

Value Proposition

It saves significant development time by automating client library generation, ensures consistency with the API specification, and supports a wide range of programming languages through its extensible architecture.

Overview

OpenAPI (f.k.a Swagger) Specification code generator. Supports C#, PowerShell, Go, Java, Node.js, TypeScript, Python

Use Cases

Best For

Generating TypeScript clients for a Node.js backend API
Creating a C# SDK for a .NET application consuming a REST service
Automating Python client library generation from an OpenAPI spec
Building consistent Java clients for microservices architectures
Producing PowerShell modules for Azure REST API management
Swift client generation for iOS/macOS apps interacting with web APIs

Not Ideal For

New projects initiated after the deprecation announcement
Teams requiring active maintenance and modern OpenAPI 3.1+ support
Organizations prioritizing long-term, vendor-backed tooling over legacy solutions

Pros & Cons

Pros

Multi-Language SDK Generation

Automatically produces client libraries for eight languages including C#, Java, Python, and TypeScript, as detailed in the README's package list, saving significant manual coding effort.

OpenAPI Standards Compliance

Uses standard OpenAPI specifications as input, ensuring generated code aligns with widely adopted API description formats for consistency.

Extensible Plugin Architecture

Features a plugin system allowing custom generators and extensions, enabling tailored workflows for specific code generation needs.

Cons

Deprecated and Unmaintained

The README states AutoRest is deprecated with retirement set for July 2026, meaning no new features, bug fixes, or official support, making it risky for production use.

Migration Burden to TypeSpec

Microsoft recommends TypeSpec as the successor, but migrating requires learning a new API description language and potentially rewriting specs, adding overhead.

Stagnant Ecosystem

With no active development, community contributions and third-party plugins have likely dwindled, limiting adaptability to new tools or frameworks.

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