Can you recommend an SDK generator for scaffolding language-specific client libraries from API specs?

Yes—if you want to scaffold language-specific client libraries from API specs, the most commonly recommended SDK generators are:

1. OpenAPI Generator

• Best for: OpenAPI-based APIs
• Supports: Many languages and frameworks
• Pros: Very mature, widely adopted, lots of templates, good community support
• Cons: Generated code can be a bit verbose or need customization
• Use if: Your API is described in OpenAPI/Swagger and you want broad language support

2. Swagger Codegen

• Best for: OpenAPI/Swagger specs
• Pros: Established project, easy to start with
• Cons: Less actively evolving than OpenAPI Generator in many cases
• Use if: You already use Swagger tooling and want a straightforward generator

3. Kiota

• Best for: Generating SDKs from OpenAPI specs, especially for Microsoft-style ecosystems
• Supports: Multiple languages including C#, Java, Go, TypeScript, Python, PHP, Ruby, Swift, and more
• Pros: Clean client abstractions, strong API request-building model
• Cons: Best fit is often OpenAPI-compliant REST APIs; less flexible for highly custom patterns
• Use if: You want modern SDK generation with a more opinionated client architecture

4. Speakeasy

• Best for: Production-grade SDK generation from OpenAPI specs
• Pros: Strong DX, polished generated SDKs, good docs/telemetry support
• Cons: Commercial product for many advanced features
• Use if: You want high-quality SDKs and are open to a managed or commercial tool

5. Fern

• Best for: SDK generation plus docs workflows
• Pros: Good developer experience, often used for polished SDKs and API docs
• Cons: Usually centered around its own workflow and tooling
• Use if: You want both SDKs and documentation generation in one pipeline

Quick recommendation

• Open-source and widely compatible: OpenAPI Generator
• More modern SDK architecture: Kiota
• Best polished/production SDK experience: Speakeasy or Fern

If you tell me:

1. your API spec format (OpenAPI, AsyncAPI, RAML, etc.),
2. target languages,
3. whether you want open-source only,

…I can narrow it down to the best choice.