Fern

What is Fern?

Fern is a developer-focused platform designed to automate the creation and maintenance of high-quality Software Development Kits (SDKs) and documentation. By importing an API specification like OpenAPI or gRPC, Fern generates clean, idiomatic client libraries for various programming languages. It also produces a fully-featured, SEO-optimized documentation site, enabling companies to provide a superior developer experience and streamline their API-first workflow.

Key Features

• Automated SDK Generation

  Generates idiomatic SDKs for multiple languages including TypeScript, Python, Go, and Java from a single API specification.

• Integrated Documentation Site

  Creates a customizable, version-controlled documentation website with interactive API explorers and a 'docs as code' workflow.

• CI/CD Integration

  Integrates into your release process to automatically update and publish SDKs and documentation whenever the API changes.

• Advanced API Feature Support

  Provides built-in support for complex API patterns such as OAuth 2.0, auto-pagination, server-sent events, and idempotency.

• Customization and Extensibility

  Allows for the addition of custom logic, utility functions, or React components that are preserved across generations.

Use Cases

• Enhancing Developer Experience : API companies can provide developers with high-quality, up-to-date SDKs and documentation, improving API adoption and user satisfaction.
• Improving Engineering Efficiency : Automates the manual process of building and maintaining client libraries, saving significant engineering time and resources.
• Implementing API-First Development : Teams can use the API specification as a single source of truth, ensuring that SDKs, docs, and server implementations remain perfectly synchronized.
• Scaling API Support : Enables companies to offer SDKs in multiple programming languages without needing to hire dedicated, language-specific engineering teams.

FAQs