{"name":"Fern: Generate Type-Safe SDKs and API Documentation from OpenAPI","description":"Fern is a powerful platform that streamlines API development by transforming your API definitions into production-ready SDKs and comprehensive documentation. It supports various API specifications, including OpenAPI, and offers multi-language SDKs, interactive developer documentation, and AI-powered search. This tool significantly enhances the developer experience by automating crucial parts of the API lifecycle.","github":"https://github.com/fern-api/fern","url":"https://osrepos.com/repo/fern-api-fern","source":"osrepos.com","sourceDescription":"This repository profile is provided by osrepos.com, an open source repository discovery platform.","repositoryProfile":"https://osrepos.com/repo/fern-api-fern","generatedFor":"open source discovery and AI-assisted research","markdown":"https://osrepos.com/repo/fern-api-fern.md","json":"https://osrepos.com/repo/fern-api-fern.json","topics":["api","docs-as-code","docs-generator","openapi","sdk-generator","TypeScript","API Development"],"keywords":["api","docs-as-code","docs-generator","openapi","sdk-generator","TypeScript","API Development"],"stars":null,"summary":"Fern is a powerful platform that streamlines API development by transforming your API definitions into production-ready SDKs and comprehensive documentation. It supports various API specifications, including OpenAPI, and offers multi-language SDKs, interactive developer documentation, and AI-powered search. This tool significantly enhances the developer experience by automating crucial parts of the API lifecycle.","content":"## Introduction\nFern is an innovative platform designed to simplify the process of creating and maintaining API SDKs and documentation. By taking your API definitions, such as OpenAPI, it automatically generates type-safe SDKs in multiple programming languages and beautiful, interactive developer documentation. This automation helps teams deliver a consistent and high-quality developer experience for their APIs.\n\n## Installation\nGetting started with Fern is straightforward. You'll need Node 18+ installed.\n\nFirst, install the Fern CLI globally:\nbash\nnpm install -g fern-api\n\n\nNext, initialize Fern with your OpenAPI specification. You can point to a local file or a URL:\nbash\nfern init --openapi ./path/to/openapi.yml\n# or\nfern init --openapi https://link.buildwithfern.com/plantstore-openapi\n\nThis command sets up the necessary configuration files in a `fern/` directory.\n\n## Examples\nAfter initializing Fern, you can generate your SDKs and documentation.\n\nTo generate your SDKs, simply run:\nbash\nfern generate\n\nThis command processes your API definition and outputs your SDKs, for example, in `/generated/sdks/typescript`.\n\nFern also excels at building and hosting comprehensive API documentation. You can see examples of documentation built with Fern at:\n*   [elevenlabs.io/docs](https://elevenlabs.io/docs){target=\"_blank\"}\n*   [launchdarkly.com/docs](https://launchdarkly.com/docs/home){target=\"_blank\"}\n*   [docs.hume.ai](https://docs.hume.ai/){target=\"_blank\"}\n\n## Why use Fern?\nFern offers several compelling reasons for API providers to adopt it:\n*   **Multi-language SDKs**: Generate type-safe SDKs in TypeScript, Python, Java, Go, Ruby, PHP, C#, Swift, and Rust, ensuring broad compatibility for your users.\n*   **Automated Documentation**: Produce interactive, feature-rich developer documentation with auto-generated API and SDK references, dark mode, and customizable branding.\n*   **AI Search**: Enhance user experience with an AI assistant trained on your documentation, APIs, and SDKs, providing instant answers to developer questions.\n*   **Broad Specification Support**: Supports leading API specifications including OpenAPI (REST, Webhooks), AsyncAPI (WebSockets), Protobuf (gRPC), and OpenRPC.\n*   **Streamlined Workflow**: Automates the often tedious and error-prone process of SDK and documentation generation, allowing developers to focus on core API logic.\n\n## Links\n*   **GitHub Repository**: [https://github.com/fern-api/fern](https://github.com/fern-api/fern){target=\"_blank\"}\n*   **Official Documentation**: [https://buildwithfern.com/learn/home](https://buildwithfern.com/learn/home){target=\"_blank\"}\n*   **Join the Community on Slack**: [https://buildwithfern.com/slack](https://buildwithfern.com/slack){target=\"_blank\"}","metrics":{"detailViews":3,"githubClicks":5},"dates":{"published":null,"modified":"2026-03-10T08:52:00.000Z"}}