Fern: Docs, SDKs, and CLIs for APIs

Description

Fern is a comprehensive platform designed to enhance the developer and agent experience by providing tools to generate SDKs, create interactive API documentation, and develop an agent-first CLI. Starting with OpenAPI, Fern allows users to generate SDKs in multiple languages, ensuring that client libraries are designed by language experts. The platform supports modern API protocols such as REST, WebSockets, and GraphQL, making it versatile for various development needs.

One of the standout features of Fern is its ability to manage documentation as code. This allows users to version changes in Git, review with pull requests, and use coding agents to write and update content. The built-in AI chat feature enables users to ask questions and receive answers grounded in the documentation, eliminating hallucinations or generic responses.

Fern also offers a CLI generator that produces a fully functional command-line tool from the same API spec used for SDKs. This CLI is built for AI agents and human developers, providing deterministic output and runtime-introspectable schemas. The CLI generator handles complex tasks such as commands, authentication, pagination, and output formatting automatically.

For organizations with governance, scale, and security requirements, Fern offers an Enterprise plan with tailored pricing terms. This plan includes features such as SSO, SCIM, advanced RBAC, and dedicated infrastructure with self-hosting options. Fern ensures security and compliance with SOC 2 Type II certification and annual penetration tests.

Fern's platform is designed to be enterprise-ready by default, offering security, deployment, and partnership that scale with your API. It allows for the aggregation of content from multiple repositories into a single site, with product and version switching that scales across teams without breaking information architecture. With over 8,000 customers, Fern is trusted by organizations to ship first-class WebSocket SDKs alongside REST from one spec.

Fern: Docs, SDKs, and CLIs for APIs's Core Features

• Generate SDKs in multiple languages

• Interactive API documentation

• Agent-first CLI

• Supports REST, WebSockets, and GraphQL

• Docs as code with Git integration

• Built-in AI chat for documentation

• CLI generator for command-line tools

• Enterprise-ready security and compliance

How to use Fern: Docs, SDKs, and CLIs for APIs?

1. 1

   Configure: Set up your OpenAPI spec

2. 2

   Generate: Create SDKs and documentation

3. 3

   Deploy: Publish CLI and docs

4. 4

   Optimize: Use AI tools for updates

Fern: Docs, SDKs, and CLIs for APIs's Use Cases

• SDK Generation
• API Documentation
• CLI Development
• AI Integration
• Enterprise Security

FAQ from Fern: Docs, SDKs, and CLIs for APIs

• What is Fern used for?

  Fern is used to generate SDKs, create interactive API documentation, and develop an agent-first CLI from an OpenAPI spec.

• Does Fern support multiple languages?

  Yes, Fern generates SDKs in multiple languages, designed by language experts.

• What API protocols does Fern support?

  Fern supports modern API protocols including REST, WebSockets, and GraphQL.

• Can Fern manage documentation as code?

  Yes, Fern allows you to manage documentation like code, with versioning and Git integration.

• What security features does Fern offer?

  Fern offers enterprise-ready security with SOC 2 Type II compliance and advanced RBAC.

• How does Fern integrate AI into documentation?

  Fern integrates AI with built-in chat features and AI-assisted authoring for documentation.

• What is the Fern CLI generator?

  The Fern CLI generator creates a command-line tool from your API spec, built for AI agents and developers.

• What are the pricing options for Fern?

  Fern offers a Free plan and an Enterprise plan with tailored pricing for organizations with specific requirements.