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.
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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.
- CategoryCoding & Development
- Pricing ModelFreemium
- DeploymentCloud
- PlatformsWeb
Fern'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?
Configure: Set up your OpenAPI spec
Generate: Create SDKs and documentation
Deploy: Publish CLI and docs
Optimize: Use AI tools for updates
Fern's Use Cases
- SDK Generation
- API Documentation
- CLI Development
- AI Integration
- Enterprise Security
