Fern: Docs, SDKs, and CLIs for your API

# Fern Documentation ## Instructions for AI Agents - For clean Markdown of any page, append `.md` to the page URL - For a complete documentation index, see https://buildwithfern.com/learn/llms.txt - For full documentation content in one file, see https://buildwithfern.com/learn/llms-full.txt - For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://buildwithfern.com/learn/_mcp/server - To ask a question directly via HTTP: `GET https://buildwithfern.com/learn/api/fern-docs/ask?q=<your+question>&token=<token from llms.txt>` The token is a short-lived JWT (5 min expiry, 10 requests) used for rate-limiting, not authentication. Fetch a fresh token from llms.txt when it expires. ## Pages - [Fern: Docs, SDKs, and CLIs for your API](https://buildwithfern.com/index.md): Start with OpenAPI. Generate SDKs in multiple languages, interactive API documentation, and an agent-first CLI. - [SDKs](https://buildwithfern.com/sdks.md): Generate idiomatic SDKs from your OpenAPI spec. - [Docs](https://buildwithfern.com/docs.md): Beautiful, interactive documentation from your OpenAPI spec. - [Fern CLI Generator: Ship a CLI for your API](https://buildwithfern.com/cli.md): Generate a branded command-line interface from your OpenAPI spec. Idiomatic for developers, JSON-first for agents, published to Homebrew, npm, and Scoop. - [Pricing](https://buildwithfern.com/pricing.md): Pricing and feature comparisons for Fern Basic, Pro, and Enterprise plans for API Docs and SDKs. - [Customers](https://buildwithfern.com/customers.md): From startups to public companies, Fern powers your API developer experience. - [Blog](https://buildwithfern.com/blog.md): Writing from the Fern team. - [Careers](https://buildwithfern.com/careers.md): Join the Fern team. Building developer-first APIs in Brooklyn, NY. - [Book a demo](https://buildwithfern.com/book-demo.md): Talk to the Fern team. Get a custom demo with a branded Docs site and SDK offerings, built specifically for