Welcome to Fern!
Everything you need to build the best developer experience
Your Fern-powered docs site comes with a lot more than pages and styling. Here’s what’s built in.
Point Fern at your OpenAPI spec and get a full, interactive API reference — no manual work required.
Let users make real API calls right from your docs — reduce time to first 200
Auto-generated code examples in TypeScript, Python, Go, and more
Realistic request and response examples created automatically
Customize sections, ordering, and content in your API docs
AI-powered search that answers questions using your docs — not just links
A Slack-based AI agent that updates your documentation via GitHub PRs
Makes your docs readable by AI tools and LLMs — generated automatically
Metadata, slugs, and redirects so your docs rank in search results
Serve docs from your own domain like docs.yourcompany.com
Connect your favorite tools with zero custom code.
Track traffic and user behavior
Product analytics and session replay
In-app support chat for your docs