AI features
Your documentation site comes with automatic optimizations for AI tools, plus features you can install to help users find answers and keep your content up to date.
AI credits
AI features are usage-based and consume credits. Every plan includes a monthly credit allowance: Hobby plans get 250 credits, Team plans get 1,000 credits, and Enterprise plans get a custom amount.
Find answers
Your users can ask a question instead of searching for one. Ask Fern answers with citations from your documentation, in your docs, in Slack, or in your own product through the API. Developers reach the same content from the agent they code with.
Build your docs with AI
You can hand your docs to an agent. Fern Agent writes them from inside Fern, opening a pull request with the change you describe. The coding agent you already use writes them too, once Fern’s skill and MCP server teach it how Fern Docs sites are built. Fern also generates realistic API examples from your spec.
Optimize for AI
Your site is automatically optimized for AI tools and search engines. Fern hosts an llms.txt file so LLMs can index your documentation efficiently, serves Markdown instead of HTML to AI agents, and exposes a standards-based API catalog for automated discovery. These features reduce token consumption and help agents process your content faster.