# Docs

Beautiful, interactive documentation from your OpenAPI spec.

## What you get

- **Auto-generated API reference.** Every endpoint, parameter, and schema rendered from your spec.
- **MDX for prose.** Write guides, tutorials, and conceptual content in MDX with full component support.
- **Versioning.** Multiple API versions side-by-side with stable URLs.
- **Search.** Fast, typo-tolerant search across reference and prose.
- **Themes.** Match your brand. Light and dark out of the box.
- **Code samples in 9 languages.** Generated from the same spec that powers your SDKs.
- **Try-it console.** Run API calls directly from the docs with auth pre-filled.

## Built for AI agents

- **MCP server.** Expose your docs and API to Claude, Cursor, and other MCP-compatible clients.
- **Ask Fern.** Conversational search grounded in your docs.
- **llms.txt.** Auto-generated index and full-text feed for LLM consumption.
- **Markdown variants.** Append .md to any docs URL for a clean Markdown rendering.

## Authoring

- Write content in MDX, version it in Git.
- Preview every change in a hosted preview deployment.
- CI checks for broken links, malformed frontmatter, and snippet drift.

## Publishing

- Custom domain (CNAME to Fern's edge).
- Versioned releases with rollback.
- Automated regeneration on spec or content changes.

## Enterprise features

- SOC 2 Type II.
- 99.9% uptime SLA.
- SSO/SAML.
- Audit logs.
- Branded enterprise developer portals.

## Trusted by

NVIDIA, Adobe, ElevenLabs, Twilio, Cohere, OpenRouter, Square.

## Next steps

- Book a demo: <https://buildwithfern.com/book-demo>
- See pricing: <https://buildwithfern.com/pricing>
- Read customer stories: <https://buildwithfern.com/customers>