# 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 8 languages.** Generated from the same spec that powers your SDKs.
- **API Explorer.** Try the API by executing real requests without leaving your docs. API keys are populated automatically for signed-in users.

## 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

- **Security and access control.** Connect any SAML or OIDC provider and lock pages down by role, team, or plan.
- **Multi-source docs.** Aggregate content from multiple repos into one site, with product and version switching.
- **Self-host.** Run on our managed cloud, or self-host to meet stricter security, networking, and compliance requirements.
- **Localization.** First-class translated content, shipped as part of the rollout.
- **Compliance.** SOC 2 Type II and annual pentests, with reports available for procurement.
- **Support and SLAs.** Uptime SLA, escalation paths, and a dedicated Slack or Teams channel, with 24/7 coverage for critical incidents.

## Trusted by

NVIDIA, ElevenLabs, Adobe, LaunchDarkly, Nominal, Square.

## Next steps

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