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Fern Docs

Fern Docs builds hosted developer documentation from Markdown and API specifications, with editing, search, API references, and AI features.

Fern Docs

Fern Docs combines Markdown, API specifications, and configuration into published documentation websites. It supports API references, interactive API explorers, changelogs, search, custom domains, localization, analytics, and machine-readable content for AI tools.

Teams can edit through Git and pull requests, the Fern Editor, CLI, Slack, or connected coding agents. The Free plan includes limits on members, pages, AI credits, and page generations; Enterprise adds custom pricing, advanced access controls, multiple repositories, self-hosting, and dedicated support.

Features

  • Generate API references from OpenAPI, AsyncAPI, gRPC, GraphQL, and OpenRPC
  • Write and publish Markdown and MDX guides with reusable components
  • Provide interactive API Explorer pages with prefilled authentication
  • Edit documentation in the browser with Fern Editor and pull requests
  • Expose documentation through Markdown pages, /llms.txt, and an MCP server
  • Add AI search, Fern Agent, AI-generated examples, and AI translations
  • Manage versions, products, changelogs, custom domains, and localization
  • Use analytics, role-based access control, SSO, and self-hosting on Enterprise

Use cases

  • Publish API references and integration guides from an existing API specification
  • Review documentation changes through GitHub pull requests and CI
  • Let non-technical teammates edit documentation in a browser
  • Help developers find answers with search, Ask Fern, and API Explorer
  • Serve documentation to coding agents through Markdown, /llms.txt, and MCP
  • Host versioned, localized, authenticated documentation for multiple products

Pros

    Cons

      Pricing

      Starting price
      Free
      Pricing checked
      2026-09-19

      Free

      $0/mo

      • 10 team members
      • 1,000 pages
      • 250 AI credits per month
      • 2,000 page generations per month
      • Custom domain and subpath
      • Guides, API references, and changelogs
      • API explorer and web editor
      • Ask Fern, Fern Agent, and MCP server

      Enterprise

      Custom

      • Everything in Free
      • SSO, SCIM, and advanced RBAC
      • Multiple repos and docs instances
      • Custom CSS, JavaScript, and React components
      • Custom layouts and design-system integration
      • Advanced analytics and data exports
      • Dedicated infrastructure, with self-hosting available
      • Uptime SLA, dedicated support, and enterprise MSA
      Official website