For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
Book a demoLog inStart for free
  • Getting started
    • Overview
    • How it works
    • Quickstart
    • Project structure
    • Customer showcase
    • Changelog
  • Configuration
    • Overview
    • Site-level settings
    • Page-level settings
  • Writing content
    • Markdown basics
    • Rich media in Markdown
    • Fern Editor
    • Reusable snippets
  • AI features
    • Overview
    • Fern Writer
    • AI-generated examples
    • Markdown access
      • Overview
      • Customize LLM output
      • Agent directives
      • Analytics and integration
    • MCP server
    • API catalog discovery
      • Overview
        • Overview
  • Public API
    • GETJWT from Fern API key
    • GETAlgolia search credentials
    • GETCurrent user information
  • Fern Writer API
    • GETGet Fern Writer Install Link
Checking status...
SOC2Soc 2 Type II
© 2026 Fern • Birch Solutions, Inc., a Postman company

Documentation

SDKsDocsAsk FernCLI Reference

API Definitions

OpenAPIAsyncAPIOpenRPCgRPC

Resources

BlogSupportPricing

Company

Brand KitPrivacy PolicyTerms of Service
LogoLogo
Book a demoLog inStart for free
On this page
  • Authentication
AI featuresAsk FernAPI reference

Introduction

Welcome to the Fern API Reference.
||View as Markdown|
Was this page helpful?
Edit this page
Previous

Standalone search widget

Next

Post Chat Completion

Team and Enterprise feature

This feature is available only for the Team and Enterprise plans. To get started, reach out to support@buildwithfern.com.

The Fern AI API allows you to manage your Ask Fern configuration using Fern’s public RESTful API. You can use the API to:

  • Build your own support integrations that leverage Ask Fern’s AI-powered search
  • Add custom context and FAQs to your documentation
  • Source usage and analytics data from your Ask Fern instances

Authentication

Fern API requests require a bearer token for authentication. Use the CLI command fern token to generate a bearer token. Tokens don’t expire.