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fern

Instant Docs and SDKs for your API
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Fern SDK and Documentation Platform

Fern helps you elevate your developer experience with two powerful products:

  • SDKs - Automatically generates production-ready SDKs that respect the idioms of each language. We support TypeScript, Python, Go, Java, Ruby, C#, PHP, and Swift, with Rust coming soon.

  • Docs - Creates interactive API documentation that developers actually want to use. Features include AI-powered search and chat, content migration tools, docs-as-code workflows, API key injection, access control (RBAC), and versioning.

Both products work with OpenAPI, AsyncAPI, OpenRPC, gRPC, or our simpler Fern Definition format, and can be deployed in the cloud or self-hosted for enterprise security and compliance requirements.

Join the many companies that have chosen Fern as their preferred solution for SDK generation and API documentation.

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  1. fern fern Public

    Input OpenAPI. Output SDKs and Docs.

    TypeScript 3.4k 268

  2. docs-starter docs-starter Public template

    Publish beautiful documentation from OpenAPI and markdown (MDX)

    MDX 35 14

  3. docs docs Public

    The documentation for Fern (kind of meta, eh?)

    MDX 4 3

  4. fern-mcp-server fern-mcp-server Public

    Model Context Protocol (MCP) server for the Fern API.

    TypeScript 2 1

Repositories

Showing 10 of 52 repositories
  • fern-platform Public

    Beautiful, interactive documentation websites powered by MDX and OpenAPI. Build, deploy, and maintain a developer documentation site.

    fern-api/fern-platform’s past year of commit activity
    TypeScript 43 Apache-2.0 23 0 187 Updated Nov 16, 2025
  • lattice-sdk-javascript Public Forked from anduril/lattice-sdk-javascript

    Anduril's Lattice Javascript SDK

    fern-api/lattice-sdk-javascript’s past year of commit activity
    TypeScript 0 3 0 19 Updated Nov 15, 2025
  • fern Public

    Input OpenAPI. Output SDKs and Docs.

    fern-api/fern’s past year of commit activity
    TypeScript 3,406 Apache-2.0 268 304 (1 issue needs help) 107 Updated Nov 15, 2025
  • docs Public

    The documentation for Fern (kind of meta, eh?)

    fern-api/docs’s past year of commit activity
    MDX 4 Apache-2.0 3 0 13 Updated Nov 15, 2025
  • sphinx-autodoc2-fern Public Forked from sphinx-extensions2/sphinx-autodoc2

    A CLI that automatically generates Fern markdown API documentation for your Python packages.

    fern-api/sphinx-autodoc2-fern’s past year of commit activity
    Python 0 MIT 26 0 0 Updated Nov 14, 2025
  • generator-exec-go Public

    A Go library for progress updates between the Go generator and Fern's remote generation server.

    fern-api/generator-exec-go’s past year of commit activity
    Go 0 MIT 0 0 0 Updated Nov 14, 2025
  • posthog-rs-fern Public Forked from PostHog/posthog-rs
    fern-api/posthog-rs-fern’s past year of commit activity
    Rust 0 MIT 32 0 1 Updated Nov 14, 2025
  • protoc-gen-openapi Public Forked from google/gnostic

    A compiler for APIs described by the OpenAPI Specification with plugins for code generation and other API support tasks.

    fern-api/protoc-gen-openapi’s past year of commit activity
    Go 0 Apache-2.0 288 0 0 Updated Nov 14, 2025
  • docs-starter Public template

    Publish beautiful documentation from OpenAPI and markdown (MDX)

    fern-api/docs-starter’s past year of commit activity
    MDX 35 14 0 3 Updated Nov 13, 2025
  • fastapi-starter Public

    A starter repo for FastAPI + React, using Fern

    fern-api/fastapi-starter’s past year of commit activity
    JavaScript 17 15 1 4 Updated Nov 13, 2025
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