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fern

Instant Docs and SDKs for your API

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 13

  3. docs docs Public

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

    MDX 3 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 22 0 142 Updated Nov 4, 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 25 0 0 Updated Nov 4, 2025
  • fern Public

    Input OpenAPI. Output SDKs and Docs.

    fern-api/fern’s past year of commit activity
    TypeScript 3,389 Apache-2.0 268 298 (1 issue needs help) 56 Updated Nov 4, 2025
  • docs Public

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

    fern-api/docs’s past year of commit activity
    MDX 3 Apache-2.0 3 7 86 Updated Nov 4, 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 5 Updated Nov 3, 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 13 0 3 Updated Nov 3, 2025
  • group-seed-tests Public

    Repo for GitHub Action to package seed tests

    fern-api/group-seed-tests’s past year of commit activity
    TypeScript 0 MIT 0 0 5 Updated Nov 3, 2025
  • generator-cli-go Public

    The Go library used to call Fern's generator-cli

    fern-api/generator-cli-go’s past year of commit activity
    Go 0 0 0 0 Updated Nov 3, 2025
  • fern-api/fern-autopilot’s past year of commit activity
    TypeScript 0 0 0 2 Updated Nov 3, 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 3, 2025

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