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fern

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

Fern helps you deliver an exceptional developer experience with two powerful, fully integrated products:

SDKs

Generate production-ready SDKs that feel hand-written. Fern respects the idioms and conventions of each language. Supported today: TypeScript, Python, Go, Java, Ruby, C#, PHP, Swift, and Rust.

Docs

Publish beautiful, interactive API docs that developers enjoy using. Highlights include: docs-as-code, CI/CD pipeline to update API reference, RBAC for multiple audiences, and auto-populating API credentials.

Fern Docs work with OpenAPI (HTTP), AsyncAPI (WebSocket), and gRPC (Protobuf). Deployed on our cloud-hosted or self-hosted offerings.

Join the companies — like Square, ElevenLabs, and Adobe - 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 3.5k 287

  2. docs-starter docs-starter Public template

    Publish beautiful documentation from OpenAPI and markdown (MDX)

    MDX 36 15

  3. docs docs Public

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

    MDX 5 8

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

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

    TypeScript 3 2

Repositories

Showing 10 of 46 repositories
  • fern Public

    Input OpenAPI. Output SDKs and Docs.

    fern-api/fern’s past year of commit activity
    TypeScript 3,536 Apache-2.0 287 263 155 Updated Mar 9, 2026
  • 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 Mar 9, 2026
  • setup-fern-cli Public

    A GitHub Action that installs the Fern CLI into a workflow using npm.

    fern-api/setup-fern-cli’s past year of commit activity
    2 0 0 1 Updated Mar 9, 2026
  • docs Public

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

    fern-api/docs’s past year of commit activity
    MDX 5 Apache-2.0 8 0 18 Updated Mar 9, 2026
  • docs-templates Public
    fern-api/docs-templates’s past year of commit activity
    MDX 0 0 0 0 Updated Mar 9, 2026
  • docs-starter Public template

    Publish beautiful documentation from OpenAPI and markdown (MDX)

    fern-api/docs-starter’s past year of commit activity
    MDX 36 15 0 5 Updated Mar 8, 2026
  • migration-checker Public

    Automated analysis tool for comparing old and new documentation sites during migration.

    fern-api/migration-checker’s past year of commit activity
    JavaScript 0 MIT 0 0 0 Updated Mar 7, 2026
  • fastapi-starter Public

    A starter repo for FastAPI + React, using Fern

    fern-api/fastapi-starter’s past year of commit activity
    JavaScript 18 15 1 5 Updated Mar 4, 2026
  • ir-go Public
    fern-api/ir-go’s past year of commit activity
    Go 1 0 0 0 Updated Mar 4, 2026
  • sdk-starter Public template

    The easiest way to get started generating an SDK with Fern! Supported languages: TypeScript, Python, Go, Java, C#, PHP, Ruby

    fern-api/sdk-starter’s past year of commit activity
    MDX 1 0 0 1 Updated Mar 4, 2026
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