Revamping our website
Investing in the future of developer and agent experience tooling.
Danny Sheridan
ProductIntroducing Fern Replay
Replay reapplies SDK customizations on top of every regeneration, automatically. Available across all SDK languages.
Tanmay Singh
EducationalMigrate from Stainless today
Compare Fern vs Stainless SDK generators in January 2026. Fern offers 9+ languages, WebSockets, gRPC, CLI workflow, and on-premise deployment vs Stainless dashboard approach.
Alex McKinney
CompanyHow I'm making our documentation agent-friendly (and how I'm not)
Writing docs that AI agents can actually use means doing content work and relying on platform scaffolding. Here's what I do, and what I can't.
Devin Logan
ProductWe built a CLI generator for agents and humans
Generate a CLI from the same API spec that powers your Fern Docs and SDKs. Now in early access.
Alex McKinney
CompanyFrom Fern customer to Fern contributor
Barry previously worked at Square for four and a half years, starting on the public-facing GraphQL API platform for external developers. Over time, he moved into the SDK pipeline, which is how he started working with Fern.
Barry Zou
CompanyHow we built Agent Score to improve Fern Docs
Fern built a Lighthouse-style benchmark for AI-agent readiness, ran it on our own docs, and shipped the fixes in public. Here's what we found.
Kapil Gowru
CompanyWhy I keep rebuilding the same docs pages
Fern's technical writer, Devin, maintains 500+ pages of documentation for Fern Docs and SDKs, with new features shipping daily. Every time a page needs updating, the content is the obvious part — the components underneath it are the editorial decision most writers don't revisit.
Devin Logan
CompanyThe AI-assisted solo technical writer
Fern’s technical writer, Devin, uses AI tools to ship 20,000 new lines of documentation per month about Fern, an open source tool that generates API documentation and SDKs.
Devin Logan
ProductSweating the small stuff in Fern Docs
Frontend engineer Sarah shares six UI fixes that improved Fern Docs, from smooth arrow animations to flickering sidebar icons. Small transitions matter when developers are trying to focus on your API.
Sarah Bawabe
ProductFern's Rust SDK generator
Generate production-ready Rust client libraries from your API spec, built for performance-critical applications.
Devin Logan
CompanyFrom Fern Customer to Fern Engineer
Sandeep joined Fern as an engineer in Nov '25 after being a Fern customer. He walks you through the conviction you need to make that jump.
Sandeep Dinesh
EducationalDocumentation Maintenance Guide November 2025
Learn documentation maintenance best practices for November 2025. Automate API docs, reduce maintenance costs, and keep developer documentation current with proven strategies.
Nathan Lian
CompanyDelivering world-class developer experiences with Postman
We’re excited to share that Fern has joined Postman. Together, we'll help teams deliver better APIs and better developer experiences. Fern will continue to operate as an independent product.
Danny Sheridan
EducationalAI Agents for Technical Writing (January 2026)
Learn how AI agents like Devin, Cursor, and Claude Code automate technical writing in January 2026. Compare features, workflows, and style enforcement for docs.
Nathan Lian
EducationalDeveloper docs metrics that matter Jan 2026
Learn which developer documentation metrics actually matter in January 2026. Track time-to-first-API-call, zero-result searches, AI bot traffic, and analytics that improve API adoption.
Nathan Lian
EducationalAPI Docs & SDK Generation Tools (May 2026) | Fern
Compare API documentation platforms that generate SDKs in May 2026. Fern, Speakeasy, Stainless, ReadMe, and more - find tools that automate client libraries and docs.
Nathan Lian
EducationalMCP Servers for Documentation Sites April 2026 | Fern
Learn why MCP servers matter for API documentation sites in April 2026. Understand how they make your docs AI-accessible for Claude, Cursor, and other AI coding assistants developers use daily.
Nathan Lian
EducationalOpen Source vs Closed Source SDK Generators 2025
Compare open source, closed source, and open-core SDK generation platforms in December 2025. Learn about OpenAPI Generator, Speakeasy, Stainless, and Fern for API SDKs.
Nathan Lian
EducationalRBAC Guide: Role-Based Access Control December 2025
Learn how RBAC (Role-Based Access Control) secures documentation portals and APIs by granting access based on user roles. Complete implementation guide December 2025.
Nathan Lian
ProductIntroducing Fern Autorelease: hands-off SDK releases
Fern Autorelease automatically detects updates to your API specification, regenerates SDKs, determines version bumps, and publishes new packages.
Devin Logan
EducationalFern vs Mintlify: Which API Tool Wins (2026)
Compare Fern vs Mintlify for API documentation and SDK generation in January 2026. Learn which tool offers better client libraries, self-hosting, and access control.
Nathan Lian
EducationalOpenAPI code generation for enterprise (Nov 2025)
Compare the best OpenAPI code generation platforms for enterprise teams in November 2025. Learn about SDK generation, breaking change detection, and compliance features.
Nathan Lian
EducationalOn-prem hosting security benefits November 2025
Learn why enterprises choose on-prem hosting for API documentation and SDK generation. Security, compliance, and cost benefits explained for November 2025.
Nathan Lian
EducationalBest API documentation chat tools May 2026 | Fern
Compare the best conversational API documentation platforms in May 2026. AI-powered chat interfaces help developers find answers instantly with citations.
Nathan Lian
ProductIntroducing the Fern Editor - Edit Developer Docs in the Browser, Powered by Git
The Fern Editor makes writing developer documentation accessible to everyone. Non-technical teammates can edit docs in the browser while developers keep Git-backed workflows for review and version control.
Sarah Bawabe
ProductImproved developer docs Agents: Full API specs, traffic analytics, & markdown for LLMs
See how Fern's improved llms.txt support helps you serve complete API specifications, track AI bot traffic, and reduce token costs by 90% with automatic Markdown serving.
Devin Logan
ShowcaseMultiple products, one docs site: Webflow case study
See how Webflow scaled from one to five products with a single docs site using Fern's product switcher. Real documentation example with implementation details.
Ryan Tish
ProductFern's Swift SDK Generator: Build idiomatic iOS client libraries
Fern’s Swift SDK generator is live. Instantly provide iOS developers with an idiomatic Swift client for your API.
Ryan Tish
ProductAsk Fern now sits in your documentation's sidebar
Three improvements to Ask Fern, the AI assistant for documentation.
Ryan Tish
ProductWhy we’re launching Fern Self-Hosted Docs and SDKs
Fern Self-Hosted Docs and SDKs lets enterprises deploy on their own infrastructure, delivering a best-in-class developer experience with the security and compliance they require.
Ryan Tish
ShowcaseInternal documentation at scale: SPS Commerce case study
Learn how SPS Commerce built out an internal documentation platform with Fern, allowing their developer team to improve productivity, reduce operational risk, and accelerate delivery.
Travis Gosselin
StrategyWhy documentation is now the most important part of your API
Developer docs are taking off. But why? We dive into the key tailwinds—from the rise of APIs and microservices to the surprising new role docs are playing in an agent-powered world.
Ryan Tish
StrategyDocs-as-code: What is it, how it works, and ways to start
Learn about the history of docs-as-code tooling and how it will play a part in the future of AI-powered documentation.
Jesse Sumrak
ShowcaseHow Payabli reduced API docs maintenance by 80% with Fern
Payabli's documentation team reduced API specification management from ~30% to ~5% of their total effort—an 80% reduction that freed them to focus on creating better developer experiences.
Casey Smith
StrategyHow to generate a TypeScript SDK for your API spec
Learn how to deliver a TypeScript SDK that’s lightweight, fully type-safe, and works across all JavaScript runtimes with Fern.
Niels Swimberghe
StrategyHow we built the Fern site, an honest-take
It’s not just a website — it’s a testament to how much we care about craft at Fern.
Kapil Gowru
CompanyFern raises a Series A to meet the growing demand for SDKs and API Docs
Today we’re announcing our $9M Series A, led by Bessemer Venture Partners with participation from Y Combinator, bringing our total funding to $13M.
Danny Sheridan
ProductAnnouncing WebSocket Support with AsyncAPI v3
With full AsyncAPI support in Fern SDKs and Docs, you can now document your WebSocket endpoints with ease. You can add AsyncAPI next to your OpenAPI for a complete API reference.
Danny Sheridan
ShowcaseThe first autogenerated SDK with gRPC and REST
Fern breaks new ground by launching the first generated SDK supporting both gRPC and REST in a single package. Partnering with Pinecone, they delivered an idiomatic C# SDK that streamlines development by combining performant gRPC data operations with REST-based control features, now integrated into Microsoft's Semantic Kernel.
Alex McKinney
ShowcaseFrom handwritten to generated—Cohere's SDK journey
Cohere partnered with Fern to transform their SDK development from manual TypeScript and Go implementations to automated generation. By centralizing their API spec and leveraging Fern's language-specific code generation, Cohere eliminated SDK maintenance overhead while delivering idiomatic features like TypeScript's discriminated unions and Go's context primitives, reducing GitHub issue resolution time from months to days.
Niels Swimberghe
ShowcaseHow Merge uses Fern to ship SDKs
Merge streamlined their SDK development by switching from OpenAPI to Fern, enabling cleaner APIs and automated workflows across six programming languages. The rapid 4-week implementation delivered enhanced documentation and compatibility, earning praise from developers for its simplified integration process.
Niels Swimberghe
ShowcaseHow Candid sped up API development by 50% by going schema first
Fern transforms API development at Candid by centralizing API definitions in YAML and automating code generation. This eliminates manual boilerplate across backend (95,000 lines) and frontend (30,000 lines), ensuring consistency between Pydantic models, FastAPI routes, TypeScript clients, and upcoming documentation. The schema-first approach prevents drift bugs through a single source of truth, with plans to extend into customer-facing SDKs.
Deep Singhvi
Different types of APIs guide (April 2026)
EducationalAdd AI chat to documentation (April 2026)
EducationalAPI docs for non-technical users (April 2026)
EducationalVisual editors for technical docs (April 2026)
EducationalFern vs ReadMe: Which is better? (April 2026)
EducationalHow to build an API: Complete guide April 2026
EducationalWhat Is an API Endpoint? Guide April 2026
EducationalAPI design best practices guide (March 2026)
EducationalAPI development guide [March 2026]
EducationalAPI Testing Guide for Developers 2026
EducationalPrepare APIs for AI agents - March 2026
EducationalAPI docs with MDX & components (March 2026)
EducationalBest API docs for enterprise security March 2026
EducationalWrite LLM-friendly docs in March 2026
EducationalAPI documentation platforms WYSIWYG March 2026
EducationalAPI documentation best practices guide Feb 2026
EducationalAPI docs with Git integration (Feb 2026)
EducationalAPI Docs for AI & ML Companies Feb 2026
EducationalDocs-as-Code Needs Client Libraries (Feb 2026)
EducationalInfo Architecture for Docs: February 2026
EducationalAPI Docs for AI Agents: llms.txt Guide May 2026 | Fern
EducationalAPI Docs Platforms: Style Guide Enforcement 2026
EducationalGenerated vs manual docs: Jan 2026 guide
EducationalGitBook Reviews & Alternatives (February 2026)
EducationalStainless vs GitBook vs Speakeasy (Jan 2026)
EducationalEvergreen SDKs Developer Guide (January 2026)
EducationalSelf-Hosted Documentation Tools January 2026
EducationalDocs Linting Guide - January 2026
EducationalAPI Developer Portals for Enterprise (Jan 2026)
EducationalDocs-as-Code Solutions for APIs | January 2026
EducationalStainless Pricing & Alternatives (January 2026)
EducationalBest llms.txt Platforms January 2026
EducationalFern vs Speakeasy SDK Generator (May 2026) | Fern
EducationalInteractive API Docs with Live Testing Dec 2025
EducationalAPI-First Development Platforms January 2026
EducationalMulti-Audience API Platforms (December 2025)
EducationalBest SDK generation tools 2026 | Multi-language APIs | Fern
Educational