---
name: Fern
slug: fern
domain: buildwithfern.com
description: Platform for generating SDKs and API documentation from OpenAPI or its own spec, producing typed client libraries and a hosted docs site.
category: developer-tools
sources: 1
total_releases: 89
releases_last_30d: 3
avg_releases_per_week: 1.9
last_updated: 2026-06-04
tracking_since: 2024-01-24
canonical: https://releases.sh/fern
overview_url: https://releases.sh/fern/overview.md
accounts:
  github: "fern-api"
  x: "buildwithfern"
---

## Overview

Several docs-platform and AI-agent improvements shipped across April and May 2026.

**Search scoped to product or version** landed with a new `settings.search` object in `docs.yml`. Two modes are available: `prioritize-current-product` boosts results from the active product without hiding others, while `default-filter-by-current-product` auto-applies a facet filter so only that product's results appear by default.

**AI agents now receive full API examples in Markdown** output. Interactive components like `<EndpointRequestSnippet>` and `<RunnableEndpoint>` render as fenced code blocks in `.md` URLs, `llms.txt`, and `llms-full.txt`, closing the gap between the rendered page and machine-readable representations.

**A live link checker joined the CLI.** `fern docs link check` scrapes every published page and reports broken and blocked URLs with the source pages where they appear — catching live 404s that local YAML validation misses.

**Multi-source docs and custom `robots.txt`** arrived together. Teams can now publish independently to sub-paths of a shared custom domain, and authors can serve their own `robots.txt` to control AI crawler access per section.

**API catalog discovery** via the standards-based `/.well-known/api-catalog` endpoint lets MCP clients and catalog crawlers find APIs automatically from the navigation tree.

**The `<Prompt>` component** added support for arbitrary URL actions, extending beyond Cursor, Claude, and ChatGPT to any AI tool. Global themes, per-page agent directives, custom `llms.txt` files, and a standalone search widget rounded out the AI-integration work. Preview-deployment cleanup workflows for both GitHub Actions and GitLab CI also shipped, removing stale previews automatically on merge.


<Source name="Changelog" slug="fern-changelog" type="feed" releases="89" latest-date="2026-05-28T00:00:00.000Z" primary="true" url="https://releases.sh/fern/fern-changelog" />

## Recent Releases

_Summaries below — fetch the release's `canonical` URL for full content, or `url` for the original source._

<Release source="fern-changelog" date="May 28, 2026" published="2026-05-28T00:00:00.000Z" url="https://buildwithfern.com/learn/docs/changelog/2026/5/28" canonical="https://releases.sh/release/rel_9yN4MLIUw0jSV5MHrdu2j" truncated="true">
### May 28, 2026

## Scope search by product or version

You can now control how search results are ranked and filtered for sites with multiple products or versions usi...
</Release>

<Release source="fern-changelog" date="May 19, 2026" published="2026-05-19T00:00:00.000Z" url="https://buildwithfern.com/learn/docs/changelog/2026/5/19" canonical="https://releases.sh/release/rel_7Fd7OcI-6eBiBV9-TohWt" truncated="true">
### May 19, 2026

## Markdown rendering for API components

Interactive API components now render as fenced code blocks and structured content in your site's Markdown o...
</Release>

<Release source="fern-changelog" date="May 14, 2026" published="2026-05-14T00:00:00.000Z" url="https://buildwithfern.com/learn/docs/changelog/2026/5/14" canonical="https://releases.sh/release/rel_2NwW4TzCYaTuyFRrFNXTd" truncated="true">
### May 14, 2026

## CLI link checker

You can now check for broken links on your live documentation site directly from the Fern CLI with `fern docs link check`. The co...
</Release>

<Release source="fern-changelog" date="May 4, 2026" published="2026-05-04T00:00:00.000Z" url="https://buildwithfern.com/learn/docs/changelog/2026/5/4" canonical="https://releases.sh/release/rel_L-god97dA0XrxVU7qnRe6" truncated="true">
### May 4, 2026

## Custom robots.txt

You can now serve your own [`robots.txt`](/learn/docs/seo/robots-txt) at the root of your documentation site by pointing `agents...
</Release>

<Release source="fern-changelog" date="May 1, 2026" published="2026-05-01T00:00:00.000Z" url="https://buildwithfern.com/learn/docs/changelog/2026/5/1" canonical="https://releases.sh/release/rel_ZlquJWxuCwkrZGTIdtMXz" truncated="true">
### May 1, 2026

## API catalog discovery

AI agents, MCP clients, and API catalog crawlers can now discover your APIs automatically. Every Fern Docs site exposes a st...
</Release>

<Release source="fern-changelog" date="April 29, 2026" published="2026-04-29T00:00:00.000Z" url="https://buildwithfern.com/learn/docs/changelog/2026/4/29" canonical="https://releases.sh/release/rel_jTi2lxRiu8Hz4q8yKcYuK" truncated="true">
### April 29, 2026

## Redesigned dynamic OG images

Dynamic OG images have a new layout with fine-grained control over the logo variant, text and background colors, and ...
</Release>

<Release source="fern-changelog" date="April 27, 2026" published="2026-04-27T00:00:00.000Z" url="https://buildwithfern.com/learn/docs/changelog/2026/4/27" canonical="https://releases.sh/release/rel_8A4EmRNNmkUpyedprx9jK" truncated="true">
### April 27, 2026

## Prompt component

The `<Prompt>` component displays an AI prompt card with a title, icon, copy button, and optional "Open in" action buttons. Add i...
</Release>

<Release source="fern-changelog" date="April 24, 2026" published="2026-04-24T00:00:00.000Z" url="https://buildwithfern.com/learn/docs/changelog/2026/4/24" canonical="https://releases.sh/release/rel__lzwjt0Sr4s9qlC7XJSOh" truncated="true">
### April 24, 2026

## "Connect to Claude Code" page action

Fern Docs sites with [Ask Fern](/learn/docs/ai-features/ask-fern/overview) enabled now display a "Connect to ...
</Release>

<Release source="fern-changelog" date="April 23, 2026" published="2026-04-23T00:00:00.000Z" url="https://buildwithfern.com/learn/docs/changelog/2026/4/23" canonical="https://releases.sh/release/rel_8IYLnvJWvafHmjaACd7aa" truncated="true">
### April 23, 2026

## Clean up GitHub Actions preview deployments on merge

The [GitHub Actions preview workflow](/learn/docs/preview-publish/preview-changes#automate-wi...
</Release>

<Release source="fern-changelog" date="April 22, 2026" published="2026-04-22T00:00:00.000Z" url="https://buildwithfern.com/learn/docs/changelog/2026/4/22" canonical="https://releases.sh/release/rel_gzOdRSI16BCcs6gAkIas6" truncated="true">
### April 22, 2026

## Clean up GitLab preview deployments on merge

The updated [GitLab CI/CD pipeline](/learn/docs/developer-tools/git-lab#add-the-cicd-pipeline) now in...
</Release>

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