An astronaut overseeing a futuristic data hub
Download PDFMarkdown Version

Connect Fern to ChatGPT, Claude and Gemini

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Control your docs and indexing directly from your AI agent.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

Waiting for input…

Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

A futuristic MCP client docking bay
V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 6 capabilities

We ship only the actions that matter.

Capability set01 / 02

01-03

3 capabilities in this set.

Part of 6 available through Fern.

  1. 01

    Get jwt

    This capability generates a JWT using your Fern API key for secure authentication.

  2. 02

    Get recent queries

    Use this to pull the latest user search queries and analytics from your documentation.

  3. 03

    Get search key

    This capability retrieves Algolia search credentials to enable search functionality.

Capability set02 / 02

04-06

3 capabilities in this set.

Part of 6 available through Fern.

  1. 04

    Index website

    Trigger a new crawling and indexing job to keep your documentation searchable for Ask Fern.

  2. 05

    Post chat completion

    This capability lets you interact directly with the Ask Fern AI assistant to get answers from your docs.

  3. 06

    Whoami

    Check your current authentication status and user details with this capability.

Real work

What teams actually run

01

Content Updates

After pushing new code, you tell your agent to re-index the site so the new docs are searchable.

02

User Support

A support agent asks the AI to find specific technical answers within the Fern docs.

03

Security Auditing

A developer uses the agent to generate a search key or verify user permissions.

04

Trend Analysis

You ask your agent for recent queries to identify common friction points in your API docs.

Automate a task

Put Fern to work on one thing.

Step-by-step automations your AI runs through this Connector: the workflow, the prompts to start with, and the exact capabilities behind each move.

One connector, every AI

Fern works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

ClaudeClaudeChatGPTChatGPTGeminiGeminiPerplexityPerplexityGrokGrokMicrosoft CopilotMicrosoft CopilotCursorCursorVS CodeVS CodeWindsurfWindsurfJetBrainsJetBrainsClineClineLangChainLangChainVercel AI SDKVercel AI SDKLovableLovableZ.aiZ.aiRaycastRaycastQwen CodeQwen CodeKimi CodeKimi CodeLe ChatLe Chat

Building your own app? The connector is yours to use.

You don't need a client to put Fern to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

985ms average. Fast in production.

Fern is checked daily against the live service.

Daily averagePeak 1588ms
Oct 12Today
Fastest day
872ms
Slowest day
1588ms
14-day trend
Improving-37%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 6 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of Fern, so you can see the experience inside your AI.

It does not authenticate your account with Fern. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Fern Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_VqEKputPZIEstF5UI8C28igkFzBgP67EyQDUBcP9/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — Fern capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "fern-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_VqEKputPZIEstF5UI8C28igkFzBgP67EyQDUBcP9/mcp"
    }
  }
}
  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up Fern in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Fern owners hand off.

This MCP is built for technical teams who manage large-scale documentation ecosystems.

  • 01

    Documentation Engineers

    They hand off indexing tasks and analytics monitoring to their AI agent.

  • 02

    Support Teams

    They use the agent to quickly find answers within complex documentation domains.

  • 03

    Developers

    They use the agent to programmatically manage access keys and verify permissions.

FAQ

Questions Fern owners ask.

  • 01

    What do I need to use this MCP?

    You will need a valid Fern API Key and Token to authenticate your connection.

  • 02

    Can I use this with Cursor or VS Code?

    Yes, this MCP works with any MCP-compatible client, including Cursor, VS Code, and Windsurf.

  • 03

    How do I update my documentation search results?

    You can use the index_website capability to trigger a new crawling and indexing job for your site.

  • 04

    Is my documentation access secure?

    Yes, the MCP includes capabilities like get_jwt and get_search_key to manage secure access via Fern.

  • 05

    How can I see what users are searching for?

    You can use the get_recent_queries capability to retrieve recent user queries and analytics.

  • 06

    Can I use the AI assistant to query my documentation?

    Yes, use the post_chat_completion capability with your documentation domain and a list of messages. The agent will interact with the Ask Fern assistant to provide relevant answers.

  • 07

    How do I update the search index for a new site?

    Use the index_website capability by providing the documentation domain and the base URL you want to crawl. This will trigger a new indexing job for the Ask Fern assistant.

  • 08

    How can I see what my users are searching for?

    The get_recent_queries capability allows you to retrieve analytics and recent questions asked by users on a specific documentation domain.

Explore

More in Developer Tools

Suggestions

Connect Fern to Claude, Cursor, ChatGPT & more