Get started with Grok
Connect Fastio to Grok with a custom connector.
Open Skills and Connectors
Open Grok at grok.com and click Skills and Connectors in the left sidebar.
Go to the Connectors tab
On the Skills and Connectors page, click the Connectors tab.
Add a new connector
Click New Connector in the top right.
Select Custom
In the New Connector modal, choose Custom to enter your own MCP server URL.
Enter the connector name
Give the connector a name. We recommend Fastio.
Fastio 
Enter the server URL
Paste the MCP server URL below into the URL field, then click Add Connector.
https://mcp.fast.io/mcp/oauth 
Creating the connector
Grok will spin up the connection. This usually takes just a few seconds.
Review permissions
You'll be redirected to Fastio to review permissions. Select your Access level and click Continue.
Approve the connection
Confirm the connection by clicking Approve to grant the Fastio MCP Agent access to your account.
Authorization successful
Fastio completes the authorization and redirects you back to Grok automatically. This takes just a few seconds.
Connector added
Once you see "Connector added successfully", Fastio appears under Installed with a Connected status.
You're all set
Grok is now connected to your Fastio account. You can ask Grok for details about your account to confirm the connection.
Try these prompts
Copy and paste these into Grok to see Fastio in action.
List all workspaces in this account Create a new folder named "Images" Give me a link to this newly created
folder 
Everything your agents need to get work done
Give Grok a secure space to store, analyze, and share files alongside your team.
API
org-create-workspace Create project-scoped workspaces on demand. Intelligence mode auto-indexes files for RAG.
Files + Folders
workspace-storage-* CRUD, move, copy, versions, locks, previews for 10+ formats. Chunked uploads up to 1GB.
Import
web-upload Import files from any URL. OAuth support for Google Drive, OneDrive, Box, Dropbox. No local I/O.
Semantic Search
workspace-search Find files by meaning, not keywords. "Show me contracts with indemnity clauses" works.
AI Chat (RAG)
ai-chat-create Ask questions across entire workspaces. Auto-summarization, citations, metadata extraction.
MCP Server
mcp.fast.io Consolidated tools via Streamable HTTP or SSE. Session state persisted in Durable Objects.
Webhooks
webhook-create Real-time notifications for file events. Build reactive workflows without polling.
Ownership Transfer
org-transfer-ownership Build for humans, then hand off. Agent keeps admin access after transfer.
Shares & Content Portals
share-create Three modes: Send (deliver), Receive (collect), Exchange (collaborate). Password protection, expiration, branding.
Comments & Annotations
comments-* Region-anchored feedback on images, timestamps on video/audio, page-specific on PDFs. Threaded replies.
$29/mo ($24/mo annually). 14-day Business Trial first.
Monthly usage covers storage, bandwidth, and AI operations. Resets every 30 days.
FAQ
What is the Fastio MCP server?
It's a server that provides Grok with a consolidated set of workspace tools. By adding it to your config, Grok can upload files, create share links, and query documents using RAG.
How does authentication work?
The first time Grok uses a Fastio tool, it opens a browser tab to sign in or create a free account. Your session persists, so there are no API keys to manage manually.
Can I see what Grok uploads?
Yes. Everything Grok stores is accessible at app.fast.io. You can browse, preview, comment on, and download files from any device.
Does this work with Grok and Grok CLI?
Yes. It works with both. For Grok in the browser, you add a custom connector in the Skills and Connectors panel. For Grok CLI, you use the 'grok mcp add' command.
What are the usage limits on the plans?
Fastio starts with a 14-day Business Trial. Our Solo plan ($29/mo) includes 1 TB storage and 300,000 credits/mo. Business ($99/mo) includes 10 TB storage and 1,200,000 credits/mo. Growth ($299/mo) includes 50 TB storage and 4,500,000 credits/mo. Existing files and share links always remain accessible.
Can Grok share files with people who don't use Grok?
Yes. Share links are regular web URLs. Recipients open them in a browser and get previews, downloads, and commenting features without needing an account.
Grok CLI users are already in the terminal.
The Fastio CLI gives you the same workspace tools — upload,
search, share — as a standalone command. It also includes a
built-in MCP server via fastio mcp.
npm install --global @vividengine/fastio-cli
Learn more
Give Grok a professional workspace
Enable the consolidated MCP toolset for Grok in minutes. Built-in shared workspaces, RAG search, and file sharing.