Get started with Gemini CLI
Add the Fastio MCP server to Gemini CLI using your settings file.
Open the Gemini settings file
Open the Gemini CLI settings file in a text editor (or create it if it doesn't exist). To edit with nano, for example, copy the text below and paste into your terminal.
nano ~/.gemini/settings.json 
Add the Fastio MCP server config
Paste the config below into the file. This tells Gemini CLI where to find the Fastio MCP server. Exit nano by pressing Ctrl+X, then Y, and finally Enter to save. You may not need the outer braces if there are other configs in the file.
{
"mcpServers": {
"fastio": {
"httpUrl": "https://mcp.fast.io/mcp/code"
}
}
} Start a new Gemini CLI session
Run the command below to start Gemini CLI. The Fastio tools will be available automatically.
gemini 
Sign in to Fastio
Run the command below in Gemini CLI. A Fastio sign-in page opens in your browser. Sign in, then on the Review Permissions screen choose Read Only or Read & Write and which workspaces Gemini can reach. There is no API key to create or paste.
/mcp auth fastio Verify the MCP connection
Type /mcp in Gemini to confirm the Fastio server is connected.
You should see fastio listed with its available tools and resources.
/mcp You're all set
Once you are signed in, Gemini can work in the Fastio workspaces you allowed. Try asking it to show your account details to confirm everything is working.
Try these prompts
Copy and paste these into Gemini 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 
$9.99/mo ($99/year). 14-day Business Trial first.
Monthly usage covers storage, bandwidth, and AI operations. Resets every 30 days.
Once Gemini is connected
Connecting is the first step. Here is what the workspace behind it does.
Works with Your Agent
A consolidated MCP toolset, persistent files, and somewhere for your agent to put its output.
Ripley AI
Search everything stored, chat with documents, and get summaries without opening a file.
Secure Workspaces
Org-owned shared spaces with granular permissions and per-file version history.
Cloud Import
Bring existing files in from Google Drive, Dropbox, OneDrive, Box, or any public URL.
Customizable Shares
Hand finished work to clients through links or branded portals. No account needed to open one.
Company Brain
Cited answers drawn from the documents your organization already has.
FAQ
What is the Fastio MCP server?
It's a server that provides Gemini with a consolidated set of workspace tools. By adding it to your config, Gemini can upload files, create share links, and query documents using RAG.
How does authentication work?
Gemini CLI and Antigravity IDE sign in to Fastio in your browser. In Gemini CLI you run /mcp auth fastio, and in Antigravity you select Authenticate next to fastio in Agent settings. You choose Read Only or Read & Write and which workspaces the connection can reach, so there are no API keys to manage.
Can I see what Gemini uploads?
Yes. Everything Gemini stores is accessible at go.fast.io. You can browse, preview, comment on, and download files from any device.
Does this work with Gemini CLI and Antigravity IDE?
Yes. It works with both. For Gemini CLI, you add the config to ~/.gemini/settings.json. For Antigravity IDE, you add it through Settings.
What are the usage limits on the plans?
Fastio starts with a 14-day Business Trial. Our Starter plan ($9.99/mo) includes 250 GB storage and 100,000 credits/mo. Business ($49.99/mo) includes 5 TB storage and 600,000 credits/mo. Enterprise ($199.99/mo) includes 25 TB storage and 3,000,000 credits/mo. Existing files and share links always remain accessible.
Can Gemini share files with people who don't use Gemini?
Yes. Share links are regular web URLs. Recipients open them in a browser and get previews, downloads, and commenting features without needing an account.
Use the Fastio CLI for terminal access alongside Gemini's MCP integration.
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 Gemini a professional workspace
Enable the consolidated MCP toolset for Gemini in minutes. Built-in shared workspaces, RAG search, and file sharing.