Gemini + Fast.io

Workspaces for Gemini

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llms.txt • skill.md

Get started with Gemini CLI

Add the Fast.io 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 Fast.io MCP server config

Paste the config below into the file. This tells Gemini CLI where to find the Fast.io 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": {
    "fast-io": {
      "httpUrl": "https://mcp.fast.io/mcp"
    }
  }
}

Gemini CLI settings.json with Fast.io MCP server config

Start a new Gemini CLI session

Run the command below to start Gemini CLI. The Fast.io tools will be available automatically.

gemini

Verify the MCP connection

Type /mcp in Gemini to confirm the Fast.io server is connected. You should see fast-io listed with its available tools and resources.

/mcp

Gemini CLI showing /mcp command with Fast.io server connected

Sign in to Fast.io

Go to go.fast.io and sign in or create a free account. Click your user icon in the bottom-left corner and select Account & Admin.

Fast.io user menu showing Account & Admin option

Navigate to API Keys

In the Settings sidebar, click API Keys under Devices & Agents. Then click Create API Key.

Name your API key

Give the key a descriptive name (e.g. "Gemini CLI Key") and click Create.

Copy your API key

Copy the API key now since it won't be shown again. Click the copy icon to save it to your clipboard, then click Done.

Fast.io API key created with copy warning

Sign in to Fast.io from Gemini

Back in Gemini CLI, tell it to sign in to Fast.io with your API key. Type the text below in the chat and Gemini will use the auth tool to authenticate your session.

sign in to fast.io with an api key

Paste your API key

Gemini will ask for your Fast.io API key to authenticate. Paste the key you copied earlier into the prompt and press Enter to submit.

Gemini CLI prompting for Fast.io API key to authenticate

You're all set

Once authenticated, Gemini has full access to your Fast.io workspace. Try asking it to show your account details to confirm everything is working.

Gemini CLI authenticated and showing Fast.io account details

Try these prompts

Copy and paste these into Gemini to see Fast.io in action.

List all workspaces in this account

Create a new folder named "Images"

Give me a link to this newly created
                                        folder

Get started with Antigravity IDE

Add the Fast.io MCP server to Antigravity IDE through Settings.

Open the Agent panel menu

In Antigravity IDE, open the Agent panel and click the three-dots menu icon. Select MCP Servers from the dropdown.

Antigravity IDE Agent panel with MCP Servers menu option

Open the MCP Store

The MCP Store shows available server integrations. Click Manage MCP Servers in the top-right corner to configure a custom server.

Antigravity IDE MCP Store with Manage MCP Servers link

Open the raw config file

In the Manage MCPs panel, click View raw config to open the MCP configuration file directly.

Antigravity IDE Manage MCPs panel with View raw config button

View the empty config

The mcp_config.json file opens with an empty mcpServers object. This is where you'll add the Fast.io server config.

Empty mcp_config.json file in Antigravity IDE

Add the Fast.io MCP server config

Paste the config below into the file. You'll replace Your_Token with a real API key in a later step.

{
  "mcpServers": {
    "fast-io": {
      "serverUrl": "https://mcp.fast.io/mcp",
      "headers": {
        "Authorization": "Bearer Your_Token",
        "Content-Type": "application/json"
      }
    }
  }
}

mcp_config.json with Fast.io MCP server configuration

Sign in to Fast.io

Go to go.fast.io and sign in or create a free account. Click your user icon in the bottom-left corner and select Account & Admin.

Navigate to API Keys

In the Settings sidebar, click API Keys under Devices & Agents. Then click Create API Key.

Name your API key

Give the key a descriptive name (e.g. "Antigravity") and click Create.

Copy your API key

Copy the API key now since it won't be shown again. Click the copy icon to save it to your clipboard, then click Done.

Paste the API key into the config

Back in Antigravity IDE, replace Your_Token in the config file with the API key you just copied. Save the file.

mcp_config.json with real API key pasted in

Verify the MCP connection

Open the Manage MCPs panel again and click the Refresh button. You should see fast-io listed as connected with its available tools and an Enabled toggle.

Manage MCPs showing Fast.io server connected with tools

You're all set

Try asking the agent if it's signed in to Fast.io through its MCP. It should confirm it's authenticated and has access to all Fast.io tools.

Antigravity IDE agent confirming Fast.io authentication

Try these prompts

Copy and paste these into Gemini to see Fast.io in action.

List all workspaces in this account

Create a new folder named "Images"

Give me a link to this newly created
                                        folder

$0/mo

Free forever. 50GB storage included. No credit card required.

50 GB

Cloud Storage

5,000

Monthly Credits

251

MCP Tools

Monthly credits cover storage, bandwidth, and AI operations. Resets every 30 days.

FAQ

What is the Fast.io MCP server?

It's a server that provides Gemini with 251 workspace tools. By adding it to your config, Gemini can upload files, create share links, and query documents using RAG.

How does authentication work?

The first time Gemini uses a Fast.io 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 Gemini uploads?

Yes. Everything Gemini stores is accessible at app.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 happens when I hit the credit limit?

You get 5,000 credits per month. When they run out, new uploads and AI queries pause until the next cycle. Existing files and share links 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.

Give Gemini a professional workspace

Enable 251 tools for Gemini in minutes. Built-in shared workspaces, RAG search, and file sharing.

Get Started Setup Guide