Google MCP - Model Context Protocol (MCP) Server

The Model Context Protocol (MCP) implementation in Google MCP enables AI models to interact with Google services through a standardized interface.

Prerequisites

• Go 1.23.2 or higher
• Google Cloud Platform account with the following APIs enabled:
  • Google Calendar API
  • Gmail API
  • Google Chat API
• Google Cloud credentials (OAuth 2.0 Client ID)

Installation

Installing via Go

1. Install the server:

go install github.com/nguyenvanduocit/google-mcp@latest

2. Create a .env file with your configuration:

# Required for Google Services
GOOGLE_CREDENTIALS_FILE=  # Required: Path to Google Cloud credentials JSON file
GOOGLE_TOKEN_FILE=       # Required: Path to store Google OAuth tokens

# Optional configurations
ENABLE_TOOLS=           # Optional: Comma-separated list of tool groups to enable (empty = all enabled)
PROXY_URL=             # Optional: HTTP/HTTPS proxy URL if needed

https://developers.google.com/workspace/chat/authenticate-authorize-chat-user

3. Configure your Claude’s config:

{
  "mcpServers": {
    "google_mcp": {
      "command": "google-mcp",
      "args": ["-env", "/path/to/.env"]
    }
  }
}

Enable Tools

The ENABLE_TOOLS environment variable is a comma-separated list of tool groups to enable. Available groups are:

• calendar - Google Calendar tools
• gmail - Gmail tools
• gchat - Google Chat tools

Leave it empty to enable all tools.

Available Tools

Group: calendar

calendar_create_event

Create a new event in Google Calendar with title, description, time, and attendees.

calendar_list_events

List upcoming events in Google Calendar with customizable time range and result limit.

calendar_update_event

Update an existing event’s details including title, description, time, and attendees.

calendar_respond_to_event

Respond to an event invitation (accept, decline, or tentative).

Group: gchat

gchat_list_spaces

List all available Google Chat spaces/rooms.

gchat_send_message

Send a message to a Google Chat space or direct message.

Group: gmail

gmail_search

Search emails in Gmail using Gmail’s search syntax.

gmail_move_to_spam

Move specific emails to spam folder in Gmail by message IDs.

gmail_create_filter

Create a Gmail filter with specified criteria and actions:

• Filter by sender, recipient, subject, or custom query
• Add labels
• Mark as important
• Mark as read
• Archive messages

gmail_list_filters

List all Gmail filters in the account.

gmail_list_labels

List all Gmail labels in the account.

gmail_delete_filter

Delete a Gmail filter by its ID.

gmail_delete_label

Delete a Gmail label by its ID.

CLI Usage

In addition to the MCP server, google-mcp ships a standalone CLI binary (google-cli) for direct terminal use — no MCP client needed.

Installation

just install-cli
# or
go install github.com/nguyenvanduocit/google-mcp/cmd/google-cli@latest

Quick Start

export GOOGLE_AI_API_KEY=your-api-key
# or
google-cli --env .env  [flags]

Commands

Examples

# List calendar events
google-cli list-events --calendar-id primary

# Send an email
google-cli send-email --to [email protected] --subject "Hello" --body "World"

# Search YouTube
google-cli search-youtube --query "Go programming"

# JSON output
google-cli list-emails --output json | jq '.[].subject'

Flags

Every command accepts:

• --env string — Path to .env file
• --output string — Output format: text (default) or json

License

This project is licensed under the MIT License. See LICENSE for details.

Installation

Homebrew (macOS/Linux)

brew install nguyenvanduocit/tap/google-mcp